Cleancache

Cleancache

[dexen deVries]

Hi list,


there's that recent interesting addition to linux: `cleancache' (and 
`zcache').
I've enabled it for NILFS2 yesterday (in 3.0-rc2).
It seemed to work for a while -- sensible numbers in 
/sys/kernel/mm/cleancache/* 
But it broke terribly after performing
echo 3 > /proc/sys/vm/drop_caches
kernel reported NULL pointer dereference, IIRC. Ext4 works a-OK with that, so 
my first guess waws NILFS2 is doing something funky with page allocation or 
mapping.

Cleancache has own hooks into VFS, and for `normal' filesystem that's enough; 
at least enough for ext3 and ext4 drivers to work reliably. On the other hand, 
btrfs does something unusual with pages and they used extra cleancache hooks 
for btrfs, IIRC.

Should I dig further, post backtraces or something?

I believe using cleancache + zcache could be beneficial, especially for NILFS2 
metadata like the DAT file; what are your thoughts on it?


Regards,
-- 
dexen deVries

[[[↓][→]]]

For example, if the first thing in the file is:
   <?kzy irefvba="1.0" rapbqvat="ebg13"?>
an XML parser will recognize that the document is stored in the traditional 
ROT13 encoding.

(( Joe English, http://www.flightlab.com/~joe/sgml/faq-not.txt ))
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Re: Cleancache

[Ryusuke Konishi]

On Wed, 8 Jun 2011 15:14:59 +0200, dexen deVries wrote:
> Hi list,
> 
> 
> there's that recent interesting addition to linux: `cleancache' (and 
> `zcache').
> I've enabled it for NILFS2 yesterday (in 3.0-rc2).
> It seemed to work for a while -- sensible numbers in 
> /sys/kernel/mm/cleancache/* 
> But it broke terribly after performing
> echo 3 > /proc/sys/vm/drop_caches
> kernel reported NULL pointer dereference, IIRC. Ext4 works a-OK with that, so 
> my first guess waws NILFS2 is doing something funky with page allocation or 
> mapping.
> 
> Cleancache has own hooks into VFS, and for `normal' filesystem that's enough; 
> at least enough for ext3 and ext4 drivers to work reliably. On the other hand, 
> btrfs does something unusual with pages and they used extra cleancache hooks 
> for btrfs, IIRC.
> 
> Should I dig further, post backtraces or something?

Interesting.

Can you get a log of the oops ?

I may have time to look into the problem in this weekend.


Regards,
Ryusuke Konishi

 
> I believe using cleancache + zcache could be beneficial, especially for NILFS2 
> metadata like the DAT file; what are your thoughts on it?
> 
> 
> Regards,
> -- 
> dexen deVries
> 
> [[[↓][→]]]
> 
> For example, if the first thing in the file is:
>    <?kzy irefvba="1.0" rapbqvat="ebg13"?>
> an XML parser will recognize that the document is stored in the traditional 
> ROT13 encoding.
> 
> (( Joe English, http://www.flightlab.com/~joe/sgml/faq-not.txt ))
> --
> To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in
> the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
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Re: Cleancache

[Ryusuke Konishi]

Hi dexen,
On Wed, 08 Jun 2011 23:02:31 +0900 (JST), Ryusuke Konishi wrote:
> On Wed, 8 Jun 2011 15:14:59 +0200, dexen deVries wrote:
> > Hi list,
> > 
> > 
> > there's that recent interesting addition to linux: `cleancache' (and 
> > `zcache').
> > I've enabled it for NILFS2 yesterday (in 3.0-rc2).
> > It seemed to work for a while -- sensible numbers in 
> > /sys/kernel/mm/cleancache/* 
> > But it broke terribly after performing
> > echo 3 > /proc/sys/vm/drop_caches
> > kernel reported NULL pointer dereference, IIRC. Ext4 works a-OK with that, so 
> > my first guess waws NILFS2 is doing something funky with page allocation or 
> > mapping.
> > 
> > Cleancache has own hooks into VFS, and for `normal' filesystem that's enough; 
> > at least enough for ext3 and ext4 drivers to work reliably. On the other hand, 
> > btrfs does something unusual with pages and they used extra cleancache hooks 
> > for btrfs, IIRC.
> > 
> > Should I dig further, post backtraces or something?
> 
> Interesting.
> 
> Can you get a log of the oops ?
> 
> I may have time to look into the problem in this weekend.

I couldn't reproduce this problem.
Could you tell me more about how you did it.

May I reproduce the oops on native machines ? (I mean non-virtual
machine environment).

Regards,
Ryusuke Konishi

>  
> > I believe using cleancache + zcache could be beneficial, especially for NILFS2 
> > metadata like the DAT file; what are your thoughts on it?
> > 
> > 
> > Regards,
> > -- 
> > dexen deVries
> > 
> > [[[↓][→]]]
> > 
> > For example, if the first thing in the file is:
> >    <?kzy irefvba="1.0" rapbqvat="ebg13"?>
> > an XML parser will recognize that the document is stored in the traditional 
> > ROT13 encoding.
> > 
> > (( Joe English, http://www.flightlab.com/~joe/sgml/faq-not.txt ))
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in
> > the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> --
> To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in
> the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
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Re: Cleancache

[dexen deVries]

Hi Ryusuke,


On Monday 13 of June 2011 15:15:03 you wrote:
> I couldn't reproduce this problem.
> Could you tell me more about how you did it.
> 
> May I reproduce the oops on native machines ? (I mean non-virtual
> machine environment).

I'll try to re-create the condition today; been busy through last weekend, 
sorry~

It was on an 2-CPU SMP + SMT machine, raw hardware, if that makes any 
difference; I'll see also if it gets triggered on VirtualBox.


Regards,
-- 
dexen deVries

[[[↓][→]]]

For example, if the first thing in the file is:
   <?kzy irefvba="1.0" rapbqvat="ebg13"?>
an XML parser will recognize that the document is stored in the traditional 
ROT13 encoding.

(( Joe English, http://www.flightlab.com/~joe/sgml/faq-not.txt ))
--
To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in
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Re: Cleancache

[Ryusuke Konishi]

On Mon, 13 Jun 2011 15:21:15 +0200, dexen deVries wrote:
> Hi Ryusuke,
> 
> 
> On Monday 13 of June 2011 15:15:03 you wrote:
> > I couldn't reproduce this problem.
> > Could you tell me more about how you did it.
> > 
> > May I reproduce the oops on native machines ? (I mean non-virtual
> > machine environment).
> 
> I'll try to re-create the condition today; been busy through last weekend, 
> sorry~

Ok, thanks.

> It was on an 2-CPU SMP + SMT machine, raw hardware, if that makes any 
> difference; I'll see also if it gets triggered on VirtualBox.

So, you hit the bug on a raw hadrware.
In my hardware, /sys/kernel/mm/cleancache/* didn't change.

Is it reproducible without zcache?

If not, we should share the steps with zcache.

Regards,
Ryusuke Konishi
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Re: Cleancache

[dexen deVries]

[-- Attachment #1: Type: Text/Plain, Size: 1105 bytes --]

Hi Ryusuke,


On Monday 13 June 2011 16:40:48 you wrote:
> So, you hit the bug on a raw hadrware.
> In my hardware, /sys/kernel/mm/cleancache/* didn't change.
> 
> Is it reproducible without zcache?
> 
> If not, we should share the steps with zcache.


I think I've got it reproductable. I believe it shouldn't matter whether it's 
bare metal or virtualized OS.

First off, attached is kernel log of the crash. Kernel version is 3.0-rc2 with 
a slight change for zcache -- more on that in next mail.


Steps to reproduce:
1) enable zcache (important details in the next mail)
2) hack NILFS2 to add cleancache (in next mail, again)
3) compile, boot etc.
4) mount NILFS2
5) (important!) read content of some file(s) from NILFS2 (it seems to me 
cleancache currently handles only file data, not metadata; but I may be wrong 
here
6) echo 3 > /proc/sys/vm/drop_caches

As far as I remember, the `echo 3 > /proc/sys/vm/drop_caches' it worked a-OK 
with EXT4 alone. Want me to verify that?


Thanks for your patience ;-)
-- 
dexen deVries

``One can't proceed from the informal to the formal by formal means.''

[-- Attachment #2: nilfs-cleancache-dmesg-fragment.txt --]
[-- Type: text/plain, Size: 5525 bytes --]

<1>BUG: unable to handle kernel NULL pointer dereference at           (null)
<1>IP: [<ffffffff81197b17>] nilfs_encode_fh+0x3b/0xc4
<4>PGD 123b20067 PUD 123b18067 PMD 0 
<0>Oops: 0000 [#1] PREEMPT SMP 
<4>CPU 0 
<4>Modules linked in:
<4>
<4>Pid: 933, comm: bash Not tainted 3.0.0-rc2-l28cc_n_t+ #6 Dell Inc. Precision WorkStation T3400  /0TP412
<4>RIP: 0010:[<ffffffff81197b17>]  [<ffffffff81197b17>] nilfs_encode_fh+0x3b/0xc4
<4>RSP: 0018:ffff880122977af8  EFLAGS: 00010046
<4>RAX: 00000000000000ff RBX: ffff880122977b28 RCX: 0000000000000000
<4>RDX: ffff8801254908e0 RSI: 0000000000000006 RDI: 0000000000000000
<4>RBP: ffff880122977b18 R08: ffffffff81197adc R09: ffff880122977cc8
<4>R10: ffffffff810dfafb R11: 0000000000000001 R12: ffff880122977c28
<4>R13: ffff880122977bf4 R14: 0000000000000000 R15: ffff880125490a28
<4>FS:  00007ff682f14720(0000) GS:ffff88012bc00000(0000) knlGS:0000000000000000
<4>CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4>CR2: 0000000000000000 CR3: 00000001228f6000 CR4: 00000000000006f0
<4>DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
<4>DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
<4>Process bash (pid: 933, threadinfo ffff880122976000, task ffff880125b81ea0)
<0>Stack:
<4> ffff880122977c28 0000000000000000 ffffea0003feece8 0000000000000000
<4> ffff880122977bf8 ffffffff810bb3be ffff880122977b58 0000000000000092
<4> ffff880125490de0 ffff880122977b88 ffffea0003f97e50 ffff880122977b78
<0>Call Trace:
<4> [<ffffffff810bb3be>] cleancache_get_key+0x4a/0x67
<4> [<ffffffff810baf47>] ? lookup_page_cgroup+0x31/0x47
<4> [<ffffffff81036a81>] ? get_parent_ip+0x11/0x41
<4> [<ffffffff81036a81>] ? get_parent_ip+0x11/0x41
<4> [<ffffffff81036b43>] ? sub_preempt_count+0x92/0xa5
<4> [<ffffffff810bb52a>] __cleancache_flush_page+0x42/0x75
<4> [<ffffffff810dfafb>] ? free_buffer_head+0x1f/0x60
<4> [<ffffffff81087541>] __delete_from_page_cache+0x6d/0x10a
<4> [<ffffffff81090eef>] __remove_mapping+0xaa/0xdc
<4> [<ffffffff8109140d>] remove_mapping+0x11/0x31
<4> [<ffffffff81090741>] invalidate_inode_page+0x89/0x97
<4> [<ffffffff810907e7>] invalidate_mapping_pages+0x98/0x139
<4> [<ffffffff81036a81>] ? get_parent_ip+0x11/0x41
<4> [<ffffffff81036a81>] ? get_parent_ip+0x11/0x41
<4> [<ffffffff810da980>] ? propagate_umount+0x8a/0x8a
<4> [<ffffffff810daa0c>] drop_pagecache_sb+0x8c/0xde
<4> [<ffffffff810bf6b4>] iterate_supers+0x6d/0xc2
<4> [<ffffffff810daa92>] drop_caches_sysctl_handler+0x34/0x76
<4> [<ffffffff81104066>] proc_sys_call_handler.clone.1+0x81/0xab
<4> [<ffffffff811040a3>] proc_sys_write+0x13/0x15
<4> [<ffffffff810bd275>] vfs_write+0xa7/0xda
<4> [<ffffffff810be32e>] ? fget_light+0x3d/0x9c
<4> [<ffffffff810bd42d>] sys_write+0x45/0x69
<4> [<ffffffff814811bb>] system_call_fastpath+0x16/0x1b
<0>Code: 41 54 49 89 f4 53 41 8b 75 00 48 89 fb 48 8b 57 30 83 fe 04 48 8b 7a f8 0f 86 8d 00 00 00 85 c9 74 09 83 fe 07 0f 86 80 00 00 00 
<48> 8b 07 85 c9 49 89 04 24 48 8b 82 a8 00 00 00 49 89 44 24 08 
<1>RIP  [<ffffffff81197b17>] nilfs_encode_fh+0x3b/0xc4
<4> RSP <ffff880122977af8>
<0>CR2: 0000000000000000
<4>---[ end trace 0d0bfc97f7bb3efc ]---
<6>note: bash[933] exited with preempt_count 1
<3>BUG: scheduling while atomic: bash/933/0x10000002
<4>Modules linked in:
<4>Pid: 933, comm: bash Tainted: G      D     3.0.0-rc2-l28cc_n_t+ #6
<4>Call Trace:
<4> [<ffffffff81034162>] __schedule_bug+0x5a/0x5f
<4> [<ffffffff8147ed7b>] schedule+0x9d/0x4f3
<4> [<ffffffff810d3f22>] ? mntput_no_expire+0x27/0xc8
<4> [<ffffffff8103889b>] __cond_resched+0x13/0x1f
<4> [<ffffffff8147f3ac>] _cond_resched+0x16/0x1d
<4> [<ffffffff810405a9>] put_files_struct+0x78/0xd1
<4> [<ffffffff81040695>] exit_files+0x46/0x4f
<4> [<ffffffff81040bb3>] do_exit+0x22f/0x6b3
<4> [<ffffffff8103eec1>] ? kmsg_dump+0xcc/0xdb
<4> [<ffffffff810054fd>] oops_end+0xb1/0xb9
<4> [<ffffffff81020739>] no_context+0x1f4/0x203
<4> [<ffffffff810208d0>] __bad_area_nosemaphore+0x188/0x1ab
<4> [<ffffffff81020901>] bad_area_nosemaphore+0xe/0x10
<4> [<ffffffff81020c6a>] do_page_fault+0x142/0x31c
<4> [<ffffffff81480dcf>] page_fault+0x1f/0x30
<4> [<ffffffff810dfafb>] ? free_buffer_head+0x1f/0x60
<4> [<ffffffff81197adc>] ? nilfs_fh_to_dentry+0x2b/0x2b
<4> [<ffffffff81197b17>] ? nilfs_encode_fh+0x3b/0xc4
<4> [<ffffffff810bb3be>] cleancache_get_key+0x4a/0x67
<4> [<ffffffff810baf47>] ? lookup_page_cgroup+0x31/0x47
<4> [<ffffffff81036a81>] ? get_parent_ip+0x11/0x41
<4> [<ffffffff81036a81>] ? get_parent_ip+0x11/0x41
<4> [<ffffffff81036b43>] ? sub_preempt_count+0x92/0xa5
<4> [<ffffffff810bb52a>] __cleancache_flush_page+0x42/0x75
<4> [<ffffffff810dfafb>] ? free_buffer_head+0x1f/0x60
<4> [<ffffffff81087541>] __delete_from_page_cache+0x6d/0x10a
<4> [<ffffffff81090eef>] __remove_mapping+0xaa/0xdc
<4> [<ffffffff8109140d>] remove_mapping+0x11/0x31
<4> [<ffffffff81090741>] invalidate_inode_page+0x89/0x97
<4> [<ffffffff810907e7>] invalidate_mapping_pages+0x98/0x139
<4> [<ffffffff81036a81>] ? get_parent_ip+0x11/0x41
<4> [<ffffffff81036a81>] ? get_parent_ip+0x11/0x41
<4> [<ffffffff810da980>] ? propagate_umount+0x8a/0x8a
<4> [<ffffffff810daa0c>] drop_pagecache_sb+0x8c/0xde
<4> [<ffffffff810bf6b4>] iterate_supers+0x6d/0xc2
<4> [<ffffffff810daa92>] drop_caches_sysctl_handler+0x34/0x76
<4> [<ffffffff81104066>] proc_sys_call_handler.clone.1+0x81/0xab
<4> [<ffffffff811040a3>] proc_sys_write+0x13/0x15
<4> [<ffffffff810bd275>] vfs_write+0xa7/0xda
<4> [<ffffffff810be32e>] ? fget_light+0x3d/0x9c
<4> [<ffffffff810bd42d>] sys_write+0x45/0x69
<4> [<ffffffff814811bb>] system_call_fastpath+0x16/0x1b

Re: Cleancache [2]

[dexen deVries]

[-- Attachment #1: Type: Text/Plain, Size: 985 bytes --]

On Monday 13 June 2011 16:40:48 you wrote:
> Is it reproducible without zcache?

I don't know how to check cleancache without zcache; cleancache itself doesn't 
do anything unless it has some backend configured, and zcache is the only 
backend I know of and can use.


To enable zcache you need to have one `zcache' argument in kernel's command 
line.
 

There's an outstanding bug in zcache's build system:
http://code.google.com/p/compcache/issues/detail?id=91

In short, core part of zcache may end up not being compiled at all ;-(

To build zcache in 3.0-rc2, you need to hack it a bit with the attach'd patch. 
Basically it renames the `zcache.c' to `zcache-core.c' and updates Makefile.


To verify zcache is enabled, look through dmesg for two lines like:
> zcache: cleancache enabled using kernel transcendent memory and compression 
buddies
>zcache: created ephemeral tmem pool, id=0


-- 
dexen deVries

``One can't proceed from the informal to the formal by formal means.''

[-- Attachment #2: zcache-makefile.patch --]
[-- Type: text/x-patch, Size: 94564 bytes --]

diff --git a/drivers/staging/zcache/Makefile b/drivers/staging/zcache/Makefile
index f5ec64f..21c1dca 100644
--- a/drivers/staging/zcache/Makefile
+++ b/drivers/staging/zcache/Makefile
@@ -1,3 +1,3 @@
-zcache-y	:=	tmem.o
+zcache-y	:=	tmem.o zcache-core.o
 
 obj-$(CONFIG_ZCACHE)	+=	zcache.o
diff --git a/drivers/staging/zcache/zcache-core.c b/drivers/staging/zcache/zcache-core.c
new file mode 100644
index 0000000..77ac2d4
--- /dev/null
+++ b/drivers/staging/zcache/zcache-core.c
@@ -0,0 +1,1661 @@
+/*
+ * zcache.c
+ *
+ * Copyright (c) 2010,2011, Dan Magenheimer, Oracle Corp.
+ * Copyright (c) 2010,2011, Nitin Gupta
+ *
+ * Zcache provides an in-kernel "host implementation" for transcendent memory
+ * and, thus indirectly, for cleancache and frontswap.  Zcache includes two
+ * page-accessible memory [1] interfaces, both utilizing lzo1x compression:
+ * 1) "compression buddies" ("zbud") is used for ephemeral pages
+ * 2) xvmalloc is used for persistent pages.
+ * Xvmalloc (based on the TLSF allocator) has very low fragmentation
+ * so maximizes space efficiency, while zbud allows pairs (and potentially,
+ * in the future, more than a pair of) compressed pages to be closely linked
+ * so that reclaiming can be done via the kernel's physical-page-oriented
+ * "shrinker" interface.
+ *
+ * [1] For a definition of page-accessible memory (aka PAM), see:
+ *   http://marc.info/?l=linux-mm&m=127811271605009
+ */
+
+#include <linux/cpu.h>
+#include <linux/highmem.h>
+#include <linux/list.h>
+#include <linux/lzo.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+#include <linux/atomic.h>
+#include "tmem.h"
+
+#include "../zram/xvmalloc.h" /* if built in drivers/staging */
+
+#if (!defined(CONFIG_CLEANCACHE) && !defined(CONFIG_FRONTSWAP))
+#error "zcache is useless without CONFIG_CLEANCACHE or CONFIG_FRONTSWAP"
+#endif
+#ifdef CONFIG_CLEANCACHE
+#include <linux/cleancache.h>
+#endif
+#ifdef CONFIG_FRONTSWAP
+#include <linux/frontswap.h>
+#endif
+
+#if 0
+/* this is more aggressive but may cause other problems? */
+#define ZCACHE_GFP_MASK	(GFP_ATOMIC | __GFP_NORETRY | __GFP_NOWARN)
+#else
+#define ZCACHE_GFP_MASK \
+	(__GFP_FS | __GFP_NORETRY | __GFP_NOWARN | __GFP_NOMEMALLOC)
+#endif
+
+/**********
+ * Compression buddies ("zbud") provides for packing two (or, possibly
+ * in the future, more) compressed ephemeral pages into a single "raw"
+ * (physical) page and tracking them with data structures so that
+ * the raw pages can be easily reclaimed.
+ *
+ * A zbud page ("zbpg") is an aligned page containing a list_head,
+ * a lock, and two "zbud headers".  The remainder of the physical
+ * page is divided up into aligned 64-byte "chunks" which contain
+ * the compressed data for zero, one, or two zbuds.  Each zbpg
+ * resides on: (1) an "unused list" if it has no zbuds; (2) a
+ * "buddied" list if it is fully populated  with two zbuds; or
+ * (3) one of PAGE_SIZE/64 "unbuddied" lists indexed by how many chunks
+ * the one unbuddied zbud uses.  The data inside a zbpg cannot be
+ * read or written unless the zbpg's lock is held.
+ */
+
+#define ZBH_SENTINEL  0x43214321
+#define ZBPG_SENTINEL  0xdeadbeef
+
+#define ZBUD_MAX_BUDS 2
+
+struct zbud_hdr {
+	uint32_t pool_id;
+	struct tmem_oid oid;
+	uint32_t index;
+	uint16_t size; /* compressed size in bytes, zero means unused */
+	DECL_SENTINEL
+};
+
+struct zbud_page {
+	struct list_head bud_list;
+	spinlock_t lock;
+	struct zbud_hdr buddy[ZBUD_MAX_BUDS];
+	DECL_SENTINEL
+	/* followed by NUM_CHUNK aligned CHUNK_SIZE-byte chunks */
+};
+
+#define CHUNK_SHIFT	6
+#define CHUNK_SIZE	(1 << CHUNK_SHIFT)
+#define CHUNK_MASK	(~(CHUNK_SIZE-1))
+#define NCHUNKS		(((PAGE_SIZE - sizeof(struct zbud_page)) & \
+				CHUNK_MASK) >> CHUNK_SHIFT)
+#define MAX_CHUNK	(NCHUNKS-1)
+
+static struct {
+	struct list_head list;
+	unsigned count;
+} zbud_unbuddied[NCHUNKS];
+/* list N contains pages with N chunks USED and NCHUNKS-N unused */
+/* element 0 is never used but optimizing that isn't worth it */
+static unsigned long zbud_cumul_chunk_counts[NCHUNKS];
+
+struct list_head zbud_buddied_list;
+static unsigned long zcache_zbud_buddied_count;
+
+/* protects the buddied list and all unbuddied lists */
+static DEFINE_SPINLOCK(zbud_budlists_spinlock);
+
+static LIST_HEAD(zbpg_unused_list);
+static unsigned long zcache_zbpg_unused_list_count;
+
+/* protects the unused page list */
+static DEFINE_SPINLOCK(zbpg_unused_list_spinlock);
+
+static atomic_t zcache_zbud_curr_raw_pages;
+static atomic_t zcache_zbud_curr_zpages;
+static unsigned long zcache_zbud_curr_zbytes;
+static unsigned long zcache_zbud_cumul_zpages;
+static unsigned long zcache_zbud_cumul_zbytes;
+static unsigned long zcache_compress_poor;
+
+/* forward references */
+static void *zcache_get_free_page(void);
+static void zcache_free_page(void *p);
+
+/*
+ * zbud helper functions
+ */
+
+static inline unsigned zbud_max_buddy_size(void)
+{
+	return MAX_CHUNK << CHUNK_SHIFT;
+}
+
+static inline unsigned zbud_size_to_chunks(unsigned size)
+{
+	BUG_ON(size == 0 || size > zbud_max_buddy_size());
+	return (size + CHUNK_SIZE - 1) >> CHUNK_SHIFT;
+}
+
+static inline int zbud_budnum(struct zbud_hdr *zh)
+{
+	unsigned offset = (unsigned long)zh & (PAGE_SIZE - 1);
+	struct zbud_page *zbpg = NULL;
+	unsigned budnum = -1U;
+	int i;
+
+	for (i = 0; i < ZBUD_MAX_BUDS; i++)
+		if (offset == offsetof(typeof(*zbpg), buddy[i])) {
+			budnum = i;
+			break;
+		}
+	BUG_ON(budnum == -1U);
+	return budnum;
+}
+
+static char *zbud_data(struct zbud_hdr *zh, unsigned size)
+{
+	struct zbud_page *zbpg;
+	char *p;
+	unsigned budnum;
+
+	ASSERT_SENTINEL(zh, ZBH);
+	budnum = zbud_budnum(zh);
+	BUG_ON(size == 0 || size > zbud_max_buddy_size());
+	zbpg = container_of(zh, struct zbud_page, buddy[budnum]);
+	ASSERT_SPINLOCK(&zbpg->lock);
+	p = (char *)zbpg;
+	if (budnum == 0)
+		p += ((sizeof(struct zbud_page) + CHUNK_SIZE - 1) &
+							CHUNK_MASK);
+	else if (budnum == 1)
+		p += PAGE_SIZE - ((size + CHUNK_SIZE - 1) & CHUNK_MASK);
+	return p;
+}
+
+/*
+ * zbud raw page management
+ */
+
+static struct zbud_page *zbud_alloc_raw_page(void)
+{
+	struct zbud_page *zbpg = NULL;
+	struct zbud_hdr *zh0, *zh1;
+	bool recycled = 0;
+
+	/* if any pages on the zbpg list, use one */
+	spin_lock(&zbpg_unused_list_spinlock);
+	if (!list_empty(&zbpg_unused_list)) {
+		zbpg = list_first_entry(&zbpg_unused_list,
+				struct zbud_page, bud_list);
+		list_del_init(&zbpg->bud_list);
+		zcache_zbpg_unused_list_count--;
+		recycled = 1;
+	}
+	spin_unlock(&zbpg_unused_list_spinlock);
+	if (zbpg == NULL)
+		/* none on zbpg list, try to get a kernel page */
+		zbpg = zcache_get_free_page();
+	if (likely(zbpg != NULL)) {
+		INIT_LIST_HEAD(&zbpg->bud_list);
+		zh0 = &zbpg->buddy[0]; zh1 = &zbpg->buddy[1];
+		spin_lock_init(&zbpg->lock);
+		if (recycled) {
+			ASSERT_INVERTED_SENTINEL(zbpg, ZBPG);
+			SET_SENTINEL(zbpg, ZBPG);
+			BUG_ON(zh0->size != 0 || tmem_oid_valid(&zh0->oid));
+			BUG_ON(zh1->size != 0 || tmem_oid_valid(&zh1->oid));
+		} else {
+			atomic_inc(&zcache_zbud_curr_raw_pages);
+			INIT_LIST_HEAD(&zbpg->bud_list);
+			SET_SENTINEL(zbpg, ZBPG);
+			zh0->size = 0; zh1->size = 0;
+			tmem_oid_set_invalid(&zh0->oid);
+			tmem_oid_set_invalid(&zh1->oid);
+		}
+	}
+	return zbpg;
+}
+
+static void zbud_free_raw_page(struct zbud_page *zbpg)
+{
+	struct zbud_hdr *zh0 = &zbpg->buddy[0], *zh1 = &zbpg->buddy[1];
+
+	ASSERT_SENTINEL(zbpg, ZBPG);
+	BUG_ON(!list_empty(&zbpg->bud_list));
+	ASSERT_SPINLOCK(&zbpg->lock);
+	BUG_ON(zh0->size != 0 || tmem_oid_valid(&zh0->oid));
+	BUG_ON(zh1->size != 0 || tmem_oid_valid(&zh1->oid));
+	INVERT_SENTINEL(zbpg, ZBPG);
+	spin_unlock(&zbpg->lock);
+	spin_lock(&zbpg_unused_list_spinlock);
+	list_add(&zbpg->bud_list, &zbpg_unused_list);
+	zcache_zbpg_unused_list_count++;
+	spin_unlock(&zbpg_unused_list_spinlock);
+}
+
+/*
+ * core zbud handling routines
+ */
+
+static unsigned zbud_free(struct zbud_hdr *zh)
+{
+	unsigned size;
+
+	ASSERT_SENTINEL(zh, ZBH);
+	BUG_ON(!tmem_oid_valid(&zh->oid));
+	size = zh->size;
+	BUG_ON(zh->size == 0 || zh->size > zbud_max_buddy_size());
+	zh->size = 0;
+	tmem_oid_set_invalid(&zh->oid);
+	INVERT_SENTINEL(zh, ZBH);
+	zcache_zbud_curr_zbytes -= size;
+	atomic_dec(&zcache_zbud_curr_zpages);
+	return size;
+}
+
+static void zbud_free_and_delist(struct zbud_hdr *zh)
+{
+	unsigned chunks;
+	struct zbud_hdr *zh_other;
+	unsigned budnum = zbud_budnum(zh), size;
+	struct zbud_page *zbpg =
+		container_of(zh, struct zbud_page, buddy[budnum]);
+
+	spin_lock(&zbpg->lock);
+	if (list_empty(&zbpg->bud_list)) {
+		/* ignore zombie page... see zbud_evict_pages() */
+		spin_unlock(&zbpg->lock);
+		return;
+	}
+	size = zbud_free(zh);
+	ASSERT_SPINLOCK(&zbpg->lock);
+	zh_other = &zbpg->buddy[(budnum == 0) ? 1 : 0];
+	if (zh_other->size == 0) { /* was unbuddied: unlist and free */
+		chunks = zbud_size_to_chunks(size) ;
+		spin_lock(&zbud_budlists_spinlock);
+		BUG_ON(list_empty(&zbud_unbuddied[chunks].list));
+		list_del_init(&zbpg->bud_list);
+		zbud_unbuddied[chunks].count--;
+		spin_unlock(&zbud_budlists_spinlock);
+		zbud_free_raw_page(zbpg);
+	} else { /* was buddied: move remaining buddy to unbuddied list */
+		chunks = zbud_size_to_chunks(zh_other->size) ;
+		spin_lock(&zbud_budlists_spinlock);
+		list_del_init(&zbpg->bud_list);
+		zcache_zbud_buddied_count--;
+		list_add_tail(&zbpg->bud_list, &zbud_unbuddied[chunks].list);
+		zbud_unbuddied[chunks].count++;
+		spin_unlock(&zbud_budlists_spinlock);
+		spin_unlock(&zbpg->lock);
+	}
+}
+
+static struct zbud_hdr *zbud_create(uint32_t pool_id, struct tmem_oid *oid,
+					uint32_t index, struct page *page,
+					void *cdata, unsigned size)
+{
+	struct zbud_hdr *zh0, *zh1, *zh = NULL;
+	struct zbud_page *zbpg = NULL, *ztmp;
+	unsigned nchunks;
+	char *to;
+	int i, found_good_buddy = 0;
+
+	nchunks = zbud_size_to_chunks(size) ;
+	for (i = MAX_CHUNK - nchunks + 1; i > 0; i--) {
+		spin_lock(&zbud_budlists_spinlock);
+		if (!list_empty(&zbud_unbuddied[i].list)) {
+			list_for_each_entry_safe(zbpg, ztmp,
+				    &zbud_unbuddied[i].list, bud_list) {
+				if (spin_trylock(&zbpg->lock)) {
+					found_good_buddy = i;
+					goto found_unbuddied;
+				}
+			}
+		}
+		spin_unlock(&zbud_budlists_spinlock);
+	}
+	/* didn't find a good buddy, try allocating a new page */
+	zbpg = zbud_alloc_raw_page();
+	if (unlikely(zbpg == NULL))
+		goto out;
+	/* ok, have a page, now compress the data before taking locks */
+	spin_lock(&zbpg->lock);
+	spin_lock(&zbud_budlists_spinlock);
+	list_add_tail(&zbpg->bud_list, &zbud_unbuddied[nchunks].list);
+	zbud_unbuddied[nchunks].count++;
+	zh = &zbpg->buddy[0];
+	goto init_zh;
+
+found_unbuddied:
+	ASSERT_SPINLOCK(&zbpg->lock);
+	zh0 = &zbpg->buddy[0]; zh1 = &zbpg->buddy[1];
+	BUG_ON(!((zh0->size == 0) ^ (zh1->size == 0)));
+	if (zh0->size != 0) { /* buddy0 in use, buddy1 is vacant */
+		ASSERT_SENTINEL(zh0, ZBH);
+		zh = zh1;
+	} else if (zh1->size != 0) { /* buddy1 in use, buddy0 is vacant */
+		ASSERT_SENTINEL(zh1, ZBH);
+		zh = zh0;
+	} else
+		BUG();
+	list_del_init(&zbpg->bud_list);
+	zbud_unbuddied[found_good_buddy].count--;
+	list_add_tail(&zbpg->bud_list, &zbud_buddied_list);
+	zcache_zbud_buddied_count++;
+
+init_zh:
+	SET_SENTINEL(zh, ZBH);
+	zh->size = size;
+	zh->index = index;
+	zh->oid = *oid;
+	zh->pool_id = pool_id;
+	/* can wait to copy the data until the list locks are dropped */
+	spin_unlock(&zbud_budlists_spinlock);
+
+	to = zbud_data(zh, size);
+	memcpy(to, cdata, size);
+	spin_unlock(&zbpg->lock);
+	zbud_cumul_chunk_counts[nchunks]++;
+	atomic_inc(&zcache_zbud_curr_zpages);
+	zcache_zbud_cumul_zpages++;
+	zcache_zbud_curr_zbytes += size;
+	zcache_zbud_cumul_zbytes += size;
+out:
+	return zh;
+}
+
+static int zbud_decompress(struct page *page, struct zbud_hdr *zh)
+{
+	struct zbud_page *zbpg;
+	unsigned budnum = zbud_budnum(zh);
+	size_t out_len = PAGE_SIZE;
+	char *to_va, *from_va;
+	unsigned size;
+	int ret = 0;
+
+	zbpg = container_of(zh, struct zbud_page, buddy[budnum]);
+	spin_lock(&zbpg->lock);
+	if (list_empty(&zbpg->bud_list)) {
+		/* ignore zombie page... see zbud_evict_pages() */
+		ret = -EINVAL;
+		goto out;
+	}
+	ASSERT_SENTINEL(zh, ZBH);
+	BUG_ON(zh->size == 0 || zh->size > zbud_max_buddy_size());
+	to_va = kmap_atomic(page, KM_USER0);
+	size = zh->size;
+	from_va = zbud_data(zh, size);
+	ret = lzo1x_decompress_safe(from_va, size, to_va, &out_len);
+	BUG_ON(ret != LZO_E_OK);
+	BUG_ON(out_len != PAGE_SIZE);
+	kunmap_atomic(to_va, KM_USER0);
+out:
+	spin_unlock(&zbpg->lock);
+	return ret;
+}
+
+/*
+ * The following routines handle shrinking of ephemeral pages by evicting
+ * pages "least valuable" first.
+ */
+
+static unsigned long zcache_evicted_raw_pages;
+static unsigned long zcache_evicted_buddied_pages;
+static unsigned long zcache_evicted_unbuddied_pages;
+
+static struct tmem_pool *zcache_get_pool_by_id(uint32_t poolid);
+static void zcache_put_pool(struct tmem_pool *pool);
+
+/*
+ * Flush and free all zbuds in a zbpg, then free the pageframe
+ */
+static void zbud_evict_zbpg(struct zbud_page *zbpg)
+{
+	struct zbud_hdr *zh;
+	int i, j;
+	uint32_t pool_id[ZBUD_MAX_BUDS], index[ZBUD_MAX_BUDS];
+	struct tmem_oid oid[ZBUD_MAX_BUDS];
+	struct tmem_pool *pool;
+
+	ASSERT_SPINLOCK(&zbpg->lock);
+	BUG_ON(!list_empty(&zbpg->bud_list));
+	for (i = 0, j = 0; i < ZBUD_MAX_BUDS; i++) {
+		zh = &zbpg->buddy[i];
+		if (zh->size) {
+			pool_id[j] = zh->pool_id;
+			oid[j] = zh->oid;
+			index[j] = zh->index;
+			j++;
+			zbud_free(zh);
+		}
+	}
+	spin_unlock(&zbpg->lock);
+	for (i = 0; i < j; i++) {
+		pool = zcache_get_pool_by_id(pool_id[i]);
+		if (pool != NULL) {
+			tmem_flush_page(pool, &oid[i], index[i]);
+			zcache_put_pool(pool);
+		}
+	}
+	ASSERT_SENTINEL(zbpg, ZBPG);
+	spin_lock(&zbpg->lock);
+	zbud_free_raw_page(zbpg);
+}
+
+/*
+ * Free nr pages.  This code is funky because we want to hold the locks
+ * protecting various lists for as short a time as possible, and in some
+ * circumstances the list may change asynchronously when the list lock is
+ * not held.  In some cases we also trylock not only to avoid waiting on a
+ * page in use by another cpu, but also to avoid potential deadlock due to
+ * lock inversion.
+ */
+static void zbud_evict_pages(int nr)
+{
+	struct zbud_page *zbpg;
+	int i;
+
+	/* first try freeing any pages on unused list */
+retry_unused_list:
+	spin_lock_bh(&zbpg_unused_list_spinlock);
+	if (!list_empty(&zbpg_unused_list)) {
+		/* can't walk list here, since it may change when unlocked */
+		zbpg = list_first_entry(&zbpg_unused_list,
+				struct zbud_page, bud_list);
+		list_del_init(&zbpg->bud_list);
+		zcache_zbpg_unused_list_count--;
+		atomic_dec(&zcache_zbud_curr_raw_pages);
+		spin_unlock_bh(&zbpg_unused_list_spinlock);
+		zcache_free_page(zbpg);
+		zcache_evicted_raw_pages++;
+		if (--nr <= 0)
+			goto out;
+		goto retry_unused_list;
+	}
+	spin_unlock_bh(&zbpg_unused_list_spinlock);
+
+	/* now try freeing unbuddied pages, starting with least space avail */
+	for (i = 0; i < MAX_CHUNK; i++) {
+retry_unbud_list_i:
+		spin_lock_bh(&zbud_budlists_spinlock);
+		if (list_empty(&zbud_unbuddied[i].list)) {
+			spin_unlock_bh(&zbud_budlists_spinlock);
+			continue;
+		}
+		list_for_each_entry(zbpg, &zbud_unbuddied[i].list, bud_list) {
+			if (unlikely(!spin_trylock(&zbpg->lock)))
+				continue;
+			list_del_init(&zbpg->bud_list);
+			zbud_unbuddied[i].count--;
+			spin_unlock(&zbud_budlists_spinlock);
+			zcache_evicted_unbuddied_pages++;
+			/* want budlists unlocked when doing zbpg eviction */
+			zbud_evict_zbpg(zbpg);
+			local_bh_enable();
+			if (--nr <= 0)
+				goto out;
+			goto retry_unbud_list_i;
+		}
+		spin_unlock_bh(&zbud_budlists_spinlock);
+	}
+
+	/* as a last resort, free buddied pages */
+retry_bud_list:
+	spin_lock_bh(&zbud_budlists_spinlock);
+	if (list_empty(&zbud_buddied_list)) {
+		spin_unlock_bh(&zbud_budlists_spinlock);
+		goto out;
+	}
+	list_for_each_entry(zbpg, &zbud_buddied_list, bud_list) {
+		if (unlikely(!spin_trylock(&zbpg->lock)))
+			continue;
+		list_del_init(&zbpg->bud_list);
+		zcache_zbud_buddied_count--;
+		spin_unlock(&zbud_budlists_spinlock);
+		zcache_evicted_buddied_pages++;
+		/* want budlists unlocked when doing zbpg eviction */
+		zbud_evict_zbpg(zbpg);
+		local_bh_enable();
+		if (--nr <= 0)
+			goto out;
+		goto retry_bud_list;
+	}
+	spin_unlock_bh(&zbud_budlists_spinlock);
+out:
+	return;
+}
+
+static void zbud_init(void)
+{
+	int i;
+
+	INIT_LIST_HEAD(&zbud_buddied_list);
+	zcache_zbud_buddied_count = 0;
+	for (i = 0; i < NCHUNKS; i++) {
+		INIT_LIST_HEAD(&zbud_unbuddied[i].list);
+		zbud_unbuddied[i].count = 0;
+	}
+}
+
+#ifdef CONFIG_SYSFS
+/*
+ * These sysfs routines show a nice distribution of how many zbpg's are
+ * currently (and have ever been placed) in each unbuddied list.  It's fun
+ * to watch but can probably go away before final merge.
+ */
+static int zbud_show_unbuddied_list_counts(char *buf)
+{
+	int i;
+	char *p = buf;
+
+	for (i = 0; i < NCHUNKS - 1; i++)
+		p += sprintf(p, "%u ", zbud_unbuddied[i].count);
+	p += sprintf(p, "%d\n", zbud_unbuddied[i].count);
+	return p - buf;
+}
+
+static int zbud_show_cumul_chunk_counts(char *buf)
+{
+	unsigned long i, chunks = 0, total_chunks = 0, sum_total_chunks = 0;
+	unsigned long total_chunks_lte_21 = 0, total_chunks_lte_32 = 0;
+	unsigned long total_chunks_lte_42 = 0;
+	char *p = buf;
+
+	for (i = 0; i < NCHUNKS; i++) {
+		p += sprintf(p, "%lu ", zbud_cumul_chunk_counts[i]);
+		chunks += zbud_cumul_chunk_counts[i];
+		total_chunks += zbud_cumul_chunk_counts[i];
+		sum_total_chunks += i * zbud_cumul_chunk_counts[i];
+		if (i == 21)
+			total_chunks_lte_21 = total_chunks;
+		if (i == 32)
+			total_chunks_lte_32 = total_chunks;
+		if (i == 42)
+			total_chunks_lte_42 = total_chunks;
+	}
+	p += sprintf(p, "<=21:%lu <=32:%lu <=42:%lu, mean:%lu\n",
+		total_chunks_lte_21, total_chunks_lte_32, total_chunks_lte_42,
+		chunks == 0 ? 0 : sum_total_chunks / chunks);
+	return p - buf;
+}
+#endif
+
+/**********
+ * This "zv" PAM implementation combines the TLSF-based xvMalloc
+ * with lzo1x compression to maximize the amount of data that can
+ * be packed into a physical page.
+ *
+ * Zv represents a PAM page with the index and object (plus a "size" value
+ * necessary for decompression) immediately preceding the compressed data.
+ */
+
+#define ZVH_SENTINEL  0x43214321
+
+struct zv_hdr {
+	uint32_t pool_id;
+	struct tmem_oid oid;
+	uint32_t index;
+	DECL_SENTINEL
+};
+
+static const int zv_max_page_size = (PAGE_SIZE / 8) * 7;
+
+static struct zv_hdr *zv_create(struct xv_pool *xvpool, uint32_t pool_id,
+				struct tmem_oid *oid, uint32_t index,
+				void *cdata, unsigned clen)
+{
+	struct page *page;
+	struct zv_hdr *zv = NULL;
+	uint32_t offset;
+	int ret;
+
+	BUG_ON(!irqs_disabled());
+	ret = xv_malloc(xvpool, clen + sizeof(struct zv_hdr),
+			&page, &offset, ZCACHE_GFP_MASK);
+	if (unlikely(ret))
+		goto out;
+	zv = kmap_atomic(page, KM_USER0) + offset;
+	zv->index = index;
+	zv->oid = *oid;
+	zv->pool_id = pool_id;
+	SET_SENTINEL(zv, ZVH);
+	memcpy((char *)zv + sizeof(struct zv_hdr), cdata, clen);
+	kunmap_atomic(zv, KM_USER0);
+out:
+	return zv;
+}
+
+static void zv_free(struct xv_pool *xvpool, struct zv_hdr *zv)
+{
+	unsigned long flags;
+	struct page *page;
+	uint32_t offset;
+	uint16_t size;
+
+	ASSERT_SENTINEL(zv, ZVH);
+	size = xv_get_object_size(zv) - sizeof(*zv);
+	BUG_ON(size == 0 || size > zv_max_page_size);
+	INVERT_SENTINEL(zv, ZVH);
+	page = virt_to_page(zv);
+	offset = (unsigned long)zv & ~PAGE_MASK;
+	local_irq_save(flags);
+	xv_free(xvpool, page, offset);
+	local_irq_restore(flags);
+}
+
+static void zv_decompress(struct page *page, struct zv_hdr *zv)
+{
+	size_t clen = PAGE_SIZE;
+	char *to_va;
+	unsigned size;
+	int ret;
+
+	ASSERT_SENTINEL(zv, ZVH);
+	size = xv_get_object_size(zv) - sizeof(*zv);
+	BUG_ON(size == 0 || size > zv_max_page_size);
+	to_va = kmap_atomic(page, KM_USER0);
+	ret = lzo1x_decompress_safe((char *)zv + sizeof(*zv),
+					size, to_va, &clen);
+	kunmap_atomic(to_va, KM_USER0);
+	BUG_ON(ret != LZO_E_OK);
+	BUG_ON(clen != PAGE_SIZE);
+}
+
+/*
+ * zcache core code starts here
+ */
+
+/* useful stats not collected by cleancache or frontswap */
+static unsigned long zcache_flush_total;
+static unsigned long zcache_flush_found;
+static unsigned long zcache_flobj_total;
+static unsigned long zcache_flobj_found;
+static unsigned long zcache_failed_eph_puts;
+static unsigned long zcache_failed_pers_puts;
+
+#define MAX_POOLS_PER_CLIENT 16
+
+static struct {
+	struct tmem_pool *tmem_pools[MAX_POOLS_PER_CLIENT];
+	struct xv_pool *xvpool;
+} zcache_client;
+
+/*
+ * Tmem operations assume the poolid implies the invoking client.
+ * Zcache only has one client (the kernel itself), so translate
+ * the poolid into the tmem_pool allocated for it.  A KVM version
+ * of zcache would have one client per guest and each client might
+ * have a poolid==N.
+ */
+static struct tmem_pool *zcache_get_pool_by_id(uint32_t poolid)
+{
+	struct tmem_pool *pool = NULL;
+
+	if (poolid >= 0) {
+		pool = zcache_client.tmem_pools[poolid];
+		if (pool != NULL)
+			atomic_inc(&pool->refcount);
+	}
+	return pool;
+}
+
+static void zcache_put_pool(struct tmem_pool *pool)
+{
+	if (pool != NULL)
+		atomic_dec(&pool->refcount);
+}
+
+/* counters for debugging */
+static unsigned long zcache_failed_get_free_pages;
+static unsigned long zcache_failed_alloc;
+static unsigned long zcache_put_to_flush;
+static unsigned long zcache_aborted_preload;
+static unsigned long zcache_aborted_shrink;
+
+/*
+ * Ensure that memory allocation requests in zcache don't result
+ * in direct reclaim requests via the shrinker, which would cause
+ * an infinite loop.  Maybe a GFP flag would be better?
+ */
+static DEFINE_SPINLOCK(zcache_direct_reclaim_lock);
+
+/*
+ * for now, used named slabs so can easily track usage; later can
+ * either just use kmalloc, or perhaps add a slab-like allocator
+ * to more carefully manage total memory utilization
+ */
+static struct kmem_cache *zcache_objnode_cache;
+static struct kmem_cache *zcache_obj_cache;
+static atomic_t zcache_curr_obj_count = ATOMIC_INIT(0);
+static unsigned long zcache_curr_obj_count_max;
+static atomic_t zcache_curr_objnode_count = ATOMIC_INIT(0);
+static unsigned long zcache_curr_objnode_count_max;
+
+/*
+ * to avoid memory allocation recursion (e.g. due to direct reclaim), we
+ * preload all necessary data structures so the hostops callbacks never
+ * actually do a malloc
+ */
+struct zcache_preload {
+	void *page;
+	struct tmem_obj *obj;
+	int nr;
+	struct tmem_objnode *objnodes[OBJNODE_TREE_MAX_PATH];
+};
+static DEFINE_PER_CPU(struct zcache_preload, zcache_preloads) = { 0, };
+
+static int zcache_do_preload(struct tmem_pool *pool)
+{
+	struct zcache_preload *kp;
+	struct tmem_objnode *objnode;
+	struct tmem_obj *obj;
+	void *page;
+	int ret = -ENOMEM;
+
+	if (unlikely(zcache_objnode_cache == NULL))
+		goto out;
+	if (unlikely(zcache_obj_cache == NULL))
+		goto out;
+	if (!spin_trylock(&zcache_direct_reclaim_lock)) {
+		zcache_aborted_preload++;
+		goto out;
+	}
+	preempt_disable();
+	kp = &__get_cpu_var(zcache_preloads);
+	while (kp->nr < ARRAY_SIZE(kp->objnodes)) {
+		preempt_enable_no_resched();
+		objnode = kmem_cache_alloc(zcache_objnode_cache,
+				ZCACHE_GFP_MASK);
+		if (unlikely(objnode == NULL)) {
+			zcache_failed_alloc++;
+			goto unlock_out;
+		}
+		preempt_disable();
+		kp = &__get_cpu_var(zcache_preloads);
+		if (kp->nr < ARRAY_SIZE(kp->objnodes))
+			kp->objnodes[kp->nr++] = objnode;
+		else
+			kmem_cache_free(zcache_objnode_cache, objnode);
+	}
+	preempt_enable_no_resched();
+	obj = kmem_cache_alloc(zcache_obj_cache, ZCACHE_GFP_MASK);
+	if (unlikely(obj == NULL)) {
+		zcache_failed_alloc++;
+		goto unlock_out;
+	}
+	page = (void *)__get_free_page(ZCACHE_GFP_MASK);
+	if (unlikely(page == NULL)) {
+		zcache_failed_get_free_pages++;
+		kmem_cache_free(zcache_obj_cache, obj);
+		goto unlock_out;
+	}
+	preempt_disable();
+	kp = &__get_cpu_var(zcache_preloads);
+	if (kp->obj == NULL)
+		kp->obj = obj;
+	else
+		kmem_cache_free(zcache_obj_cache, obj);
+	if (kp->page == NULL)
+		kp->page = page;
+	else
+		free_page((unsigned long)page);
+	ret = 0;
+unlock_out:
+	spin_unlock(&zcache_direct_reclaim_lock);
+out:
+	return ret;
+}
+
+static void *zcache_get_free_page(void)
+{
+	struct zcache_preload *kp;
+	void *page;
+
+	kp = &__get_cpu_var(zcache_preloads);
+	page = kp->page;
+	BUG_ON(page == NULL);
+	kp->page = NULL;
+	return page;
+}
+
+static void zcache_free_page(void *p)
+{
+	free_page((unsigned long)p);
+}
+
+/*
+ * zcache implementation for tmem host ops
+ */
+
+static struct tmem_objnode *zcache_objnode_alloc(struct tmem_pool *pool)
+{
+	struct tmem_objnode *objnode = NULL;
+	unsigned long count;
+	struct zcache_preload *kp;
+
+	kp = &__get_cpu_var(zcache_preloads);
+	if (kp->nr <= 0)
+		goto out;
+	objnode = kp->objnodes[kp->nr - 1];
+	BUG_ON(objnode == NULL);
+	kp->objnodes[kp->nr - 1] = NULL;
+	kp->nr--;
+	count = atomic_inc_return(&zcache_curr_objnode_count);
+	if (count > zcache_curr_objnode_count_max)
+		zcache_curr_objnode_count_max = count;
+out:
+	return objnode;
+}
+
+static void zcache_objnode_free(struct tmem_objnode *objnode,
+					struct tmem_pool *pool)
+{
+	atomic_dec(&zcache_curr_objnode_count);
+	BUG_ON(atomic_read(&zcache_curr_objnode_count) < 0);
+	kmem_cache_free(zcache_objnode_cache, objnode);
+}
+
+static struct tmem_obj *zcache_obj_alloc(struct tmem_pool *pool)
+{
+	struct tmem_obj *obj = NULL;
+	unsigned long count;
+	struct zcache_preload *kp;
+
+	kp = &__get_cpu_var(zcache_preloads);
+	obj = kp->obj;
+	BUG_ON(obj == NULL);
+	kp->obj = NULL;
+	count = atomic_inc_return(&zcache_curr_obj_count);
+	if (count > zcache_curr_obj_count_max)
+		zcache_curr_obj_count_max = count;
+	return obj;
+}
+
+static void zcache_obj_free(struct tmem_obj *obj, struct tmem_pool *pool)
+{
+	atomic_dec(&zcache_curr_obj_count);
+	BUG_ON(atomic_read(&zcache_curr_obj_count) < 0);
+	kmem_cache_free(zcache_obj_cache, obj);
+}
+
+static struct tmem_hostops zcache_hostops = {
+	.obj_alloc = zcache_obj_alloc,
+	.obj_free = zcache_obj_free,
+	.objnode_alloc = zcache_objnode_alloc,
+	.objnode_free = zcache_objnode_free,
+};
+
+/*
+ * zcache implementations for PAM page descriptor ops
+ */
+
+static atomic_t zcache_curr_eph_pampd_count = ATOMIC_INIT(0);
+static unsigned long zcache_curr_eph_pampd_count_max;
+static atomic_t zcache_curr_pers_pampd_count = ATOMIC_INIT(0);
+static unsigned long zcache_curr_pers_pampd_count_max;
+
+/* forward reference */
+static int zcache_compress(struct page *from, void **out_va, size_t *out_len);
+
+static void *zcache_pampd_create(struct tmem_pool *pool, struct tmem_oid *oid,
+				 uint32_t index, struct page *page)
+{
+	void *pampd = NULL, *cdata;
+	size_t clen;
+	int ret;
+	bool ephemeral = is_ephemeral(pool);
+	unsigned long count;
+
+	if (ephemeral) {
+		ret = zcache_compress(page, &cdata, &clen);
+		if (ret == 0)
+
+			goto out;
+		if (clen == 0 || clen > zbud_max_buddy_size()) {
+			zcache_compress_poor++;
+			goto out;
+		}
+		pampd = (void *)zbud_create(pool->pool_id, oid, index,
+						page, cdata, clen);
+		if (pampd != NULL) {
+			count = atomic_inc_return(&zcache_curr_eph_pampd_count);
+			if (count > zcache_curr_eph_pampd_count_max)
+				zcache_curr_eph_pampd_count_max = count;
+		}
+	} else {
+		/*
+		 * FIXME: This is all the "policy" there is for now.
+		 * 3/4 totpages should allow ~37% of RAM to be filled with
+		 * compressed frontswap pages
+		 */
+		if (atomic_read(&zcache_curr_pers_pampd_count) >
+							3 * totalram_pages / 4)
+			goto out;
+		ret = zcache_compress(page, &cdata, &clen);
+		if (ret == 0)
+			goto out;
+		if (clen > zv_max_page_size) {
+			zcache_compress_poor++;
+			goto out;
+		}
+		pampd = (void *)zv_create(zcache_client.xvpool, pool->pool_id,
+						oid, index, cdata, clen);
+		if (pampd == NULL)
+			goto out;
+		count = atomic_inc_return(&zcache_curr_pers_pampd_count);
+		if (count > zcache_curr_pers_pampd_count_max)
+			zcache_curr_pers_pampd_count_max = count;
+	}
+out:
+	return pampd;
+}
+
+/*
+ * fill the pageframe corresponding to the struct page with the data
+ * from the passed pampd
+ */
+static int zcache_pampd_get_data(struct page *page, void *pampd,
+						struct tmem_pool *pool)
+{
+	int ret = 0;
+
+	if (is_ephemeral(pool))
+		ret = zbud_decompress(page, pampd);
+	else
+		zv_decompress(page, pampd);
+	return ret;
+}
+
+/*
+ * free the pampd and remove it from any zcache lists
+ * pampd must no longer be pointed to from any tmem data structures!
+ */
+static void zcache_pampd_free(void *pampd, struct tmem_pool *pool)
+{
+	if (is_ephemeral(pool)) {
+		zbud_free_and_delist((struct zbud_hdr *)pampd);
+		atomic_dec(&zcache_curr_eph_pampd_count);
+		BUG_ON(atomic_read(&zcache_curr_eph_pampd_count) < 0);
+	} else {
+		zv_free(zcache_client.xvpool, (struct zv_hdr *)pampd);
+		atomic_dec(&zcache_curr_pers_pampd_count);
+		BUG_ON(atomic_read(&zcache_curr_pers_pampd_count) < 0);
+	}
+}
+
+static struct tmem_pamops zcache_pamops = {
+	.create = zcache_pampd_create,
+	.get_data = zcache_pampd_get_data,
+	.free = zcache_pampd_free,
+};
+
+/*
+ * zcache compression/decompression and related per-cpu stuff
+ */
+
+#define LZO_WORKMEM_BYTES LZO1X_1_MEM_COMPRESS
+#define LZO_DSTMEM_PAGE_ORDER 1
+static DEFINE_PER_CPU(unsigned char *, zcache_workmem);
+static DEFINE_PER_CPU(unsigned char *, zcache_dstmem);
+
+static int zcache_compress(struct page *from, void **out_va, size_t *out_len)
+{
+	int ret = 0;
+	unsigned char *dmem = __get_cpu_var(zcache_dstmem);
+	unsigned char *wmem = __get_cpu_var(zcache_workmem);
+	char *from_va;
+
+	BUG_ON(!irqs_disabled());
+	if (unlikely(dmem == NULL || wmem == NULL))
+		goto out;  /* no buffer, so can't compress */
+	from_va = kmap_atomic(from, KM_USER0);
+	mb();
+	ret = lzo1x_1_compress(from_va, PAGE_SIZE, dmem, out_len, wmem);
+	BUG_ON(ret != LZO_E_OK);
+	*out_va = dmem;
+	kunmap_atomic(from_va, KM_USER0);
+	ret = 1;
+out:
+	return ret;
+}
+
+
+static int zcache_cpu_notifier(struct notifier_block *nb,
+				unsigned long action, void *pcpu)
+{
+	int cpu = (long)pcpu;
+	struct zcache_preload *kp;
+
+	switch (action) {
+	case CPU_UP_PREPARE:
+		per_cpu(zcache_dstmem, cpu) = (void *)__get_free_pages(
+			GFP_KERNEL | __GFP_REPEAT,
+			LZO_DSTMEM_PAGE_ORDER),
+		per_cpu(zcache_workmem, cpu) =
+			kzalloc(LZO1X_MEM_COMPRESS,
+				GFP_KERNEL | __GFP_REPEAT);
+		break;
+	case CPU_DEAD:
+	case CPU_UP_CANCELED:
+		free_pages((unsigned long)per_cpu(zcache_dstmem, cpu),
+				LZO_DSTMEM_PAGE_ORDER);
+		per_cpu(zcache_dstmem, cpu) = NULL;
+		kfree(per_cpu(zcache_workmem, cpu));
+		per_cpu(zcache_workmem, cpu) = NULL;
+		kp = &per_cpu(zcache_preloads, cpu);
+		while (kp->nr) {
+			kmem_cache_free(zcache_objnode_cache,
+					kp->objnodes[kp->nr - 1]);
+			kp->objnodes[kp->nr - 1] = NULL;
+			kp->nr--;
+		}
+		kmem_cache_free(zcache_obj_cache, kp->obj);
+		free_page((unsigned long)kp->page);
+		break;
+	default:
+		break;
+	}
+	return NOTIFY_OK;
+}
+
+static struct notifier_block zcache_cpu_notifier_block = {
+	.notifier_call = zcache_cpu_notifier
+};
+
+#ifdef CONFIG_SYSFS
+#define ZCACHE_SYSFS_RO(_name) \
+	static ssize_t zcache_##_name##_show(struct kobject *kobj, \
+				struct kobj_attribute *attr, char *buf) \
+	{ \
+		return sprintf(buf, "%lu\n", zcache_##_name); \
+	} \
+	static struct kobj_attribute zcache_##_name##_attr = { \
+		.attr = { .name = __stringify(_name), .mode = 0444 }, \
+		.show = zcache_##_name##_show, \
+	}
+
+#define ZCACHE_SYSFS_RO_ATOMIC(_name) \
+	static ssize_t zcache_##_name##_show(struct kobject *kobj, \
+				struct kobj_attribute *attr, char *buf) \
+	{ \
+	    return sprintf(buf, "%d\n", atomic_read(&zcache_##_name)); \
+	} \
+	static struct kobj_attribute zcache_##_name##_attr = { \
+		.attr = { .name = __stringify(_name), .mode = 0444 }, \
+		.show = zcache_##_name##_show, \
+	}
+
+#define ZCACHE_SYSFS_RO_CUSTOM(_name, _func) \
+	static ssize_t zcache_##_name##_show(struct kobject *kobj, \
+				struct kobj_attribute *attr, char *buf) \
+	{ \
+	    return _func(buf); \
+	} \
+	static struct kobj_attribute zcache_##_name##_attr = { \
+		.attr = { .name = __stringify(_name), .mode = 0444 }, \
+		.show = zcache_##_name##_show, \
+	}
+
+ZCACHE_SYSFS_RO(curr_obj_count_max);
+ZCACHE_SYSFS_RO(curr_objnode_count_max);
+ZCACHE_SYSFS_RO(flush_total);
+ZCACHE_SYSFS_RO(flush_found);
+ZCACHE_SYSFS_RO(flobj_total);
+ZCACHE_SYSFS_RO(flobj_found);
+ZCACHE_SYSFS_RO(failed_eph_puts);
+ZCACHE_SYSFS_RO(failed_pers_puts);
+ZCACHE_SYSFS_RO(zbud_curr_zbytes);
+ZCACHE_SYSFS_RO(zbud_cumul_zpages);
+ZCACHE_SYSFS_RO(zbud_cumul_zbytes);
+ZCACHE_SYSFS_RO(zbud_buddied_count);
+ZCACHE_SYSFS_RO(zbpg_unused_list_count);
+ZCACHE_SYSFS_RO(evicted_raw_pages);
+ZCACHE_SYSFS_RO(evicted_unbuddied_pages);
+ZCACHE_SYSFS_RO(evicted_buddied_pages);
+ZCACHE_SYSFS_RO(failed_get_free_pages);
+ZCACHE_SYSFS_RO(failed_alloc);
+ZCACHE_SYSFS_RO(put_to_flush);
+ZCACHE_SYSFS_RO(aborted_preload);
+ZCACHE_SYSFS_RO(aborted_shrink);
+ZCACHE_SYSFS_RO(compress_poor);
+ZCACHE_SYSFS_RO_ATOMIC(zbud_curr_raw_pages);
+ZCACHE_SYSFS_RO_ATOMIC(zbud_curr_zpages);
+ZCACHE_SYSFS_RO_ATOMIC(curr_obj_count);
+ZCACHE_SYSFS_RO_ATOMIC(curr_objnode_count);
+ZCACHE_SYSFS_RO_CUSTOM(zbud_unbuddied_list_counts,
+			zbud_show_unbuddied_list_counts);
+ZCACHE_SYSFS_RO_CUSTOM(zbud_cumul_chunk_counts,
+			zbud_show_cumul_chunk_counts);
+
+static struct attribute *zcache_attrs[] = {
+	&zcache_curr_obj_count_attr.attr,
+	&zcache_curr_obj_count_max_attr.attr,
+	&zcache_curr_objnode_count_attr.attr,
+	&zcache_curr_objnode_count_max_attr.attr,
+	&zcache_flush_total_attr.attr,
+	&zcache_flobj_total_attr.attr,
+	&zcache_flush_found_attr.attr,
+	&zcache_flobj_found_attr.attr,
+	&zcache_failed_eph_puts_attr.attr,
+	&zcache_failed_pers_puts_attr.attr,
+	&zcache_compress_poor_attr.attr,
+	&zcache_zbud_curr_raw_pages_attr.attr,
+	&zcache_zbud_curr_zpages_attr.attr,
+	&zcache_zbud_curr_zbytes_attr.attr,
+	&zcache_zbud_cumul_zpages_attr.attr,
+	&zcache_zbud_cumul_zbytes_attr.attr,
+	&zcache_zbud_buddied_count_attr.attr,
+	&zcache_zbpg_unused_list_count_attr.attr,
+	&zcache_evicted_raw_pages_attr.attr,
+	&zcache_evicted_unbuddied_pages_attr.attr,
+	&zcache_evicted_buddied_pages_attr.attr,
+	&zcache_failed_get_free_pages_attr.attr,
+	&zcache_failed_alloc_attr.attr,
+	&zcache_put_to_flush_attr.attr,
+	&zcache_aborted_preload_attr.attr,
+	&zcache_aborted_shrink_attr.attr,
+	&zcache_zbud_unbuddied_list_counts_attr.attr,
+	&zcache_zbud_cumul_chunk_counts_attr.attr,
+	NULL,
+};
+
+static struct attribute_group zcache_attr_group = {
+	.attrs = zcache_attrs,
+	.name = "zcache",
+};
+
+#endif /* CONFIG_SYSFS */
+/*
+ * When zcache is disabled ("frozen"), pools can be created and destroyed,
+ * but all puts (and thus all other operations that require memory allocation)
+ * must fail.  If zcache is unfrozen, accepts puts, then frozen again,
+ * data consistency requires all puts while frozen to be converted into
+ * flushes.
+ */
+static bool zcache_freeze;
+
+/*
+ * zcache shrinker interface (only useful for ephemeral pages, so zbud only)
+ */
+static int shrink_zcache_memory(struct shrinker *shrink,
+				struct shrink_control *sc)
+{
+	int ret = -1;
+	int nr = sc->nr_to_scan;
+	gfp_t gfp_mask = sc->gfp_mask;
+
+	if (nr >= 0) {
+		if (!(gfp_mask & __GFP_FS))
+			/* does this case really need to be skipped? */
+			goto out;
+		if (spin_trylock(&zcache_direct_reclaim_lock)) {
+			zbud_evict_pages(nr);
+			spin_unlock(&zcache_direct_reclaim_lock);
+		} else
+			zcache_aborted_shrink++;
+	}
+	ret = (int)atomic_read(&zcache_zbud_curr_raw_pages);
+out:
+	return ret;
+}
+
+static struct shrinker zcache_shrinker = {
+	.shrink = shrink_zcache_memory,
+	.seeks = DEFAULT_SEEKS,
+};
+
+/*
+ * zcache shims between cleancache/frontswap ops and tmem
+ */
+
+static int zcache_put_page(int pool_id, struct tmem_oid *oidp,
+				uint32_t index, struct page *page)
+{
+	struct tmem_pool *pool;
+	int ret = -1;
+
+	BUG_ON(!irqs_disabled());
+	pool = zcache_get_pool_by_id(pool_id);
+	if (unlikely(pool == NULL))
+		goto out;
+	if (!zcache_freeze && zcache_do_preload(pool) == 0) {
+		/* preload does preempt_disable on success */
+		ret = tmem_put(pool, oidp, index, page);
+		if (ret < 0) {
+			if (is_ephemeral(pool))
+				zcache_failed_eph_puts++;
+			else
+				zcache_failed_pers_puts++;
+		}
+		zcache_put_pool(pool);
+		preempt_enable_no_resched();
+	} else {
+		zcache_put_to_flush++;
+		if (atomic_read(&pool->obj_count) > 0)
+			/* the put fails whether the flush succeeds or not */
+			(void)tmem_flush_page(pool, oidp, index);
+		zcache_put_pool(pool);
+	}
+out:
+	return ret;
+}
+
+static int zcache_get_page(int pool_id, struct tmem_oid *oidp,
+				uint32_t index, struct page *page)
+{
+	struct tmem_pool *pool;
+	int ret = -1;
+	unsigned long flags;
+
+	local_irq_save(flags);
+	pool = zcache_get_pool_by_id(pool_id);
+	if (likely(pool != NULL)) {
+		if (atomic_read(&pool->obj_count) > 0)
+			ret = tmem_get(pool, oidp, index, page);
+		zcache_put_pool(pool);
+	}
+	local_irq_restore(flags);
+	return ret;
+}
+
+static int zcache_flush_page(int pool_id, struct tmem_oid *oidp, uint32_t index)
+{
+	struct tmem_pool *pool;
+	int ret = -1;
+	unsigned long flags;
+
+	local_irq_save(flags);
+	zcache_flush_total++;
+	pool = zcache_get_pool_by_id(pool_id);
+	if (likely(pool != NULL)) {
+		if (atomic_read(&pool->obj_count) > 0)
+			ret = tmem_flush_page(pool, oidp, index);
+		zcache_put_pool(pool);
+	}
+	if (ret >= 0)
+		zcache_flush_found++;
+	local_irq_restore(flags);
+	return ret;
+}
+
+static int zcache_flush_object(int pool_id, struct tmem_oid *oidp)
+{
+	struct tmem_pool *pool;
+	int ret = -1;
+	unsigned long flags;
+
+	local_irq_save(flags);
+	zcache_flobj_total++;
+	pool = zcache_get_pool_by_id(pool_id);
+	if (likely(pool != NULL)) {
+		if (atomic_read(&pool->obj_count) > 0)
+			ret = tmem_flush_object(pool, oidp);
+		zcache_put_pool(pool);
+	}
+	if (ret >= 0)
+		zcache_flobj_found++;
+	local_irq_restore(flags);
+	return ret;
+}
+
+static int zcache_destroy_pool(int pool_id)
+{
+	struct tmem_pool *pool = NULL;
+	int ret = -1;
+
+	if (pool_id < 0)
+		goto out;
+	pool = zcache_client.tmem_pools[pool_id];
+	if (pool == NULL)
+		goto out;
+	zcache_client.tmem_pools[pool_id] = NULL;
+	/* wait for pool activity on other cpus to quiesce */
+	while (atomic_read(&pool->refcount) != 0)
+		;
+	local_bh_disable();
+	ret = tmem_destroy_pool(pool);
+	local_bh_enable();
+	kfree(pool);
+	pr_info("zcache: destroyed pool id=%d\n", pool_id);
+out:
+	return ret;
+}
+
+static int zcache_new_pool(uint32_t flags)
+{
+	int poolid = -1;
+	struct tmem_pool *pool;
+
+	pool = kmalloc(sizeof(struct tmem_pool), GFP_KERNEL);
+	if (pool == NULL) {
+		pr_info("zcache: pool creation failed: out of memory\n");
+		goto out;
+	}
+
+	for (poolid = 0; poolid < MAX_POOLS_PER_CLIENT; poolid++)
+		if (zcache_client.tmem_pools[poolid] == NULL)
+			break;
+	if (poolid >= MAX_POOLS_PER_CLIENT) {
+		pr_info("zcache: pool creation failed: max exceeded\n");
+		kfree(pool);
+		poolid = -1;
+		goto out;
+	}
+	atomic_set(&pool->refcount, 0);
+	pool->client = &zcache_client;
+	pool->pool_id = poolid;
+	tmem_new_pool(pool, flags);
+	zcache_client.tmem_pools[poolid] = pool;
+	pr_info("zcache: created %s tmem pool, id=%d\n",
+		flags & TMEM_POOL_PERSIST ? "persistent" : "ephemeral",
+		poolid);
+out:
+	return poolid;
+}
+
+/**********
+ * Two kernel functionalities currently can be layered on top of tmem.
+ * These are "cleancache" which is used as a second-chance cache for clean
+ * page cache pages; and "frontswap" which is used for swap pages
+ * to avoid writes to disk.  A generic "shim" is provided here for each
+ * to translate in-kernel semantics to zcache semantics.
+ */
+
+#ifdef CONFIG_CLEANCACHE
+static void zcache_cleancache_put_page(int pool_id,
+					struct cleancache_filekey key,
+					pgoff_t index, struct page *page)
+{
+	u32 ind = (u32) index;
+	struct tmem_oid oid = *(struct tmem_oid *)&key;
+
+	if (likely(ind == index))
+		(void)zcache_put_page(pool_id, &oid, index, page);
+}
+
+static int zcache_cleancache_get_page(int pool_id,
+					struct cleancache_filekey key,
+					pgoff_t index, struct page *page)
+{
+	u32 ind = (u32) index;
+	struct tmem_oid oid = *(struct tmem_oid *)&key;
+	int ret = -1;
+
+	if (likely(ind == index))
+		ret = zcache_get_page(pool_id, &oid, index, page);
+	return ret;
+}
+
+static void zcache_cleancache_flush_page(int pool_id,
+					struct cleancache_filekey key,
+					pgoff_t index)
+{
+	u32 ind = (u32) index;
+	struct tmem_oid oid = *(struct tmem_oid *)&key;
+
+	if (likely(ind == index))
+		(void)zcache_flush_page(pool_id, &oid, ind);
+}
+
+static void zcache_cleancache_flush_inode(int pool_id,
+					struct cleancache_filekey key)
+{
+	struct tmem_oid oid = *(struct tmem_oid *)&key;
+
+	(void)zcache_flush_object(pool_id, &oid);
+}
+
+static void zcache_cleancache_flush_fs(int pool_id)
+{
+	if (pool_id >= 0)
+		(void)zcache_destroy_pool(pool_id);
+}
+
+static int zcache_cleancache_init_fs(size_t pagesize)
+{
+	BUG_ON(sizeof(struct cleancache_filekey) !=
+				sizeof(struct tmem_oid));
+	BUG_ON(pagesize != PAGE_SIZE);
+	return zcache_new_pool(0);
+}
+
+static int zcache_cleancache_init_shared_fs(char *uuid, size_t pagesize)
+{
+	/* shared pools are unsupported and map to private */
+	BUG_ON(sizeof(struct cleancache_filekey) !=
+				sizeof(struct tmem_oid));
+	BUG_ON(pagesize != PAGE_SIZE);
+	return zcache_new_pool(0);
+}
+
+static struct cleancache_ops zcache_cleancache_ops = {
+	.put_page = zcache_cleancache_put_page,
+	.get_page = zcache_cleancache_get_page,
+	.flush_page = zcache_cleancache_flush_page,
+	.flush_inode = zcache_cleancache_flush_inode,
+	.flush_fs = zcache_cleancache_flush_fs,
+	.init_shared_fs = zcache_cleancache_init_shared_fs,
+	.init_fs = zcache_cleancache_init_fs
+};
+
+struct cleancache_ops zcache_cleancache_register_ops(void)
+{
+	struct cleancache_ops old_ops =
+		cleancache_register_ops(&zcache_cleancache_ops);
+
+	return old_ops;
+}
+#endif
+
+#ifdef CONFIG_FRONTSWAP
+/* a single tmem poolid is used for all frontswap "types" (swapfiles) */
+static int zcache_frontswap_poolid = -1;
+
+/*
+ * Swizzling increases objects per swaptype, increasing tmem concurrency
+ * for heavy swaploads.  Later, larger nr_cpus -> larger SWIZ_BITS
+ */
+#define SWIZ_BITS		4
+#define SWIZ_MASK		((1 << SWIZ_BITS) - 1)
+#define _oswiz(_type, _ind)	((_type << SWIZ_BITS) | (_ind & SWIZ_MASK))
+#define iswiz(_ind)		(_ind >> SWIZ_BITS)
+
+static inline struct tmem_oid oswiz(unsigned type, u32 ind)
+{
+	struct tmem_oid oid = { .oid = { 0 } };
+	oid.oid[0] = _oswiz(type, ind);
+	return oid;
+}
+
+static int zcache_frontswap_put_page(unsigned type, pgoff_t offset,
+				   struct page *page)
+{
+	u64 ind64 = (u64)offset;
+	u32 ind = (u32)offset;
+	struct tmem_oid oid = oswiz(type, ind);
+	int ret = -1;
+	unsigned long flags;
+
+	BUG_ON(!PageLocked(page));
+	if (likely(ind64 == ind)) {
+		local_irq_save(flags);
+		ret = zcache_put_page(zcache_frontswap_poolid, &oid,
+					iswiz(ind), page);
+		local_irq_restore(flags);
+	}
+	return ret;
+}
+
+/* returns 0 if the page was successfully gotten from frontswap, -1 if
+ * was not present (should never happen!) */
+static int zcache_frontswap_get_page(unsigned type, pgoff_t offset,
+				   struct page *page)
+{
+	u64 ind64 = (u64)offset;
+	u32 ind = (u32)offset;
+	struct tmem_oid oid = oswiz(type, ind);
+	int ret = -1;
+
+	BUG_ON(!PageLocked(page));
+	if (likely(ind64 == ind))
+		ret = zcache_get_page(zcache_frontswap_poolid, &oid,
+					iswiz(ind), page);
+	return ret;
+}
+
+/* flush a single page from frontswap */
+static void zcache_frontswap_flush_page(unsigned type, pgoff_t offset)
+{
+	u64 ind64 = (u64)offset;
+	u32 ind = (u32)offset;
+	struct tmem_oid oid = oswiz(type, ind);
+
+	if (likely(ind64 == ind))
+		(void)zcache_flush_page(zcache_frontswap_poolid, &oid,
+					iswiz(ind));
+}
+
+/* flush all pages from the passed swaptype */
+static void zcache_frontswap_flush_area(unsigned type)
+{
+	struct tmem_oid oid;
+	int ind;
+
+	for (ind = SWIZ_MASK; ind >= 0; ind--) {
+		oid = oswiz(type, ind);
+		(void)zcache_flush_object(zcache_frontswap_poolid, &oid);
+	}
+}
+
+static void zcache_frontswap_init(unsigned ignored)
+{
+	/* a single tmem poolid is used for all frontswap "types" (swapfiles) */
+	if (zcache_frontswap_poolid < 0)
+		zcache_frontswap_poolid = zcache_new_pool(TMEM_POOL_PERSIST);
+}
+
+static struct frontswap_ops zcache_frontswap_ops = {
+	.put_page = zcache_frontswap_put_page,
+	.get_page = zcache_frontswap_get_page,
+	.flush_page = zcache_frontswap_flush_page,
+	.flush_area = zcache_frontswap_flush_area,
+	.init = zcache_frontswap_init
+};
+
+struct frontswap_ops zcache_frontswap_register_ops(void)
+{
+	struct frontswap_ops old_ops =
+		frontswap_register_ops(&zcache_frontswap_ops);
+
+	return old_ops;
+}
+#endif
+
+/*
+ * zcache initialization
+ * NOTE FOR NOW zcache MUST BE PROVIDED AS A KERNEL BOOT PARAMETER OR
+ * NOTHING HAPPENS!
+ */
+
+static int zcache_enabled;
+
+static int __init enable_zcache(char *s)
+{
+	zcache_enabled = 1;
+	return 1;
+}
+__setup("zcache", enable_zcache);
+
+/* allow independent dynamic disabling of cleancache and frontswap */
+
+static int use_cleancache = 1;
+
+static int __init no_cleancache(char *s)
+{
+	use_cleancache = 0;
+	return 1;
+}
+
+__setup("nocleancache", no_cleancache);
+
+static int use_frontswap = 1;
+
+static int __init no_frontswap(char *s)
+{
+	use_frontswap = 0;
+	return 1;
+}
+
+__setup("nofrontswap", no_frontswap);
+
+static int __init zcache_init(void)
+{
+#ifdef CONFIG_SYSFS
+	int ret = 0;
+
+	ret = sysfs_create_group(mm_kobj, &zcache_attr_group);
+	if (ret) {
+		pr_err("zcache: can't create sysfs\n");
+		goto out;
+	}
+#endif /* CONFIG_SYSFS */
+#if defined(CONFIG_CLEANCACHE) || defined(CONFIG_FRONTSWAP)
+	if (zcache_enabled) {
+		unsigned int cpu;
+
+		tmem_register_hostops(&zcache_hostops);
+		tmem_register_pamops(&zcache_pamops);
+		ret = register_cpu_notifier(&zcache_cpu_notifier_block);
+		if (ret) {
+			pr_err("zcache: can't register cpu notifier\n");
+			goto out;
+		}
+		for_each_online_cpu(cpu) {
+			void *pcpu = (void *)(long)cpu;
+			zcache_cpu_notifier(&zcache_cpu_notifier_block,
+				CPU_UP_PREPARE, pcpu);
+		}
+	}
+	zcache_objnode_cache = kmem_cache_create("zcache_objnode",
+				sizeof(struct tmem_objnode), 0, 0, NULL);
+	zcache_obj_cache = kmem_cache_create("zcache_obj",
+				sizeof(struct tmem_obj), 0, 0, NULL);
+#endif
+#ifdef CONFIG_CLEANCACHE
+	if (zcache_enabled && use_cleancache) {
+		struct cleancache_ops old_ops;
+
+		zbud_init();
+		register_shrinker(&zcache_shrinker);
+		old_ops = zcache_cleancache_register_ops();
+		pr_info("zcache: cleancache enabled using kernel "
+			"transcendent memory and compression buddies\n");
+		if (old_ops.init_fs != NULL)
+			pr_warning("zcache: cleancache_ops overridden");
+	}
+#endif
+#ifdef CONFIG_FRONTSWAP
+	if (zcache_enabled && use_frontswap) {
+		struct frontswap_ops old_ops;
+
+		zcache_client.xvpool = xv_create_pool();
+		if (zcache_client.xvpool == NULL) {
+			pr_err("zcache: can't create xvpool\n");
+			goto out;
+		}
+		old_ops = zcache_frontswap_register_ops();
+		pr_info("zcache: frontswap enabled using kernel "
+			"transcendent memory and xvmalloc\n");
+		if (old_ops.init != NULL)
+			pr_warning("ktmem: frontswap_ops overridden");
+	}
+#endif
+out:
+	return ret;
+}
+
+module_init(zcache_init)
diff --git a/drivers/staging/zcache/zcache.c b/drivers/staging/zcache/zcache.c
deleted file mode 100644
index 77ac2d4..0000000
--- a/drivers/staging/zcache/zcache.c
+++ /dev/null
@@ -1,1661 +0,0 @@
-/*
- * zcache.c
- *
- * Copyright (c) 2010,2011, Dan Magenheimer, Oracle Corp.
- * Copyright (c) 2010,2011, Nitin Gupta
- *
- * Zcache provides an in-kernel "host implementation" for transcendent memory
- * and, thus indirectly, for cleancache and frontswap.  Zcache includes two
- * page-accessible memory [1] interfaces, both utilizing lzo1x compression:
- * 1) "compression buddies" ("zbud") is used for ephemeral pages
- * 2) xvmalloc is used for persistent pages.
- * Xvmalloc (based on the TLSF allocator) has very low fragmentation
- * so maximizes space efficiency, while zbud allows pairs (and potentially,
- * in the future, more than a pair of) compressed pages to be closely linked
- * so that reclaiming can be done via the kernel's physical-page-oriented
- * "shrinker" interface.
- *
- * [1] For a definition of page-accessible memory (aka PAM), see:
- *   http://marc.info/?l=linux-mm&m=127811271605009
- */
-
-#include <linux/cpu.h>
-#include <linux/highmem.h>
-#include <linux/list.h>
-#include <linux/lzo.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/types.h>
-#include <linux/atomic.h>
-#include "tmem.h"
-
-#include "../zram/xvmalloc.h" /* if built in drivers/staging */
-
-#if (!defined(CONFIG_CLEANCACHE) && !defined(CONFIG_FRONTSWAP))
-#error "zcache is useless without CONFIG_CLEANCACHE or CONFIG_FRONTSWAP"
-#endif
-#ifdef CONFIG_CLEANCACHE
-#include <linux/cleancache.h>
-#endif
-#ifdef CONFIG_FRONTSWAP
-#include <linux/frontswap.h>
-#endif
-
-#if 0
-/* this is more aggressive but may cause other problems? */
-#define ZCACHE_GFP_MASK	(GFP_ATOMIC | __GFP_NORETRY | __GFP_NOWARN)
-#else
-#define ZCACHE_GFP_MASK \
-	(__GFP_FS | __GFP_NORETRY | __GFP_NOWARN | __GFP_NOMEMALLOC)
-#endif
-
-/**********
- * Compression buddies ("zbud") provides for packing two (or, possibly
- * in the future, more) compressed ephemeral pages into a single "raw"
- * (physical) page and tracking them with data structures so that
- * the raw pages can be easily reclaimed.
- *
- * A zbud page ("zbpg") is an aligned page containing a list_head,
- * a lock, and two "zbud headers".  The remainder of the physical
- * page is divided up into aligned 64-byte "chunks" which contain
- * the compressed data for zero, one, or two zbuds.  Each zbpg
- * resides on: (1) an "unused list" if it has no zbuds; (2) a
- * "buddied" list if it is fully populated  with two zbuds; or
- * (3) one of PAGE_SIZE/64 "unbuddied" lists indexed by how many chunks
- * the one unbuddied zbud uses.  The data inside a zbpg cannot be
- * read or written unless the zbpg's lock is held.
- */
-
-#define ZBH_SENTINEL  0x43214321
-#define ZBPG_SENTINEL  0xdeadbeef
-
-#define ZBUD_MAX_BUDS 2
-
-struct zbud_hdr {
-	uint32_t pool_id;
-	struct tmem_oid oid;
-	uint32_t index;
-	uint16_t size; /* compressed size in bytes, zero means unused */
-	DECL_SENTINEL
-};
-
-struct zbud_page {
-	struct list_head bud_list;
-	spinlock_t lock;
-	struct zbud_hdr buddy[ZBUD_MAX_BUDS];
-	DECL_SENTINEL
-	/* followed by NUM_CHUNK aligned CHUNK_SIZE-byte chunks */
-};
-
-#define CHUNK_SHIFT	6
-#define CHUNK_SIZE	(1 << CHUNK_SHIFT)
-#define CHUNK_MASK	(~(CHUNK_SIZE-1))
-#define NCHUNKS		(((PAGE_SIZE - sizeof(struct zbud_page)) & \
-				CHUNK_MASK) >> CHUNK_SHIFT)
-#define MAX_CHUNK	(NCHUNKS-1)
-
-static struct {
-	struct list_head list;
-	unsigned count;
-} zbud_unbuddied[NCHUNKS];
-/* list N contains pages with N chunks USED and NCHUNKS-N unused */
-/* element 0 is never used but optimizing that isn't worth it */
-static unsigned long zbud_cumul_chunk_counts[NCHUNKS];
-
-struct list_head zbud_buddied_list;
-static unsigned long zcache_zbud_buddied_count;
-
-/* protects the buddied list and all unbuddied lists */
-static DEFINE_SPINLOCK(zbud_budlists_spinlock);
-
-static LIST_HEAD(zbpg_unused_list);
-static unsigned long zcache_zbpg_unused_list_count;
-
-/* protects the unused page list */
-static DEFINE_SPINLOCK(zbpg_unused_list_spinlock);
-
-static atomic_t zcache_zbud_curr_raw_pages;
-static atomic_t zcache_zbud_curr_zpages;
-static unsigned long zcache_zbud_curr_zbytes;
-static unsigned long zcache_zbud_cumul_zpages;
-static unsigned long zcache_zbud_cumul_zbytes;
-static unsigned long zcache_compress_poor;
-
-/* forward references */
-static void *zcache_get_free_page(void);
-static void zcache_free_page(void *p);
-
-/*
- * zbud helper functions
- */
-
-static inline unsigned zbud_max_buddy_size(void)
-{
-	return MAX_CHUNK << CHUNK_SHIFT;
-}
-
-static inline unsigned zbud_size_to_chunks(unsigned size)
-{
-	BUG_ON(size == 0 || size > zbud_max_buddy_size());
-	return (size + CHUNK_SIZE - 1) >> CHUNK_SHIFT;
-}
-
-static inline int zbud_budnum(struct zbud_hdr *zh)
-{
-	unsigned offset = (unsigned long)zh & (PAGE_SIZE - 1);
-	struct zbud_page *zbpg = NULL;
-	unsigned budnum = -1U;
-	int i;
-
-	for (i = 0; i < ZBUD_MAX_BUDS; i++)
-		if (offset == offsetof(typeof(*zbpg), buddy[i])) {
-			budnum = i;
-			break;
-		}
-	BUG_ON(budnum == -1U);
-	return budnum;
-}
-
-static char *zbud_data(struct zbud_hdr *zh, unsigned size)
-{
-	struct zbud_page *zbpg;
-	char *p;
-	unsigned budnum;
-
-	ASSERT_SENTINEL(zh, ZBH);
-	budnum = zbud_budnum(zh);
-	BUG_ON(size == 0 || size > zbud_max_buddy_size());
-	zbpg = container_of(zh, struct zbud_page, buddy[budnum]);
-	ASSERT_SPINLOCK(&zbpg->lock);
-	p = (char *)zbpg;
-	if (budnum == 0)
-		p += ((sizeof(struct zbud_page) + CHUNK_SIZE - 1) &
-							CHUNK_MASK);
-	else if (budnum == 1)
-		p += PAGE_SIZE - ((size + CHUNK_SIZE - 1) & CHUNK_MASK);
-	return p;
-}
-
-/*
- * zbud raw page management
- */
-
-static struct zbud_page *zbud_alloc_raw_page(void)
-{
-	struct zbud_page *zbpg = NULL;
-	struct zbud_hdr *zh0, *zh1;
-	bool recycled = 0;
-
-	/* if any pages on the zbpg list, use one */
-	spin_lock(&zbpg_unused_list_spinlock);
-	if (!list_empty(&zbpg_unused_list)) {
-		zbpg = list_first_entry(&zbpg_unused_list,
-				struct zbud_page, bud_list);
-		list_del_init(&zbpg->bud_list);
-		zcache_zbpg_unused_list_count--;
-		recycled = 1;
-	}
-	spin_unlock(&zbpg_unused_list_spinlock);
-	if (zbpg == NULL)
-		/* none on zbpg list, try to get a kernel page */
-		zbpg = zcache_get_free_page();
-	if (likely(zbpg != NULL)) {
-		INIT_LIST_HEAD(&zbpg->bud_list);
-		zh0 = &zbpg->buddy[0]; zh1 = &zbpg->buddy[1];
-		spin_lock_init(&zbpg->lock);
-		if (recycled) {
-			ASSERT_INVERTED_SENTINEL(zbpg, ZBPG);
-			SET_SENTINEL(zbpg, ZBPG);
-			BUG_ON(zh0->size != 0 || tmem_oid_valid(&zh0->oid));
-			BUG_ON(zh1->size != 0 || tmem_oid_valid(&zh1->oid));
-		} else {
-			atomic_inc(&zcache_zbud_curr_raw_pages);
-			INIT_LIST_HEAD(&zbpg->bud_list);
-			SET_SENTINEL(zbpg, ZBPG);
-			zh0->size = 0; zh1->size = 0;
-			tmem_oid_set_invalid(&zh0->oid);
-			tmem_oid_set_invalid(&zh1->oid);
-		}
-	}
-	return zbpg;
-}
-
-static void zbud_free_raw_page(struct zbud_page *zbpg)
-{
-	struct zbud_hdr *zh0 = &zbpg->buddy[0], *zh1 = &zbpg->buddy[1];
-
-	ASSERT_SENTINEL(zbpg, ZBPG);
-	BUG_ON(!list_empty(&zbpg->bud_list));
-	ASSERT_SPINLOCK(&zbpg->lock);
-	BUG_ON(zh0->size != 0 || tmem_oid_valid(&zh0->oid));
-	BUG_ON(zh1->size != 0 || tmem_oid_valid(&zh1->oid));
-	INVERT_SENTINEL(zbpg, ZBPG);
-	spin_unlock(&zbpg->lock);
-	spin_lock(&zbpg_unused_list_spinlock);
-	list_add(&zbpg->bud_list, &zbpg_unused_list);
-	zcache_zbpg_unused_list_count++;
-	spin_unlock(&zbpg_unused_list_spinlock);
-}
-
-/*
- * core zbud handling routines
- */
-
-static unsigned zbud_free(struct zbud_hdr *zh)
-{
-	unsigned size;
-
-	ASSERT_SENTINEL(zh, ZBH);
-	BUG_ON(!tmem_oid_valid(&zh->oid));
-	size = zh->size;
-	BUG_ON(zh->size == 0 || zh->size > zbud_max_buddy_size());
-	zh->size = 0;
-	tmem_oid_set_invalid(&zh->oid);
-	INVERT_SENTINEL(zh, ZBH);
-	zcache_zbud_curr_zbytes -= size;
-	atomic_dec(&zcache_zbud_curr_zpages);
-	return size;
-}
-
-static void zbud_free_and_delist(struct zbud_hdr *zh)
-{
-	unsigned chunks;
-	struct zbud_hdr *zh_other;
-	unsigned budnum = zbud_budnum(zh), size;
-	struct zbud_page *zbpg =
-		container_of(zh, struct zbud_page, buddy[budnum]);
-
-	spin_lock(&zbpg->lock);
-	if (list_empty(&zbpg->bud_list)) {
-		/* ignore zombie page... see zbud_evict_pages() */
-		spin_unlock(&zbpg->lock);
-		return;
-	}
-	size = zbud_free(zh);
-	ASSERT_SPINLOCK(&zbpg->lock);
-	zh_other = &zbpg->buddy[(budnum == 0) ? 1 : 0];
-	if (zh_other->size == 0) { /* was unbuddied: unlist and free */
-		chunks = zbud_size_to_chunks(size) ;
-		spin_lock(&zbud_budlists_spinlock);
-		BUG_ON(list_empty(&zbud_unbuddied[chunks].list));
-		list_del_init(&zbpg->bud_list);
-		zbud_unbuddied[chunks].count--;
-		spin_unlock(&zbud_budlists_spinlock);
-		zbud_free_raw_page(zbpg);
-	} else { /* was buddied: move remaining buddy to unbuddied list */
-		chunks = zbud_size_to_chunks(zh_other->size) ;
-		spin_lock(&zbud_budlists_spinlock);
-		list_del_init(&zbpg->bud_list);
-		zcache_zbud_buddied_count--;
-		list_add_tail(&zbpg->bud_list, &zbud_unbuddied[chunks].list);
-		zbud_unbuddied[chunks].count++;
-		spin_unlock(&zbud_budlists_spinlock);
-		spin_unlock(&zbpg->lock);
-	}
-}
-
-static struct zbud_hdr *zbud_create(uint32_t pool_id, struct tmem_oid *oid,
-					uint32_t index, struct page *page,
-					void *cdata, unsigned size)
-{
-	struct zbud_hdr *zh0, *zh1, *zh = NULL;
-	struct zbud_page *zbpg = NULL, *ztmp;
-	unsigned nchunks;
-	char *to;
-	int i, found_good_buddy = 0;
-
-	nchunks = zbud_size_to_chunks(size) ;
-	for (i = MAX_CHUNK - nchunks + 1; i > 0; i--) {
-		spin_lock(&zbud_budlists_spinlock);
-		if (!list_empty(&zbud_unbuddied[i].list)) {
-			list_for_each_entry_safe(zbpg, ztmp,
-				    &zbud_unbuddied[i].list, bud_list) {
-				if (spin_trylock(&zbpg->lock)) {
-					found_good_buddy = i;
-					goto found_unbuddied;
-				}
-			}
-		}
-		spin_unlock(&zbud_budlists_spinlock);
-	}
-	/* didn't find a good buddy, try allocating a new page */
-	zbpg = zbud_alloc_raw_page();
-	if (unlikely(zbpg == NULL))
-		goto out;
-	/* ok, have a page, now compress the data before taking locks */
-	spin_lock(&zbpg->lock);
-	spin_lock(&zbud_budlists_spinlock);
-	list_add_tail(&zbpg->bud_list, &zbud_unbuddied[nchunks].list);
-	zbud_unbuddied[nchunks].count++;
-	zh = &zbpg->buddy[0];
-	goto init_zh;
-
-found_unbuddied:
-	ASSERT_SPINLOCK(&zbpg->lock);
-	zh0 = &zbpg->buddy[0]; zh1 = &zbpg->buddy[1];
-	BUG_ON(!((zh0->size == 0) ^ (zh1->size == 0)));
-	if (zh0->size != 0) { /* buddy0 in use, buddy1 is vacant */
-		ASSERT_SENTINEL(zh0, ZBH);
-		zh = zh1;
-	} else if (zh1->size != 0) { /* buddy1 in use, buddy0 is vacant */
-		ASSERT_SENTINEL(zh1, ZBH);
-		zh = zh0;
-	} else
-		BUG();
-	list_del_init(&zbpg->bud_list);
-	zbud_unbuddied[found_good_buddy].count--;
-	list_add_tail(&zbpg->bud_list, &zbud_buddied_list);
-	zcache_zbud_buddied_count++;
-
-init_zh:
-	SET_SENTINEL(zh, ZBH);
-	zh->size = size;
-	zh->index = index;
-	zh->oid = *oid;
-	zh->pool_id = pool_id;
-	/* can wait to copy the data until the list locks are dropped */
-	spin_unlock(&zbud_budlists_spinlock);
-
-	to = zbud_data(zh, size);
-	memcpy(to, cdata, size);
-	spin_unlock(&zbpg->lock);
-	zbud_cumul_chunk_counts[nchunks]++;
-	atomic_inc(&zcache_zbud_curr_zpages);
-	zcache_zbud_cumul_zpages++;
-	zcache_zbud_curr_zbytes += size;
-	zcache_zbud_cumul_zbytes += size;
-out:
-	return zh;
-}
-
-static int zbud_decompress(struct page *page, struct zbud_hdr *zh)
-{
-	struct zbud_page *zbpg;
-	unsigned budnum = zbud_budnum(zh);
-	size_t out_len = PAGE_SIZE;
-	char *to_va, *from_va;
-	unsigned size;
-	int ret = 0;
-
-	zbpg = container_of(zh, struct zbud_page, buddy[budnum]);
-	spin_lock(&zbpg->lock);
-	if (list_empty(&zbpg->bud_list)) {
-		/* ignore zombie page... see zbud_evict_pages() */
-		ret = -EINVAL;
-		goto out;
-	}
-	ASSERT_SENTINEL(zh, ZBH);
-	BUG_ON(zh->size == 0 || zh->size > zbud_max_buddy_size());
-	to_va = kmap_atomic(page, KM_USER0);
-	size = zh->size;
-	from_va = zbud_data(zh, size);
-	ret = lzo1x_decompress_safe(from_va, size, to_va, &out_len);
-	BUG_ON(ret != LZO_E_OK);
-	BUG_ON(out_len != PAGE_SIZE);
-	kunmap_atomic(to_va, KM_USER0);
-out:
-	spin_unlock(&zbpg->lock);
-	return ret;
-}
-
-/*
- * The following routines handle shrinking of ephemeral pages by evicting
- * pages "least valuable" first.
- */
-
-static unsigned long zcache_evicted_raw_pages;
-static unsigned long zcache_evicted_buddied_pages;
-static unsigned long zcache_evicted_unbuddied_pages;
-
-static struct tmem_pool *zcache_get_pool_by_id(uint32_t poolid);
-static void zcache_put_pool(struct tmem_pool *pool);
-
-/*
- * Flush and free all zbuds in a zbpg, then free the pageframe
- */
-static void zbud_evict_zbpg(struct zbud_page *zbpg)
-{
-	struct zbud_hdr *zh;
-	int i, j;
-	uint32_t pool_id[ZBUD_MAX_BUDS], index[ZBUD_MAX_BUDS];
-	struct tmem_oid oid[ZBUD_MAX_BUDS];
-	struct tmem_pool *pool;
-
-	ASSERT_SPINLOCK(&zbpg->lock);
-	BUG_ON(!list_empty(&zbpg->bud_list));
-	for (i = 0, j = 0; i < ZBUD_MAX_BUDS; i++) {
-		zh = &zbpg->buddy[i];
-		if (zh->size) {
-			pool_id[j] = zh->pool_id;
-			oid[j] = zh->oid;
-			index[j] = zh->index;
-			j++;
-			zbud_free(zh);
-		}
-	}
-	spin_unlock(&zbpg->lock);
-	for (i = 0; i < j; i++) {
-		pool = zcache_get_pool_by_id(pool_id[i]);
-		if (pool != NULL) {
-			tmem_flush_page(pool, &oid[i], index[i]);
-			zcache_put_pool(pool);
-		}
-	}
-	ASSERT_SENTINEL(zbpg, ZBPG);
-	spin_lock(&zbpg->lock);
-	zbud_free_raw_page(zbpg);
-}
-
-/*
- * Free nr pages.  This code is funky because we want to hold the locks
- * protecting various lists for as short a time as possible, and in some
- * circumstances the list may change asynchronously when the list lock is
- * not held.  In some cases we also trylock not only to avoid waiting on a
- * page in use by another cpu, but also to avoid potential deadlock due to
- * lock inversion.
- */
-static void zbud_evict_pages(int nr)
-{
-	struct zbud_page *zbpg;
-	int i;
-
-	/* first try freeing any pages on unused list */
-retry_unused_list:
-	spin_lock_bh(&zbpg_unused_list_spinlock);
-	if (!list_empty(&zbpg_unused_list)) {
-		/* can't walk list here, since it may change when unlocked */
-		zbpg = list_first_entry(&zbpg_unused_list,
-				struct zbud_page, bud_list);
-		list_del_init(&zbpg->bud_list);
-		zcache_zbpg_unused_list_count--;
-		atomic_dec(&zcache_zbud_curr_raw_pages);
-		spin_unlock_bh(&zbpg_unused_list_spinlock);
-		zcache_free_page(zbpg);
-		zcache_evicted_raw_pages++;
-		if (--nr <= 0)
-			goto out;
-		goto retry_unused_list;
-	}
-	spin_unlock_bh(&zbpg_unused_list_spinlock);
-
-	/* now try freeing unbuddied pages, starting with least space avail */
-	for (i = 0; i < MAX_CHUNK; i++) {
-retry_unbud_list_i:
-		spin_lock_bh(&zbud_budlists_spinlock);
-		if (list_empty(&zbud_unbuddied[i].list)) {
-			spin_unlock_bh(&zbud_budlists_spinlock);
-			continue;
-		}
-		list_for_each_entry(zbpg, &zbud_unbuddied[i].list, bud_list) {
-			if (unlikely(!spin_trylock(&zbpg->lock)))
-				continue;
-			list_del_init(&zbpg->bud_list);
-			zbud_unbuddied[i].count--;
-			spin_unlock(&zbud_budlists_spinlock);
-			zcache_evicted_unbuddied_pages++;
-			/* want budlists unlocked when doing zbpg eviction */
-			zbud_evict_zbpg(zbpg);
-			local_bh_enable();
-			if (--nr <= 0)
-				goto out;
-			goto retry_unbud_list_i;
-		}
-		spin_unlock_bh(&zbud_budlists_spinlock);
-	}
-
-	/* as a last resort, free buddied pages */
-retry_bud_list:
-	spin_lock_bh(&zbud_budlists_spinlock);
-	if (list_empty(&zbud_buddied_list)) {
-		spin_unlock_bh(&zbud_budlists_spinlock);
-		goto out;
-	}
-	list_for_each_entry(zbpg, &zbud_buddied_list, bud_list) {
-		if (unlikely(!spin_trylock(&zbpg->lock)))
-			continue;
-		list_del_init(&zbpg->bud_list);
-		zcache_zbud_buddied_count--;
-		spin_unlock(&zbud_budlists_spinlock);
-		zcache_evicted_buddied_pages++;
-		/* want budlists unlocked when doing zbpg eviction */
-		zbud_evict_zbpg(zbpg);
-		local_bh_enable();
-		if (--nr <= 0)
-			goto out;
-		goto retry_bud_list;
-	}
-	spin_unlock_bh(&zbud_budlists_spinlock);
-out:
-	return;
-}
-
-static void zbud_init(void)
-{
-	int i;
-
-	INIT_LIST_HEAD(&zbud_buddied_list);
-	zcache_zbud_buddied_count = 0;
-	for (i = 0; i < NCHUNKS; i++) {
-		INIT_LIST_HEAD(&zbud_unbuddied[i].list);
-		zbud_unbuddied[i].count = 0;
-	}
-}
-
-#ifdef CONFIG_SYSFS
-/*
- * These sysfs routines show a nice distribution of how many zbpg's are
- * currently (and have ever been placed) in each unbuddied list.  It's fun
- * to watch but can probably go away before final merge.
- */
-static int zbud_show_unbuddied_list_counts(char *buf)
-{
-	int i;
-	char *p = buf;
-
-	for (i = 0; i < NCHUNKS - 1; i++)
-		p += sprintf(p, "%u ", zbud_unbuddied[i].count);
-	p += sprintf(p, "%d\n", zbud_unbuddied[i].count);
-	return p - buf;
-}
-
-static int zbud_show_cumul_chunk_counts(char *buf)
-{
-	unsigned long i, chunks = 0, total_chunks = 0, sum_total_chunks = 0;
-	unsigned long total_chunks_lte_21 = 0, total_chunks_lte_32 = 0;
-	unsigned long total_chunks_lte_42 = 0;
-	char *p = buf;
-
-	for (i = 0; i < NCHUNKS; i++) {
-		p += sprintf(p, "%lu ", zbud_cumul_chunk_counts[i]);
-		chunks += zbud_cumul_chunk_counts[i];
-		total_chunks += zbud_cumul_chunk_counts[i];
-		sum_total_chunks += i * zbud_cumul_chunk_counts[i];
-		if (i == 21)
-			total_chunks_lte_21 = total_chunks;
-		if (i == 32)
-			total_chunks_lte_32 = total_chunks;
-		if (i == 42)
-			total_chunks_lte_42 = total_chunks;
-	}
-	p += sprintf(p, "<=21:%lu <=32:%lu <=42:%lu, mean:%lu\n",
-		total_chunks_lte_21, total_chunks_lte_32, total_chunks_lte_42,
-		chunks == 0 ? 0 : sum_total_chunks / chunks);
-	return p - buf;
-}
-#endif
-
-/**********
- * This "zv" PAM implementation combines the TLSF-based xvMalloc
- * with lzo1x compression to maximize the amount of data that can
- * be packed into a physical page.
- *
- * Zv represents a PAM page with the index and object (plus a "size" value
- * necessary for decompression) immediately preceding the compressed data.
- */
-
-#define ZVH_SENTINEL  0x43214321
-
-struct zv_hdr {
-	uint32_t pool_id;
-	struct tmem_oid oid;
-	uint32_t index;
-	DECL_SENTINEL
-};
-
-static const int zv_max_page_size = (PAGE_SIZE / 8) * 7;
-
-static struct zv_hdr *zv_create(struct xv_pool *xvpool, uint32_t pool_id,
-				struct tmem_oid *oid, uint32_t index,
-				void *cdata, unsigned clen)
-{
-	struct page *page;
-	struct zv_hdr *zv = NULL;
-	uint32_t offset;
-	int ret;
-
-	BUG_ON(!irqs_disabled());
-	ret = xv_malloc(xvpool, clen + sizeof(struct zv_hdr),
-			&page, &offset, ZCACHE_GFP_MASK);
-	if (unlikely(ret))
-		goto out;
-	zv = kmap_atomic(page, KM_USER0) + offset;
-	zv->index = index;
-	zv->oid = *oid;
-	zv->pool_id = pool_id;
-	SET_SENTINEL(zv, ZVH);
-	memcpy((char *)zv + sizeof(struct zv_hdr), cdata, clen);
-	kunmap_atomic(zv, KM_USER0);
-out:
-	return zv;
-}
-
-static void zv_free(struct xv_pool *xvpool, struct zv_hdr *zv)
-{
-	unsigned long flags;
-	struct page *page;
-	uint32_t offset;
-	uint16_t size;
-
-	ASSERT_SENTINEL(zv, ZVH);
-	size = xv_get_object_size(zv) - sizeof(*zv);
-	BUG_ON(size == 0 || size > zv_max_page_size);
-	INVERT_SENTINEL(zv, ZVH);
-	page = virt_to_page(zv);
-	offset = (unsigned long)zv & ~PAGE_MASK;
-	local_irq_save(flags);
-	xv_free(xvpool, page, offset);
-	local_irq_restore(flags);
-}
-
-static void zv_decompress(struct page *page, struct zv_hdr *zv)
-{
-	size_t clen = PAGE_SIZE;
-	char *to_va;
-	unsigned size;
-	int ret;
-
-	ASSERT_SENTINEL(zv, ZVH);
-	size = xv_get_object_size(zv) - sizeof(*zv);
-	BUG_ON(size == 0 || size > zv_max_page_size);
-	to_va = kmap_atomic(page, KM_USER0);
-	ret = lzo1x_decompress_safe((char *)zv + sizeof(*zv),
-					size, to_va, &clen);
-	kunmap_atomic(to_va, KM_USER0);
-	BUG_ON(ret != LZO_E_OK);
-	BUG_ON(clen != PAGE_SIZE);
-}
-
-/*
- * zcache core code starts here
- */
-
-/* useful stats not collected by cleancache or frontswap */
-static unsigned long zcache_flush_total;
-static unsigned long zcache_flush_found;
-static unsigned long zcache_flobj_total;
-static unsigned long zcache_flobj_found;
-static unsigned long zcache_failed_eph_puts;
-static unsigned long zcache_failed_pers_puts;
-
-#define MAX_POOLS_PER_CLIENT 16
-
-static struct {
-	struct tmem_pool *tmem_pools[MAX_POOLS_PER_CLIENT];
-	struct xv_pool *xvpool;
-} zcache_client;
-
-/*
- * Tmem operations assume the poolid implies the invoking client.
- * Zcache only has one client (the kernel itself), so translate
- * the poolid into the tmem_pool allocated for it.  A KVM version
- * of zcache would have one client per guest and each client might
- * have a poolid==N.
- */
-static struct tmem_pool *zcache_get_pool_by_id(uint32_t poolid)
-{
-	struct tmem_pool *pool = NULL;
-
-	if (poolid >= 0) {
-		pool = zcache_client.tmem_pools[poolid];
-		if (pool != NULL)
-			atomic_inc(&pool->refcount);
-	}
-	return pool;
-}
-
-static void zcache_put_pool(struct tmem_pool *pool)
-{
-	if (pool != NULL)
-		atomic_dec(&pool->refcount);
-}
-
-/* counters for debugging */
-static unsigned long zcache_failed_get_free_pages;
-static unsigned long zcache_failed_alloc;
-static unsigned long zcache_put_to_flush;
-static unsigned long zcache_aborted_preload;
-static unsigned long zcache_aborted_shrink;
-
-/*
- * Ensure that memory allocation requests in zcache don't result
- * in direct reclaim requests via the shrinker, which would cause
- * an infinite loop.  Maybe a GFP flag would be better?
- */
-static DEFINE_SPINLOCK(zcache_direct_reclaim_lock);
-
-/*
- * for now, used named slabs so can easily track usage; later can
- * either just use kmalloc, or perhaps add a slab-like allocator
- * to more carefully manage total memory utilization
- */
-static struct kmem_cache *zcache_objnode_cache;
-static struct kmem_cache *zcache_obj_cache;
-static atomic_t zcache_curr_obj_count = ATOMIC_INIT(0);
-static unsigned long zcache_curr_obj_count_max;
-static atomic_t zcache_curr_objnode_count = ATOMIC_INIT(0);
-static unsigned long zcache_curr_objnode_count_max;
-
-/*
- * to avoid memory allocation recursion (e.g. due to direct reclaim), we
- * preload all necessary data structures so the hostops callbacks never
- * actually do a malloc
- */
-struct zcache_preload {
-	void *page;
-	struct tmem_obj *obj;
-	int nr;
-	struct tmem_objnode *objnodes[OBJNODE_TREE_MAX_PATH];
-};
-static DEFINE_PER_CPU(struct zcache_preload, zcache_preloads) = { 0, };
-
-static int zcache_do_preload(struct tmem_pool *pool)
-{
-	struct zcache_preload *kp;
-	struct tmem_objnode *objnode;
-	struct tmem_obj *obj;
-	void *page;
-	int ret = -ENOMEM;
-
-	if (unlikely(zcache_objnode_cache == NULL))
-		goto out;
-	if (unlikely(zcache_obj_cache == NULL))
-		goto out;
-	if (!spin_trylock(&zcache_direct_reclaim_lock)) {
-		zcache_aborted_preload++;
-		goto out;
-	}
-	preempt_disable();
-	kp = &__get_cpu_var(zcache_preloads);
-	while (kp->nr < ARRAY_SIZE(kp->objnodes)) {
-		preempt_enable_no_resched();
-		objnode = kmem_cache_alloc(zcache_objnode_cache,
-				ZCACHE_GFP_MASK);
-		if (unlikely(objnode == NULL)) {
-			zcache_failed_alloc++;
-			goto unlock_out;
-		}
-		preempt_disable();
-		kp = &__get_cpu_var(zcache_preloads);
-		if (kp->nr < ARRAY_SIZE(kp->objnodes))
-			kp->objnodes[kp->nr++] = objnode;
-		else
-			kmem_cache_free(zcache_objnode_cache, objnode);
-	}
-	preempt_enable_no_resched();
-	obj = kmem_cache_alloc(zcache_obj_cache, ZCACHE_GFP_MASK);
-	if (unlikely(obj == NULL)) {
-		zcache_failed_alloc++;
-		goto unlock_out;
-	}
-	page = (void *)__get_free_page(ZCACHE_GFP_MASK);
-	if (unlikely(page == NULL)) {
-		zcache_failed_get_free_pages++;
-		kmem_cache_free(zcache_obj_cache, obj);
-		goto unlock_out;
-	}
-	preempt_disable();
-	kp = &__get_cpu_var(zcache_preloads);
-	if (kp->obj == NULL)
-		kp->obj = obj;
-	else
-		kmem_cache_free(zcache_obj_cache, obj);
-	if (kp->page == NULL)
-		kp->page = page;
-	else
-		free_page((unsigned long)page);
-	ret = 0;
-unlock_out:
-	spin_unlock(&zcache_direct_reclaim_lock);
-out:
-	return ret;
-}
-
-static void *zcache_get_free_page(void)
-{
-	struct zcache_preload *kp;
-	void *page;
-
-	kp = &__get_cpu_var(zcache_preloads);
-	page = kp->page;
-	BUG_ON(page == NULL);
-	kp->page = NULL;
-	return page;
-}
-
-static void zcache_free_page(void *p)
-{
-	free_page((unsigned long)p);
-}
-
-/*
- * zcache implementation for tmem host ops
- */
-
-static struct tmem_objnode *zcache_objnode_alloc(struct tmem_pool *pool)
-{
-	struct tmem_objnode *objnode = NULL;
-	unsigned long count;
-	struct zcache_preload *kp;
-
-	kp = &__get_cpu_var(zcache_preloads);
-	if (kp->nr <= 0)
-		goto out;
-	objnode = kp->objnodes[kp->nr - 1];
-	BUG_ON(objnode == NULL);
-	kp->objnodes[kp->nr - 1] = NULL;
-	kp->nr--;
-	count = atomic_inc_return(&zcache_curr_objnode_count);
-	if (count > zcache_curr_objnode_count_max)
-		zcache_curr_objnode_count_max = count;
-out:
-	return objnode;
-}
-
-static void zcache_objnode_free(struct tmem_objnode *objnode,
-					struct tmem_pool *pool)
-{
-	atomic_dec(&zcache_curr_objnode_count);
-	BUG_ON(atomic_read(&zcache_curr_objnode_count) < 0);
-	kmem_cache_free(zcache_objnode_cache, objnode);
-}
-
-static struct tmem_obj *zcache_obj_alloc(struct tmem_pool *pool)
-{
-	struct tmem_obj *obj = NULL;
-	unsigned long count;
-	struct zcache_preload *kp;
-
-	kp = &__get_cpu_var(zcache_preloads);
-	obj = kp->obj;
-	BUG_ON(obj == NULL);
-	kp->obj = NULL;
-	count = atomic_inc_return(&zcache_curr_obj_count);
-	if (count > zcache_curr_obj_count_max)
-		zcache_curr_obj_count_max = count;
-	return obj;
-}
-
-static void zcache_obj_free(struct tmem_obj *obj, struct tmem_pool *pool)
-{
-	atomic_dec(&zcache_curr_obj_count);
-	BUG_ON(atomic_read(&zcache_curr_obj_count) < 0);
-	kmem_cache_free(zcache_obj_cache, obj);
-}
-
-static struct tmem_hostops zcache_hostops = {
-	.obj_alloc = zcache_obj_alloc,
-	.obj_free = zcache_obj_free,
-	.objnode_alloc = zcache_objnode_alloc,
-	.objnode_free = zcache_objnode_free,
-};
-
-/*
- * zcache implementations for PAM page descriptor ops
- */
-
-static atomic_t zcache_curr_eph_pampd_count = ATOMIC_INIT(0);
-static unsigned long zcache_curr_eph_pampd_count_max;
-static atomic_t zcache_curr_pers_pampd_count = ATOMIC_INIT(0);
-static unsigned long zcache_curr_pers_pampd_count_max;
-
-/* forward reference */
-static int zcache_compress(struct page *from, void **out_va, size_t *out_len);
-
-static void *zcache_pampd_create(struct tmem_pool *pool, struct tmem_oid *oid,
-				 uint32_t index, struct page *page)
-{
-	void *pampd = NULL, *cdata;
-	size_t clen;
-	int ret;
-	bool ephemeral = is_ephemeral(pool);
-	unsigned long count;
-
-	if (ephemeral) {
-		ret = zcache_compress(page, &cdata, &clen);
-		if (ret == 0)
-
-			goto out;
-		if (clen == 0 || clen > zbud_max_buddy_size()) {
-			zcache_compress_poor++;
-			goto out;
-		}
-		pampd = (void *)zbud_create(pool->pool_id, oid, index,
-						page, cdata, clen);
-		if (pampd != NULL) {
-			count = atomic_inc_return(&zcache_curr_eph_pampd_count);
-			if (count > zcache_curr_eph_pampd_count_max)
-				zcache_curr_eph_pampd_count_max = count;
-		}
-	} else {
-		/*
-		 * FIXME: This is all the "policy" there is for now.
-		 * 3/4 totpages should allow ~37% of RAM to be filled with
-		 * compressed frontswap pages
-		 */
-		if (atomic_read(&zcache_curr_pers_pampd_count) >
-							3 * totalram_pages / 4)
-			goto out;
-		ret = zcache_compress(page, &cdata, &clen);
-		if (ret == 0)
-			goto out;
-		if (clen > zv_max_page_size) {
-			zcache_compress_poor++;
-			goto out;
-		}
-		pampd = (void *)zv_create(zcache_client.xvpool, pool->pool_id,
-						oid, index, cdata, clen);
-		if (pampd == NULL)
-			goto out;
-		count = atomic_inc_return(&zcache_curr_pers_pampd_count);
-		if (count > zcache_curr_pers_pampd_count_max)
-			zcache_curr_pers_pampd_count_max = count;
-	}
-out:
-	return pampd;
-}
-
-/*
- * fill the pageframe corresponding to the struct page with the data
- * from the passed pampd
- */
-static int zcache_pampd_get_data(struct page *page, void *pampd,
-						struct tmem_pool *pool)
-{
-	int ret = 0;
-
-	if (is_ephemeral(pool))
-		ret = zbud_decompress(page, pampd);
-	else
-		zv_decompress(page, pampd);
-	return ret;
-}
-
-/*
- * free the pampd and remove it from any zcache lists
- * pampd must no longer be pointed to from any tmem data structures!
- */
-static void zcache_pampd_free(void *pampd, struct tmem_pool *pool)
-{
-	if (is_ephemeral(pool)) {
-		zbud_free_and_delist((struct zbud_hdr *)pampd);
-		atomic_dec(&zcache_curr_eph_pampd_count);
-		BUG_ON(atomic_read(&zcache_curr_eph_pampd_count) < 0);
-	} else {
-		zv_free(zcache_client.xvpool, (struct zv_hdr *)pampd);
-		atomic_dec(&zcache_curr_pers_pampd_count);
-		BUG_ON(atomic_read(&zcache_curr_pers_pampd_count) < 0);
-	}
-}
-
-static struct tmem_pamops zcache_pamops = {
-	.create = zcache_pampd_create,
-	.get_data = zcache_pampd_get_data,
-	.free = zcache_pampd_free,
-};
-
-/*
- * zcache compression/decompression and related per-cpu stuff
- */
-
-#define LZO_WORKMEM_BYTES LZO1X_1_MEM_COMPRESS
-#define LZO_DSTMEM_PAGE_ORDER 1
-static DEFINE_PER_CPU(unsigned char *, zcache_workmem);
-static DEFINE_PER_CPU(unsigned char *, zcache_dstmem);
-
-static int zcache_compress(struct page *from, void **out_va, size_t *out_len)
-{
-	int ret = 0;
-	unsigned char *dmem = __get_cpu_var(zcache_dstmem);
-	unsigned char *wmem = __get_cpu_var(zcache_workmem);
-	char *from_va;
-
-	BUG_ON(!irqs_disabled());
-	if (unlikely(dmem == NULL || wmem == NULL))
-		goto out;  /* no buffer, so can't compress */
-	from_va = kmap_atomic(from, KM_USER0);
-	mb();
-	ret = lzo1x_1_compress(from_va, PAGE_SIZE, dmem, out_len, wmem);
-	BUG_ON(ret != LZO_E_OK);
-	*out_va = dmem;
-	kunmap_atomic(from_va, KM_USER0);
-	ret = 1;
-out:
-	return ret;
-}
-
-
-static int zcache_cpu_notifier(struct notifier_block *nb,
-				unsigned long action, void *pcpu)
-{
-	int cpu = (long)pcpu;
-	struct zcache_preload *kp;
-
-	switch (action) {
-	case CPU_UP_PREPARE:
-		per_cpu(zcache_dstmem, cpu) = (void *)__get_free_pages(
-			GFP_KERNEL | __GFP_REPEAT,
-			LZO_DSTMEM_PAGE_ORDER),
-		per_cpu(zcache_workmem, cpu) =
-			kzalloc(LZO1X_MEM_COMPRESS,
-				GFP_KERNEL | __GFP_REPEAT);
-		break;
-	case CPU_DEAD:
-	case CPU_UP_CANCELED:
-		free_pages((unsigned long)per_cpu(zcache_dstmem, cpu),
-				LZO_DSTMEM_PAGE_ORDER);
-		per_cpu(zcache_dstmem, cpu) = NULL;
-		kfree(per_cpu(zcache_workmem, cpu));
-		per_cpu(zcache_workmem, cpu) = NULL;
-		kp = &per_cpu(zcache_preloads, cpu);
-		while (kp->nr) {
-			kmem_cache_free(zcache_objnode_cache,
-					kp->objnodes[kp->nr - 1]);
-			kp->objnodes[kp->nr - 1] = NULL;
-			kp->nr--;
-		}
-		kmem_cache_free(zcache_obj_cache, kp->obj);
-		free_page((unsigned long)kp->page);
-		break;
-	default:
-		break;
-	}
-	return NOTIFY_OK;
-}
-
-static struct notifier_block zcache_cpu_notifier_block = {
-	.notifier_call = zcache_cpu_notifier
-};
-
-#ifdef CONFIG_SYSFS
-#define ZCACHE_SYSFS_RO(_name) \
-	static ssize_t zcache_##_name##_show(struct kobject *kobj, \
-				struct kobj_attribute *attr, char *buf) \
-	{ \
-		return sprintf(buf, "%lu\n", zcache_##_name); \
-	} \
-	static struct kobj_attribute zcache_##_name##_attr = { \
-		.attr = { .name = __stringify(_name), .mode = 0444 }, \
-		.show = zcache_##_name##_show, \
-	}
-
-#define ZCACHE_SYSFS_RO_ATOMIC(_name) \
-	static ssize_t zcache_##_name##_show(struct kobject *kobj, \
-				struct kobj_attribute *attr, char *buf) \
-	{ \
-	    return sprintf(buf, "%d\n", atomic_read(&zcache_##_name)); \
-	} \
-	static struct kobj_attribute zcache_##_name##_attr = { \
-		.attr = { .name = __stringify(_name), .mode = 0444 }, \
-		.show = zcache_##_name##_show, \
-	}
-
-#define ZCACHE_SYSFS_RO_CUSTOM(_name, _func) \
-	static ssize_t zcache_##_name##_show(struct kobject *kobj, \
-				struct kobj_attribute *attr, char *buf) \
-	{ \
-	    return _func(buf); \
-	} \
-	static struct kobj_attribute zcache_##_name##_attr = { \
-		.attr = { .name = __stringify(_name), .mode = 0444 }, \
-		.show = zcache_##_name##_show, \
-	}
-
-ZCACHE_SYSFS_RO(curr_obj_count_max);
-ZCACHE_SYSFS_RO(curr_objnode_count_max);
-ZCACHE_SYSFS_RO(flush_total);
-ZCACHE_SYSFS_RO(flush_found);
-ZCACHE_SYSFS_RO(flobj_total);
-ZCACHE_SYSFS_RO(flobj_found);
-ZCACHE_SYSFS_RO(failed_eph_puts);
-ZCACHE_SYSFS_RO(failed_pers_puts);
-ZCACHE_SYSFS_RO(zbud_curr_zbytes);
-ZCACHE_SYSFS_RO(zbud_cumul_zpages);
-ZCACHE_SYSFS_RO(zbud_cumul_zbytes);
-ZCACHE_SYSFS_RO(zbud_buddied_count);
-ZCACHE_SYSFS_RO(zbpg_unused_list_count);
-ZCACHE_SYSFS_RO(evicted_raw_pages);
-ZCACHE_SYSFS_RO(evicted_unbuddied_pages);
-ZCACHE_SYSFS_RO(evicted_buddied_pages);
-ZCACHE_SYSFS_RO(failed_get_free_pages);
-ZCACHE_SYSFS_RO(failed_alloc);
-ZCACHE_SYSFS_RO(put_to_flush);
-ZCACHE_SYSFS_RO(aborted_preload);
-ZCACHE_SYSFS_RO(aborted_shrink);
-ZCACHE_SYSFS_RO(compress_poor);
-ZCACHE_SYSFS_RO_ATOMIC(zbud_curr_raw_pages);
-ZCACHE_SYSFS_RO_ATOMIC(zbud_curr_zpages);
-ZCACHE_SYSFS_RO_ATOMIC(curr_obj_count);
-ZCACHE_SYSFS_RO_ATOMIC(curr_objnode_count);
-ZCACHE_SYSFS_RO_CUSTOM(zbud_unbuddied_list_counts,
-			zbud_show_unbuddied_list_counts);
-ZCACHE_SYSFS_RO_CUSTOM(zbud_cumul_chunk_counts,
-			zbud_show_cumul_chunk_counts);
-
-static struct attribute *zcache_attrs[] = {
-	&zcache_curr_obj_count_attr.attr,
-	&zcache_curr_obj_count_max_attr.attr,
-	&zcache_curr_objnode_count_attr.attr,
-	&zcache_curr_objnode_count_max_attr.attr,
-	&zcache_flush_total_attr.attr,
-	&zcache_flobj_total_attr.attr,
-	&zcache_flush_found_attr.attr,
-	&zcache_flobj_found_attr.attr,
-	&zcache_failed_eph_puts_attr.attr,
-	&zcache_failed_pers_puts_attr.attr,
-	&zcache_compress_poor_attr.attr,
-	&zcache_zbud_curr_raw_pages_attr.attr,
-	&zcache_zbud_curr_zpages_attr.attr,
-	&zcache_zbud_curr_zbytes_attr.attr,
-	&zcache_zbud_cumul_zpages_attr.attr,
-	&zcache_zbud_cumul_zbytes_attr.attr,
-	&zcache_zbud_buddied_count_attr.attr,
-	&zcache_zbpg_unused_list_count_attr.attr,
-	&zcache_evicted_raw_pages_attr.attr,
-	&zcache_evicted_unbuddied_pages_attr.attr,
-	&zcache_evicted_buddied_pages_attr.attr,
-	&zcache_failed_get_free_pages_attr.attr,
-	&zcache_failed_alloc_attr.attr,
-	&zcache_put_to_flush_attr.attr,
-	&zcache_aborted_preload_attr.attr,
-	&zcache_aborted_shrink_attr.attr,
-	&zcache_zbud_unbuddied_list_counts_attr.attr,
-	&zcache_zbud_cumul_chunk_counts_attr.attr,
-	NULL,
-};
-
-static struct attribute_group zcache_attr_group = {
-	.attrs = zcache_attrs,
-	.name = "zcache",
-};
-
-#endif /* CONFIG_SYSFS */
-/*
- * When zcache is disabled ("frozen"), pools can be created and destroyed,
- * but all puts (and thus all other operations that require memory allocation)
- * must fail.  If zcache is unfrozen, accepts puts, then frozen again,
- * data consistency requires all puts while frozen to be converted into
- * flushes.
- */
-static bool zcache_freeze;
-
-/*
- * zcache shrinker interface (only useful for ephemeral pages, so zbud only)
- */
-static int shrink_zcache_memory(struct shrinker *shrink,
-				struct shrink_control *sc)
-{
-	int ret = -1;
-	int nr = sc->nr_to_scan;
-	gfp_t gfp_mask = sc->gfp_mask;
-
-	if (nr >= 0) {
-		if (!(gfp_mask & __GFP_FS))
-			/* does this case really need to be skipped? */
-			goto out;
-		if (spin_trylock(&zcache_direct_reclaim_lock)) {
-			zbud_evict_pages(nr);
-			spin_unlock(&zcache_direct_reclaim_lock);
-		} else
-			zcache_aborted_shrink++;
-	}
-	ret = (int)atomic_read(&zcache_zbud_curr_raw_pages);
-out:
-	return ret;
-}
-
-static struct shrinker zcache_shrinker = {
-	.shrink = shrink_zcache_memory,
-	.seeks = DEFAULT_SEEKS,
-};
-
-/*
- * zcache shims between cleancache/frontswap ops and tmem
- */
-
-static int zcache_put_page(int pool_id, struct tmem_oid *oidp,
-				uint32_t index, struct page *page)
-{
-	struct tmem_pool *pool;
-	int ret = -1;
-
-	BUG_ON(!irqs_disabled());
-	pool = zcache_get_pool_by_id(pool_id);
-	if (unlikely(pool == NULL))
-		goto out;
-	if (!zcache_freeze && zcache_do_preload(pool) == 0) {
-		/* preload does preempt_disable on success */
-		ret = tmem_put(pool, oidp, index, page);
-		if (ret < 0) {
-			if (is_ephemeral(pool))
-				zcache_failed_eph_puts++;
-			else
-				zcache_failed_pers_puts++;
-		}
-		zcache_put_pool(pool);
-		preempt_enable_no_resched();
-	} else {
-		zcache_put_to_flush++;
-		if (atomic_read(&pool->obj_count) > 0)
-			/* the put fails whether the flush succeeds or not */
-			(void)tmem_flush_page(pool, oidp, index);
-		zcache_put_pool(pool);
-	}
-out:
-	return ret;
-}
-
-static int zcache_get_page(int pool_id, struct tmem_oid *oidp,
-				uint32_t index, struct page *page)
-{
-	struct tmem_pool *pool;
-	int ret = -1;
-	unsigned long flags;
-
-	local_irq_save(flags);
-	pool = zcache_get_pool_by_id(pool_id);
-	if (likely(pool != NULL)) {
-		if (atomic_read(&pool->obj_count) > 0)
-			ret = tmem_get(pool, oidp, index, page);
-		zcache_put_pool(pool);
-	}
-	local_irq_restore(flags);
-	return ret;
-}
-
-static int zcache_flush_page(int pool_id, struct tmem_oid *oidp, uint32_t index)
-{
-	struct tmem_pool *pool;
-	int ret = -1;
-	unsigned long flags;
-
-	local_irq_save(flags);
-	zcache_flush_total++;
-	pool = zcache_get_pool_by_id(pool_id);
-	if (likely(pool != NULL)) {
-		if (atomic_read(&pool->obj_count) > 0)
-			ret = tmem_flush_page(pool, oidp, index);
-		zcache_put_pool(pool);
-	}
-	if (ret >= 0)
-		zcache_flush_found++;
-	local_irq_restore(flags);
-	return ret;
-}
-
-static int zcache_flush_object(int pool_id, struct tmem_oid *oidp)
-{
-	struct tmem_pool *pool;
-	int ret = -1;
-	unsigned long flags;
-
-	local_irq_save(flags);
-	zcache_flobj_total++;
-	pool = zcache_get_pool_by_id(pool_id);
-	if (likely(pool != NULL)) {
-		if (atomic_read(&pool->obj_count) > 0)
-			ret = tmem_flush_object(pool, oidp);
-		zcache_put_pool(pool);
-	}
-	if (ret >= 0)
-		zcache_flobj_found++;
-	local_irq_restore(flags);
-	return ret;
-}
-
-static int zcache_destroy_pool(int pool_id)
-{
-	struct tmem_pool *pool = NULL;
-	int ret = -1;
-
-	if (pool_id < 0)
-		goto out;
-	pool = zcache_client.tmem_pools[pool_id];
-	if (pool == NULL)
-		goto out;
-	zcache_client.tmem_pools[pool_id] = NULL;
-	/* wait for pool activity on other cpus to quiesce */
-	while (atomic_read(&pool->refcount) != 0)
-		;
-	local_bh_disable();
-	ret = tmem_destroy_pool(pool);
-	local_bh_enable();
-	kfree(pool);
-	pr_info("zcache: destroyed pool id=%d\n", pool_id);
-out:
-	return ret;
-}
-
-static int zcache_new_pool(uint32_t flags)
-{
-	int poolid = -1;
-	struct tmem_pool *pool;
-
-	pool = kmalloc(sizeof(struct tmem_pool), GFP_KERNEL);
-	if (pool == NULL) {
-		pr_info("zcache: pool creation failed: out of memory\n");
-		goto out;
-	}
-
-	for (poolid = 0; poolid < MAX_POOLS_PER_CLIENT; poolid++)
-		if (zcache_client.tmem_pools[poolid] == NULL)
-			break;
-	if (poolid >= MAX_POOLS_PER_CLIENT) {
-		pr_info("zcache: pool creation failed: max exceeded\n");
-		kfree(pool);
-		poolid = -1;
-		goto out;
-	}
-	atomic_set(&pool->refcount, 0);
-	pool->client = &zcache_client;
-	pool->pool_id = poolid;
-	tmem_new_pool(pool, flags);
-	zcache_client.tmem_pools[poolid] = pool;
-	pr_info("zcache: created %s tmem pool, id=%d\n",
-		flags & TMEM_POOL_PERSIST ? "persistent" : "ephemeral",
-		poolid);
-out:
-	return poolid;
-}
-
-/**********
- * Two kernel functionalities currently can be layered on top of tmem.
- * These are "cleancache" which is used as a second-chance cache for clean
- * page cache pages; and "frontswap" which is used for swap pages
- * to avoid writes to disk.  A generic "shim" is provided here for each
- * to translate in-kernel semantics to zcache semantics.
- */
-
-#ifdef CONFIG_CLEANCACHE
-static void zcache_cleancache_put_page(int pool_id,
-					struct cleancache_filekey key,
-					pgoff_t index, struct page *page)
-{
-	u32 ind = (u32) index;
-	struct tmem_oid oid = *(struct tmem_oid *)&key;
-
-	if (likely(ind == index))
-		(void)zcache_put_page(pool_id, &oid, index, page);
-}
-
-static int zcache_cleancache_get_page(int pool_id,
-					struct cleancache_filekey key,
-					pgoff_t index, struct page *page)
-{
-	u32 ind = (u32) index;
-	struct tmem_oid oid = *(struct tmem_oid *)&key;
-	int ret = -1;
-
-	if (likely(ind == index))
-		ret = zcache_get_page(pool_id, &oid, index, page);
-	return ret;
-}
-
-static void zcache_cleancache_flush_page(int pool_id,
-					struct cleancache_filekey key,
-					pgoff_t index)
-{
-	u32 ind = (u32) index;
-	struct tmem_oid oid = *(struct tmem_oid *)&key;
-
-	if (likely(ind == index))
-		(void)zcache_flush_page(pool_id, &oid, ind);
-}
-
-static void zcache_cleancache_flush_inode(int pool_id,
-					struct cleancache_filekey key)
-{
-	struct tmem_oid oid = *(struct tmem_oid *)&key;
-
-	(void)zcache_flush_object(pool_id, &oid);
-}
-
-static void zcache_cleancache_flush_fs(int pool_id)
-{
-	if (pool_id >= 0)
-		(void)zcache_destroy_pool(pool_id);
-}
-
-static int zcache_cleancache_init_fs(size_t pagesize)
-{
-	BUG_ON(sizeof(struct cleancache_filekey) !=
-				sizeof(struct tmem_oid));
-	BUG_ON(pagesize != PAGE_SIZE);
-	return zcache_new_pool(0);
-}
-
-static int zcache_cleancache_init_shared_fs(char *uuid, size_t pagesize)
-{
-	/* shared pools are unsupported and map to private */
-	BUG_ON(sizeof(struct cleancache_filekey) !=
-				sizeof(struct tmem_oid));
-	BUG_ON(pagesize != PAGE_SIZE);
-	return zcache_new_pool(0);
-}
-
-static struct cleancache_ops zcache_cleancache_ops = {
-	.put_page = zcache_cleancache_put_page,
-	.get_page = zcache_cleancache_get_page,
-	.flush_page = zcache_cleancache_flush_page,
-	.flush_inode = zcache_cleancache_flush_inode,
-	.flush_fs = zcache_cleancache_flush_fs,
-	.init_shared_fs = zcache_cleancache_init_shared_fs,
-	.init_fs = zcache_cleancache_init_fs
-};
-
-struct cleancache_ops zcache_cleancache_register_ops(void)
-{
-	struct cleancache_ops old_ops =
-		cleancache_register_ops(&zcache_cleancache_ops);
-
-	return old_ops;
-}
-#endif
-
-#ifdef CONFIG_FRONTSWAP
-/* a single tmem poolid is used for all frontswap "types" (swapfiles) */
-static int zcache_frontswap_poolid = -1;
-
-/*
- * Swizzling increases objects per swaptype, increasing tmem concurrency
- * for heavy swaploads.  Later, larger nr_cpus -> larger SWIZ_BITS
- */
-#define SWIZ_BITS		4
-#define SWIZ_MASK		((1 << SWIZ_BITS) - 1)
-#define _oswiz(_type, _ind)	((_type << SWIZ_BITS) | (_ind & SWIZ_MASK))
-#define iswiz(_ind)		(_ind >> SWIZ_BITS)
-
-static inline struct tmem_oid oswiz(unsigned type, u32 ind)
-{
-	struct tmem_oid oid = { .oid = { 0 } };
-	oid.oid[0] = _oswiz(type, ind);
-	return oid;
-}
-
-static int zcache_frontswap_put_page(unsigned type, pgoff_t offset,
-				   struct page *page)
-{
-	u64 ind64 = (u64)offset;
-	u32 ind = (u32)offset;
-	struct tmem_oid oid = oswiz(type, ind);
-	int ret = -1;
-	unsigned long flags;
-
-	BUG_ON(!PageLocked(page));
-	if (likely(ind64 == ind)) {
-		local_irq_save(flags);
-		ret = zcache_put_page(zcache_frontswap_poolid, &oid,
-					iswiz(ind), page);
-		local_irq_restore(flags);
-	}
-	return ret;
-}
-
-/* returns 0 if the page was successfully gotten from frontswap, -1 if
- * was not present (should never happen!) */
-static int zcache_frontswap_get_page(unsigned type, pgoff_t offset,
-				   struct page *page)
-{
-	u64 ind64 = (u64)offset;
-	u32 ind = (u32)offset;
-	struct tmem_oid oid = oswiz(type, ind);
-	int ret = -1;
-
-	BUG_ON(!PageLocked(page));
-	if (likely(ind64 == ind))
-		ret = zcache_get_page(zcache_frontswap_poolid, &oid,
-					iswiz(ind), page);
-	return ret;
-}
-
-/* flush a single page from frontswap */
-static void zcache_frontswap_flush_page(unsigned type, pgoff_t offset)
-{
-	u64 ind64 = (u64)offset;
-	u32 ind = (u32)offset;
-	struct tmem_oid oid = oswiz(type, ind);
-
-	if (likely(ind64 == ind))
-		(void)zcache_flush_page(zcache_frontswap_poolid, &oid,
-					iswiz(ind));
-}
-
-/* flush all pages from the passed swaptype */
-static void zcache_frontswap_flush_area(unsigned type)
-{
-	struct tmem_oid oid;
-	int ind;
-
-	for (ind = SWIZ_MASK; ind >= 0; ind--) {
-		oid = oswiz(type, ind);
-		(void)zcache_flush_object(zcache_frontswap_poolid, &oid);
-	}
-}
-
-static void zcache_frontswap_init(unsigned ignored)
-{
-	/* a single tmem poolid is used for all frontswap "types" (swapfiles) */
-	if (zcache_frontswap_poolid < 0)
-		zcache_frontswap_poolid = zcache_new_pool(TMEM_POOL_PERSIST);
-}
-
-static struct frontswap_ops zcache_frontswap_ops = {
-	.put_page = zcache_frontswap_put_page,
-	.get_page = zcache_frontswap_get_page,
-	.flush_page = zcache_frontswap_flush_page,
-	.flush_area = zcache_frontswap_flush_area,
-	.init = zcache_frontswap_init
-};
-
-struct frontswap_ops zcache_frontswap_register_ops(void)
-{
-	struct frontswap_ops old_ops =
-		frontswap_register_ops(&zcache_frontswap_ops);
-
-	return old_ops;
-}
-#endif
-
-/*
- * zcache initialization
- * NOTE FOR NOW zcache MUST BE PROVIDED AS A KERNEL BOOT PARAMETER OR
- * NOTHING HAPPENS!
- */
-
-static int zcache_enabled;
-
-static int __init enable_zcache(char *s)
-{
-	zcache_enabled = 1;
-	return 1;
-}
-__setup("zcache", enable_zcache);
-
-/* allow independent dynamic disabling of cleancache and frontswap */
-
-static int use_cleancache = 1;
-
-static int __init no_cleancache(char *s)
-{
-	use_cleancache = 0;
-	return 1;
-}
-
-__setup("nocleancache", no_cleancache);
-
-static int use_frontswap = 1;
-
-static int __init no_frontswap(char *s)
-{
-	use_frontswap = 0;
-	return 1;
-}
-
-__setup("nofrontswap", no_frontswap);
-
-static int __init zcache_init(void)
-{
-#ifdef CONFIG_SYSFS
-	int ret = 0;
-
-	ret = sysfs_create_group(mm_kobj, &zcache_attr_group);
-	if (ret) {
-		pr_err("zcache: can't create sysfs\n");
-		goto out;
-	}
-#endif /* CONFIG_SYSFS */
-#if defined(CONFIG_CLEANCACHE) || defined(CONFIG_FRONTSWAP)
-	if (zcache_enabled) {
-		unsigned int cpu;
-
-		tmem_register_hostops(&zcache_hostops);
-		tmem_register_pamops(&zcache_pamops);
-		ret = register_cpu_notifier(&zcache_cpu_notifier_block);
-		if (ret) {
-			pr_err("zcache: can't register cpu notifier\n");
-			goto out;
-		}
-		for_each_online_cpu(cpu) {
-			void *pcpu = (void *)(long)cpu;
-			zcache_cpu_notifier(&zcache_cpu_notifier_block,
-				CPU_UP_PREPARE, pcpu);
-		}
-	}
-	zcache_objnode_cache = kmem_cache_create("zcache_objnode",
-				sizeof(struct tmem_objnode), 0, 0, NULL);
-	zcache_obj_cache = kmem_cache_create("zcache_obj",
-				sizeof(struct tmem_obj), 0, 0, NULL);
-#endif
-#ifdef CONFIG_CLEANCACHE
-	if (zcache_enabled && use_cleancache) {
-		struct cleancache_ops old_ops;
-
-		zbud_init();
-		register_shrinker(&zcache_shrinker);
-		old_ops = zcache_cleancache_register_ops();
-		pr_info("zcache: cleancache enabled using kernel "
-			"transcendent memory and compression buddies\n");
-		if (old_ops.init_fs != NULL)
-			pr_warning("zcache: cleancache_ops overridden");
-	}
-#endif
-#ifdef CONFIG_FRONTSWAP
-	if (zcache_enabled && use_frontswap) {
-		struct frontswap_ops old_ops;
-
-		zcache_client.xvpool = xv_create_pool();
-		if (zcache_client.xvpool == NULL) {
-			pr_err("zcache: can't create xvpool\n");
-			goto out;
-		}
-		old_ops = zcache_frontswap_register_ops();
-		pr_info("zcache: frontswap enabled using kernel "
-			"transcendent memory and xvmalloc\n");
-		if (old_ops.init != NULL)
-			pr_warning("ktmem: frontswap_ops overridden");
-	}
-#endif
-out:
-	return ret;
-}
-
-module_init(zcache_init)

Re: Cleancache [3/3]

[dexen deVries]

[-- Attachment #1: Type: Text/Plain, Size: 579 bytes --]

On Monday 13 June 2011 16:40:48 you wrote:
> So, you hit the bug on a raw hadrware.
> In my hardware, /sys/kernel/mm/cleancache/* didn't change.

which most probably means you haven't had zcache enabled, due to the bug in 
its build system (as described in prev mail).


Attached is the silly patch I've used to enable cleancache for NILFS2. I have 
virtually no experience with in-kernel programming, so it may be very, very 
wrong. Terribly sorry in advance...


Happy hacking, Ryusuke,
-- 
dexen deVries

``One can't proceed from the informal to the formal by formal means.''

[-- Attachment #2: nilfs-cleancache-simplistic-enable.patch --]
[-- Type: text/x-patch, Size: 515 bytes --]

diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 8351c44..57022bc 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -48,6 +48,7 @@
 #include <linux/writeback.h>
 #include <linux/seq_file.h>
 #include <linux/mount.h>
+#include <linux/cleancache.h>
 #include "nilfs.h"
 #include "export.h"
 #include "mdt.h"
@@ -1296,6 +1297,7 @@ nilfs_mount(struct file_system_type *fs_type, int flags,
 		err = PTR_ERR(s);
 		goto failed;
 	}
+	cleancache_init_fs(s);
 
 	if (!s->s_root) {
 		char b[BDEVNAME_SIZE];

Re: Cleancache [kernel config]

[dexen deVries]

[-- Attachment #1: Type: Text/Plain, Size: 223 bytes --]

Attached is the kernel config I've used for testing this problem.

The machine is some generic Core 2 Duo in 64bit mode; GCC 4.5.2


-- 
dexen deVries

``One can't proceed from the informal to the formal by formal means.''

[-- Attachment #2: nilfs-cleancache-foobar.config --]
[-- Type: text/x-mpsub, Size: 64318 bytes --]

#
# Automatically generated make config: don't edit
# Linux/x86_64 3.0.0-rc2 Kernel Configuration
#
CONFIG_64BIT=y
# CONFIG_X86_32 is not set
CONFIG_X86_64=y
CONFIG_X86=y
CONFIG_INSTRUCTION_DECODER=y
CONFIG_OUTPUT_FORMAT="elf64-x86-64"
CONFIG_ARCH_DEFCONFIG="arch/x86/configs/x86_64_defconfig"
CONFIG_GENERIC_CMOS_UPDATE=y
CONFIG_CLOCKSOURCE_WATCHDOG=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_HAVE_LATENCYTOP_SUPPORT=y
CONFIG_MMU=y
CONFIG_ZONE_DMA=y
CONFIG_NEED_DMA_MAP_STATE=y
CONFIG_NEED_SG_DMA_LENGTH=y
CONFIG_GENERIC_ISA_DMA=y
CONFIG_GENERIC_IOMAP=y
CONFIG_GENERIC_BUG=y
CONFIG_GENERIC_BUG_RELATIVE_POINTERS=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_ARCH_MAY_HAVE_PC_FDC=y
# CONFIG_RWSEM_GENERIC_SPINLOCK is not set
CONFIG_RWSEM_XCHGADD_ALGORITHM=y
CONFIG_ARCH_HAS_CPU_IDLE_WAIT=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
CONFIG_GENERIC_TIME_VSYSCALL=y
CONFIG_ARCH_HAS_CPU_RELAX=y
CONFIG_ARCH_HAS_DEFAULT_IDLE=y
CONFIG_ARCH_HAS_CACHE_LINE_SIZE=y
CONFIG_HAVE_SETUP_PER_CPU_AREA=y
CONFIG_NEED_PER_CPU_EMBED_FIRST_CHUNK=y
CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK=y
CONFIG_HAVE_CPUMASK_OF_CPU_MAP=y
CONFIG_ARCH_HIBERNATION_POSSIBLE=y
CONFIG_ARCH_SUSPEND_POSSIBLE=y
CONFIG_ZONE_DMA32=y
CONFIG_ARCH_POPULATES_NODE_MAP=y
CONFIG_AUDIT_ARCH=y
CONFIG_ARCH_SUPPORTS_OPTIMIZED_INLINING=y
CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC=y
CONFIG_HAVE_INTEL_TXT=y
CONFIG_X86_64_SMP=y
CONFIG_X86_HT=y
CONFIG_ARCH_HWEIGHT_CFLAGS="-fcall-saved-rdi -fcall-saved-rsi -fcall-saved-rdx -fcall-saved-rcx -fcall-saved-r8 -fcall-saved-r9 -fcall-saved-r10 -fcall-saved-r11"
# CONFIG_KTIME_SCALAR is not set
CONFIG_ARCH_CPU_PROBE_RELEASE=y
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
CONFIG_CONSTRUCTORS=y
CONFIG_HAVE_IRQ_WORK=y
CONFIG_IRQ_WORK=y

#
# General setup
#
CONFIG_EXPERIMENTAL=y
CONFIG_INIT_ENV_ARG_LIMIT=32
CONFIG_CROSS_COMPILE=""
CONFIG_LOCALVERSION="-l28cc_n_t"
# CONFIG_LOCALVERSION_AUTO is not set
CONFIG_HAVE_KERNEL_GZIP=y
CONFIG_HAVE_KERNEL_BZIP2=y
CONFIG_HAVE_KERNEL_LZMA=y
CONFIG_HAVE_KERNEL_XZ=y
CONFIG_HAVE_KERNEL_LZO=y
CONFIG_KERNEL_GZIP=y
# CONFIG_KERNEL_BZIP2 is not set
# CONFIG_KERNEL_LZMA is not set
# CONFIG_KERNEL_XZ is not set
# CONFIG_KERNEL_LZO is not set
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SYSCTL=y
CONFIG_POSIX_MQUEUE=y
CONFIG_POSIX_MQUEUE_SYSCTL=y
# CONFIG_BSD_PROCESS_ACCT is not set
CONFIG_FHANDLE=y
# CONFIG_TASKSTATS is not set
# CONFIG_AUDIT is not set
CONFIG_HAVE_GENERIC_HARDIRQS=y

#
# IRQ subsystem
#
CONFIG_GENERIC_HARDIRQS=y
CONFIG_HAVE_SPARSE_IRQ=y
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_GENERIC_IRQ_SHOW=y
CONFIG_GENERIC_PENDING_IRQ=y
CONFIG_IRQ_FORCED_THREADING=y
# CONFIG_SPARSE_IRQ is not set

#
# RCU Subsystem
#
CONFIG_TREE_PREEMPT_RCU=y
CONFIG_PREEMPT_RCU=y
# CONFIG_RCU_TRACE is not set
CONFIG_RCU_FANOUT=32
# CONFIG_RCU_FANOUT_EXACT is not set
# CONFIG_TREE_RCU_TRACE is not set
# CONFIG_RCU_BOOST is not set
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_LOG_BUF_SHIFT=18
CONFIG_HAVE_UNSTABLE_SCHED_CLOCK=y
CONFIG_CGROUPS=y
# CONFIG_CGROUP_DEBUG is not set
# CONFIG_CGROUP_FREEZER is not set
# CONFIG_CGROUP_DEVICE is not set
# CONFIG_CPUSETS is not set
CONFIG_CGROUP_CPUACCT=y
CONFIG_RESOURCE_COUNTERS=y
CONFIG_CGROUP_MEM_RES_CTLR=y
CONFIG_CGROUP_MEM_RES_CTLR_SWAP=y
CONFIG_CGROUP_MEM_RES_CTLR_SWAP_ENABLED=y
# CONFIG_CGROUP_PERF is not set
CONFIG_CGROUP_SCHED=y
CONFIG_FAIR_GROUP_SCHED=y
CONFIG_RT_GROUP_SCHED=y
CONFIG_BLK_CGROUP=y
# CONFIG_DEBUG_BLK_CGROUP is not set
CONFIG_NAMESPACES=y
# CONFIG_UTS_NS is not set
# CONFIG_IPC_NS is not set
# CONFIG_USER_NS is not set
# CONFIG_PID_NS is not set
# CONFIG_NET_NS is not set
CONFIG_SCHED_AUTOGROUP=y
CONFIG_MM_OWNER=y
# CONFIG_SYSFS_DEPRECATED is not set
# CONFIG_RELAY is not set
# CONFIG_BLK_DEV_INITRD is not set
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
CONFIG_SYSCTL=y
CONFIG_ANON_INODES=y
# CONFIG_EXPERT is not set
CONFIG_UID16=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS=y
# CONFIG_KALLSYMS_ALL is not set
CONFIG_HOTPLUG=y
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
CONFIG_PCSPKR_PLATFORM=y
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_AIO=y
# CONFIG_EMBEDDED is not set
CONFIG_HAVE_PERF_EVENTS=y

#
# Kernel Performance Events And Counters
#
CONFIG_PERF_EVENTS=y
# CONFIG_PERF_COUNTERS is not set
# CONFIG_DEBUG_PERF_USE_VMALLOC is not set
CONFIG_VM_EVENT_COUNTERS=y
CONFIG_PCI_QUIRKS=y
CONFIG_SLUB_DEBUG=y
# CONFIG_COMPAT_BRK is not set
# CONFIG_SLAB is not set
CONFIG_SLUB=y
# CONFIG_PROFILING is not set
CONFIG_HAVE_OPROFILE=y
# CONFIG_KPROBES is not set
CONFIG_JUMP_LABEL=y
CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS=y
CONFIG_HAVE_IOREMAP_PROT=y
CONFIG_HAVE_KPROBES=y
CONFIG_HAVE_KRETPROBES=y
CONFIG_HAVE_OPTPROBES=y
CONFIG_HAVE_ARCH_TRACEHOOK=y
CONFIG_HAVE_DMA_ATTRS=y
CONFIG_USE_GENERIC_SMP_HELPERS=y
CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
CONFIG_HAVE_DMA_API_DEBUG=y
CONFIG_HAVE_HW_BREAKPOINT=y
CONFIG_HAVE_MIXED_BREAKPOINTS_REGS=y
CONFIG_HAVE_USER_RETURN_NOTIFIER=y
CONFIG_HAVE_PERF_EVENTS_NMI=y
CONFIG_HAVE_ARCH_JUMP_LABEL=y

#
# GCOV-based kernel profiling
#
# CONFIG_HAVE_GENERIC_DMA_COHERENT is not set
CONFIG_SLABINFO=y
CONFIG_RT_MUTEXES=y
CONFIG_BASE_SMALL=0
CONFIG_MODULES=y
CONFIG_MODULE_FORCE_LOAD=y
CONFIG_MODULE_UNLOAD=y
CONFIG_MODULE_FORCE_UNLOAD=y
# CONFIG_MODVERSIONS is not set
# CONFIG_MODULE_SRCVERSION_ALL is not set
CONFIG_STOP_MACHINE=y
CONFIG_BLOCK=y
CONFIG_BLK_DEV_BSG=y
# CONFIG_BLK_DEV_INTEGRITY is not set
# CONFIG_BLK_DEV_THROTTLING is not set
CONFIG_BLOCK_COMPAT=y

#
# IO Schedulers
#
CONFIG_IOSCHED_NOOP=y
CONFIG_IOSCHED_DEADLINE=y
CONFIG_IOSCHED_CFQ=y
# CONFIG_CFQ_GROUP_IOSCHED is not set
# CONFIG_DEFAULT_DEADLINE is not set
CONFIG_DEFAULT_CFQ=y
# CONFIG_DEFAULT_NOOP is not set
CONFIG_DEFAULT_IOSCHED="cfq"
# CONFIG_INLINE_SPIN_TRYLOCK is not set
# CONFIG_INLINE_SPIN_TRYLOCK_BH is not set
# CONFIG_INLINE_SPIN_LOCK is not set
# CONFIG_INLINE_SPIN_LOCK_BH is not set
# CONFIG_INLINE_SPIN_LOCK_IRQ is not set
# CONFIG_INLINE_SPIN_LOCK_IRQSAVE is not set
# CONFIG_INLINE_SPIN_UNLOCK is not set
# CONFIG_INLINE_SPIN_UNLOCK_BH is not set
# CONFIG_INLINE_SPIN_UNLOCK_IRQ is not set
# CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE is not set
# CONFIG_INLINE_READ_TRYLOCK is not set
# CONFIG_INLINE_READ_LOCK is not set
# CONFIG_INLINE_READ_LOCK_BH is not set
# CONFIG_INLINE_READ_LOCK_IRQ is not set
# CONFIG_INLINE_READ_LOCK_IRQSAVE is not set
# CONFIG_INLINE_READ_UNLOCK is not set
# CONFIG_INLINE_READ_UNLOCK_BH is not set
# CONFIG_INLINE_READ_UNLOCK_IRQ is not set
# CONFIG_INLINE_READ_UNLOCK_IRQRESTORE is not set
# CONFIG_INLINE_WRITE_TRYLOCK is not set
# CONFIG_INLINE_WRITE_LOCK is not set
# CONFIG_INLINE_WRITE_LOCK_BH is not set
# CONFIG_INLINE_WRITE_LOCK_IRQ is not set
# CONFIG_INLINE_WRITE_LOCK_IRQSAVE is not set
# CONFIG_INLINE_WRITE_UNLOCK is not set
# CONFIG_INLINE_WRITE_UNLOCK_BH is not set
# CONFIG_INLINE_WRITE_UNLOCK_IRQ is not set
# CONFIG_INLINE_WRITE_UNLOCK_IRQRESTORE is not set
CONFIG_MUTEX_SPIN_ON_OWNER=y
CONFIG_FREEZER=y

#
# Processor type and features
#
CONFIG_TICK_ONESHOT=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
CONFIG_SMP=y
# CONFIG_X86_MPPARSE is not set
# CONFIG_X86_EXTENDED_PLATFORM is not set
CONFIG_X86_SUPPORTS_MEMORY_FAILURE=y
CONFIG_SCHED_OMIT_FRAME_POINTER=y
# CONFIG_PARAVIRT_GUEST is not set
CONFIG_NO_BOOTMEM=y
# CONFIG_MEMTEST is not set
# CONFIG_MK8 is not set
# CONFIG_MPSC is not set
CONFIG_MCORE2=y
# CONFIG_MATOM is not set
# CONFIG_GENERIC_CPU is not set
CONFIG_X86_INTERNODE_CACHE_SHIFT=6
CONFIG_X86_CMPXCHG=y
CONFIG_CMPXCHG_LOCAL=y
CONFIG_X86_L1_CACHE_SHIFT=6
CONFIG_X86_XADD=y
CONFIG_X86_WP_WORKS_OK=y
CONFIG_X86_INTEL_USERCOPY=y
CONFIG_X86_USE_PPRO_CHECKSUM=y
CONFIG_X86_P6_NOP=y
CONFIG_X86_TSC=y
CONFIG_X86_CMPXCHG64=y
CONFIG_X86_CMOV=y
CONFIG_X86_MINIMUM_CPU_FAMILY=64
CONFIG_X86_DEBUGCTLMSR=y
CONFIG_CPU_SUP_INTEL=y
CONFIG_CPU_SUP_AMD=y
CONFIG_CPU_SUP_CENTAUR=y
CONFIG_HPET_TIMER=y
CONFIG_HPET_EMULATE_RTC=y
CONFIG_DMI=y
CONFIG_GART_IOMMU=y
# CONFIG_CALGARY_IOMMU is not set
# CONFIG_AMD_IOMMU is not set
CONFIG_SWIOTLB=y
CONFIG_IOMMU_HELPER=y
CONFIG_IOMMU_API=y
# CONFIG_MAXSMP is not set
CONFIG_NR_CPUS=8
# CONFIG_SCHED_SMT is not set
CONFIG_SCHED_MC=y
# CONFIG_IRQ_TIME_ACCOUNTING is not set
# CONFIG_PREEMPT_NONE is not set
# CONFIG_PREEMPT_VOLUNTARY is not set
CONFIG_PREEMPT=y
CONFIG_X86_LOCAL_APIC=y
CONFIG_X86_IO_APIC=y
# CONFIG_X86_REROUTE_FOR_BROKEN_BOOT_IRQS is not set
CONFIG_X86_MCE=y
CONFIG_X86_MCE_INTEL=y
# CONFIG_X86_MCE_AMD is not set
CONFIG_X86_MCE_THRESHOLD=y
# CONFIG_X86_MCE_INJECT is not set
CONFIG_X86_THERMAL_VECTOR=y
# CONFIG_I8K is not set
CONFIG_MICROCODE=y
CONFIG_MICROCODE_INTEL=y
# CONFIG_MICROCODE_AMD is not set
CONFIG_MICROCODE_OLD_INTERFACE=y
CONFIG_X86_MSR=y
CONFIG_X86_CPUID=y
CONFIG_ARCH_PHYS_ADDR_T_64BIT=y
CONFIG_ARCH_DMA_ADDR_T_64BIT=y
CONFIG_DIRECT_GBPAGES=y
# CONFIG_NUMA is not set
CONFIG_ARCH_SPARSEMEM_ENABLE=y
CONFIG_ARCH_SPARSEMEM_DEFAULT=y
CONFIG_ARCH_SELECT_MEMORY_MODEL=y
CONFIG_ARCH_PROC_KCORE_TEXT=y
CONFIG_ILLEGAL_POINTER_VALUE=0xdead000000000000
CONFIG_SELECT_MEMORY_MODEL=y
CONFIG_SPARSEMEM_MANUAL=y
CONFIG_SPARSEMEM=y
CONFIG_HAVE_MEMORY_PRESENT=y
CONFIG_SPARSEMEM_EXTREME=y
CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y
CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER=y
CONFIG_SPARSEMEM_VMEMMAP=y
CONFIG_HAVE_MEMBLOCK=y
# CONFIG_MEMORY_HOTPLUG is not set
CONFIG_PAGEFLAGS_EXTENDED=y
CONFIG_SPLIT_PTLOCK_CPUS=4
CONFIG_COMPACTION=y
CONFIG_MIGRATION=y
CONFIG_PHYS_ADDR_T_64BIT=y
CONFIG_ZONE_DMA_FLAG=1
CONFIG_BOUNCE=y
CONFIG_VIRT_TO_BUS=y
# CONFIG_KSM is not set
CONFIG_DEFAULT_MMAP_MIN_ADDR=4096
CONFIG_ARCH_SUPPORTS_MEMORY_FAILURE=y
# CONFIG_MEMORY_FAILURE is not set
# CONFIG_TRANSPARENT_HUGEPAGE is not set
CONFIG_CLEANCACHE=y
# CONFIG_X86_CHECK_BIOS_CORRUPTION is not set
CONFIG_X86_RESERVE_LOW=64
CONFIG_MTRR=y
CONFIG_MTRR_SANITIZER=y
CONFIG_MTRR_SANITIZER_ENABLE_DEFAULT=1
CONFIG_MTRR_SANITIZER_SPARE_REG_NR_DEFAULT=1
CONFIG_X86_PAT=y
CONFIG_ARCH_USES_PG_UNCACHED=y
# CONFIG_EFI is not set
# CONFIG_SECCOMP is not set
# CONFIG_CC_STACKPROTECTOR is not set
# CONFIG_HZ_100 is not set
# CONFIG_HZ_250 is not set
# CONFIG_HZ_300 is not set
CONFIG_HZ_1000=y
CONFIG_HZ=1000
CONFIG_SCHED_HRTICK=y
CONFIG_KEXEC=y
CONFIG_CRASH_DUMP=y
CONFIG_KEXEC_JUMP=y
CONFIG_PHYSICAL_START=0x1000000
CONFIG_RELOCATABLE=y
CONFIG_PHYSICAL_ALIGN=0x1000000
CONFIG_HOTPLUG_CPU=y
# CONFIG_COMPAT_VDSO is not set
# CONFIG_CMDLINE_BOOL is not set
CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y

#
# Power management and ACPI options
#
CONFIG_ARCH_HIBERNATION_HEADER=y
CONFIG_SUSPEND=y
CONFIG_SUSPEND_FREEZER=y
CONFIG_HIBERNATE_CALLBACKS=y
CONFIG_HIBERNATION=y
CONFIG_PM_STD_PARTITION=""
CONFIG_PM_SLEEP=y
CONFIG_PM_SLEEP_SMP=y
CONFIG_PM_RUNTIME=y
CONFIG_PM=y
# CONFIG_PM_DEBUG is not set
CONFIG_ACPI=y
CONFIG_ACPI_SLEEP=y
CONFIG_ACPI_PROCFS=y
CONFIG_ACPI_PROCFS_POWER=y
# CONFIG_ACPI_EC_DEBUGFS is not set
CONFIG_ACPI_PROC_EVENT=y
CONFIG_ACPI_AC=y
CONFIG_ACPI_BATTERY=y
CONFIG_ACPI_BUTTON=y
CONFIG_ACPI_VIDEO=y
CONFIG_ACPI_FAN=y
CONFIG_ACPI_DOCK=y
CONFIG_ACPI_PROCESSOR=y
CONFIG_ACPI_HOTPLUG_CPU=y
CONFIG_ACPI_PROCESSOR_AGGREGATOR=y
CONFIG_ACPI_THERMAL=y
CONFIG_ACPI_CUSTOM_DSDT_FILE=""
# CONFIG_ACPI_CUSTOM_DSDT is not set
CONFIG_ACPI_BLACKLIST_YEAR=0
# CONFIG_ACPI_DEBUG is not set
# CONFIG_ACPI_PCI_SLOT is not set
CONFIG_X86_PM_TIMER=y
CONFIG_ACPI_CONTAINER=y
# CONFIG_ACPI_SBS is not set
CONFIG_ACPI_HED=y
CONFIG_ACPI_APEI=y
CONFIG_ACPI_APEI_GHES=y
# CONFIG_ACPI_APEI_PCIEAER is not set
# CONFIG_ACPI_APEI_ERST_DEBUG is not set
CONFIG_SFI=y

#
# CPU Frequency scaling
#
CONFIG_CPU_FREQ=y
CONFIG_CPU_FREQ_TABLE=y
CONFIG_CPU_FREQ_STAT=y
CONFIG_CPU_FREQ_STAT_DETAILS=y
CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y
# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE is not set
CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
CONFIG_CPU_FREQ_GOV_POWERSAVE=y
CONFIG_CPU_FREQ_GOV_USERSPACE=y
CONFIG_CPU_FREQ_GOV_ONDEMAND=y
CONFIG_CPU_FREQ_GOV_CONSERVATIVE=y

#
# x86 CPU frequency scaling drivers
#
# CONFIG_X86_PCC_CPUFREQ is not set
CONFIG_X86_ACPI_CPUFREQ=y
# CONFIG_X86_POWERNOW_K8 is not set
# CONFIG_X86_SPEEDSTEP_CENTRINO is not set
# CONFIG_X86_P4_CLOCKMOD is not set

#
# shared options
#
# CONFIG_X86_SPEEDSTEP_LIB is not set
CONFIG_CPU_IDLE=y
CONFIG_CPU_IDLE_GOV_LADDER=y
CONFIG_CPU_IDLE_GOV_MENU=y
CONFIG_INTEL_IDLE=y

#
# Memory power savings
#
# CONFIG_I7300_IDLE is not set

#
# Bus options (PCI etc.)
#
CONFIG_PCI=y
CONFIG_PCI_DIRECT=y
CONFIG_PCI_MMCONFIG=y
CONFIG_PCI_DOMAINS=y
# CONFIG_PCI_CNB20LE_QUIRK is not set
CONFIG_DMAR=y
CONFIG_DMAR_DEFAULT_ON=y
CONFIG_DMAR_FLOPPY_WA=y
# CONFIG_INTR_REMAP is not set
CONFIG_PCIEPORTBUS=y
CONFIG_PCIEAER=y
# CONFIG_PCIE_ECRC is not set
# CONFIG_PCIEAER_INJECT is not set
CONFIG_PCIEASPM=y
# CONFIG_PCIEASPM_DEBUG is not set
CONFIG_PCIE_PME=y
CONFIG_ARCH_SUPPORTS_MSI=y
CONFIG_PCI_MSI=y
# CONFIG_PCI_DEBUG is not set
# CONFIG_PCI_STUB is not set
CONFIG_HT_IRQ=y
# CONFIG_PCI_IOV is not set
CONFIG_PCI_IOAPIC=y
CONFIG_PCI_LABEL=y
CONFIG_ISA_DMA_API=y
CONFIG_AMD_NB=y
# CONFIG_PCCARD is not set
# CONFIG_HOTPLUG_PCI is not set
# CONFIG_RAPIDIO is not set

#
# Executable file formats / Emulations
#
CONFIG_BINFMT_ELF=y
CONFIG_COMPAT_BINFMT_ELF=y
# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
# CONFIG_HAVE_AOUT is not set
# CONFIG_BINFMT_MISC is not set
CONFIG_IA32_EMULATION=y
CONFIG_IA32_AOUT=y
CONFIG_COMPAT=y
CONFIG_COMPAT_FOR_U64_ALIGNMENT=y
CONFIG_SYSVIPC_COMPAT=y
CONFIG_HAVE_TEXT_POKE_SMP=y
CONFIG_NET=y

#
# Networking options
#
CONFIG_PACKET=y
CONFIG_UNIX=y
CONFIG_XFRM=y
# CONFIG_XFRM_USER is not set
# CONFIG_XFRM_SUB_POLICY is not set
# CONFIG_XFRM_MIGRATE is not set
# CONFIG_XFRM_STATISTICS is not set
CONFIG_NET_KEY=y
# CONFIG_NET_KEY_MIGRATE is not set
CONFIG_INET=y
# CONFIG_IP_MULTICAST is not set
# CONFIG_IP_ADVANCED_ROUTER is not set
CONFIG_IP_ROUTE_CLASSID=y
# CONFIG_IP_PNP is not set
# CONFIG_NET_IPIP is not set
# CONFIG_NET_IPGRE_DEMUX is not set
# CONFIG_ARPD is not set
# CONFIG_SYN_COOKIES is not set
# CONFIG_INET_AH is not set
# CONFIG_INET_ESP is not set
# CONFIG_INET_IPCOMP is not set
# CONFIG_INET_XFRM_TUNNEL is not set
# CONFIG_INET_TUNNEL is not set
# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
# CONFIG_INET_XFRM_MODE_TUNNEL is not set
# CONFIG_INET_XFRM_MODE_BEET is not set
CONFIG_INET_LRO=y
CONFIG_INET_DIAG=y
CONFIG_INET_TCP_DIAG=y
# CONFIG_TCP_CONG_ADVANCED is not set
CONFIG_TCP_CONG_CUBIC=y
CONFIG_DEFAULT_TCP_CONG="cubic"
# CONFIG_TCP_MD5SIG is not set
# CONFIG_IPV6 is not set
# CONFIG_NETWORK_SECMARK is not set
# CONFIG_NETWORK_PHY_TIMESTAMPING is not set
# CONFIG_NETFILTER is not set
# CONFIG_IP_DCCP is not set
# CONFIG_IP_SCTP is not set
# CONFIG_RDS is not set
# CONFIG_TIPC is not set
# CONFIG_ATM is not set
# CONFIG_L2TP is not set
# CONFIG_BRIDGE is not set
# CONFIG_NET_DSA is not set
# CONFIG_VLAN_8021Q is not set
# CONFIG_DECNET is not set
# CONFIG_LLC2 is not set
# CONFIG_IPX is not set
# CONFIG_ATALK is not set
# CONFIG_X25 is not set
# CONFIG_LAPB is not set
# CONFIG_ECONET is not set
# CONFIG_WAN_ROUTER is not set
# CONFIG_PHONET is not set
# CONFIG_IEEE802154 is not set
CONFIG_NET_SCHED=y

#
# Queueing/Scheduling
#
CONFIG_NET_SCH_CBQ=m
CONFIG_NET_SCH_HTB=m
CONFIG_NET_SCH_HFSC=m
CONFIG_NET_SCH_PRIO=m
CONFIG_NET_SCH_MULTIQ=m
CONFIG_NET_SCH_RED=m
# CONFIG_NET_SCH_SFB is not set
CONFIG_NET_SCH_SFQ=m
CONFIG_NET_SCH_TEQL=m
CONFIG_NET_SCH_TBF=m
CONFIG_NET_SCH_GRED=m
CONFIG_NET_SCH_DSMARK=m
CONFIG_NET_SCH_NETEM=m
CONFIG_NET_SCH_DRR=m
# CONFIG_NET_SCH_MQPRIO is not set
# CONFIG_NET_SCH_CHOKE is not set
CONFIG_NET_SCH_QFQ=m
CONFIG_NET_SCH_INGRESS=m

#
# Classification
#
CONFIG_NET_CLS=y
CONFIG_NET_CLS_BASIC=m
CONFIG_NET_CLS_TCINDEX=m
CONFIG_NET_CLS_ROUTE4=m
CONFIG_NET_CLS_FW=m
CONFIG_NET_CLS_U32=m
# CONFIG_CLS_U32_PERF is not set
CONFIG_CLS_U32_MARK=y
# CONFIG_NET_CLS_RSVP is not set
# CONFIG_NET_CLS_RSVP6 is not set
CONFIG_NET_CLS_FLOW=m
# CONFIG_NET_CLS_CGROUP is not set
CONFIG_NET_EMATCH=y
CONFIG_NET_EMATCH_STACK=32
CONFIG_NET_EMATCH_CMP=m
CONFIG_NET_EMATCH_NBYTE=m
CONFIG_NET_EMATCH_U32=m
CONFIG_NET_EMATCH_META=m
CONFIG_NET_EMATCH_TEXT=m
CONFIG_NET_CLS_ACT=y
CONFIG_NET_ACT_POLICE=m
CONFIG_NET_ACT_GACT=m
CONFIG_GACT_PROB=y
CONFIG_NET_ACT_MIRRED=m
CONFIG_NET_ACT_NAT=m
CONFIG_NET_ACT_PEDIT=m
# CONFIG_NET_ACT_SIMP is not set
CONFIG_NET_ACT_SKBEDIT=m
CONFIG_NET_ACT_CSUM=m
CONFIG_NET_CLS_IND=y
CONFIG_NET_SCH_FIFO=y
# CONFIG_DCB is not set
# CONFIG_BATMAN_ADV is not set
CONFIG_RPS=y
CONFIG_RFS_ACCEL=y
CONFIG_XPS=y
CONFIG_HAVE_BPF_JIT=y
# CONFIG_BPF_JIT is not set

#
# Network testing
#
# CONFIG_NET_PKTGEN is not set
# CONFIG_HAMRADIO is not set
# CONFIG_CAN is not set
# CONFIG_IRDA is not set
# CONFIG_BT is not set
# CONFIG_AF_RXRPC is not set
# CONFIG_WIRELESS is not set
# CONFIG_WIMAX is not set
# CONFIG_RFKILL is not set
CONFIG_NET_9P=m
CONFIG_NET_9P_DEBUG=y
# CONFIG_CAIF is not set
# CONFIG_CEPH_LIB is not set

#
# Device Drivers
#

#
# Generic Driver Options
#
CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
# CONFIG_DEVTMPFS is not set
# CONFIG_STANDALONE is not set
CONFIG_PREVENT_FIRMWARE_BUILD=y
CONFIG_FW_LOADER=y
CONFIG_FIRMWARE_IN_KERNEL=y
CONFIG_EXTRA_FIRMWARE=""
# CONFIG_DEBUG_DRIVER is not set
# CONFIG_DEBUG_DEVRES is not set
# CONFIG_SYS_HYPERVISOR is not set
CONFIG_CONNECTOR=y
CONFIG_PROC_EVENTS=y
# CONFIG_MTD is not set
# CONFIG_PARPORT is not set
CONFIG_PNP=y
# CONFIG_PNP_DEBUG_MESSAGES is not set

#
# Protocols
#
CONFIG_PNPACPI=y
CONFIG_BLK_DEV=y
# CONFIG_BLK_DEV_FD is not set
# CONFIG_BLK_CPQ_DA is not set
# CONFIG_BLK_CPQ_CISS_DA is not set
# CONFIG_BLK_DEV_DAC960 is not set
# CONFIG_BLK_DEV_UMEM is not set
# CONFIG_BLK_DEV_COW_COMMON is not set
CONFIG_BLK_DEV_LOOP=y
# CONFIG_BLK_DEV_CRYPTOLOOP is not set
# CONFIG_BLK_DEV_DRBD is not set
# CONFIG_BLK_DEV_NBD is not set
# CONFIG_BLK_DEV_SX8 is not set
# CONFIG_BLK_DEV_UB is not set
# CONFIG_BLK_DEV_RAM is not set
# CONFIG_CDROM_PKTCDVD is not set
# CONFIG_ATA_OVER_ETH is not set
# CONFIG_BLK_DEV_HD is not set
# CONFIG_BLK_DEV_RBD is not set
# CONFIG_SENSORS_LIS3LV02D is not set
# CONFIG_MISC_DEVICES is not set
CONFIG_HAVE_IDE=y
# CONFIG_IDE is not set

#
# SCSI device support
#
CONFIG_SCSI_MOD=y
# CONFIG_RAID_ATTRS is not set
CONFIG_SCSI=y
CONFIG_SCSI_DMA=y
# CONFIG_SCSI_TGT is not set
# CONFIG_SCSI_NETLINK is not set
CONFIG_SCSI_PROC_FS=y

#
# SCSI support type (disk, tape, CD-ROM)
#
CONFIG_BLK_DEV_SD=y
# CONFIG_CHR_DEV_ST is not set
# CONFIG_CHR_DEV_OSST is not set
CONFIG_BLK_DEV_SR=y
CONFIG_BLK_DEV_SR_VENDOR=y
CONFIG_CHR_DEV_SG=y
# CONFIG_CHR_DEV_SCH is not set
CONFIG_SCSI_MULTI_LUN=y
CONFIG_SCSI_CONSTANTS=y
# CONFIG_SCSI_LOGGING is not set
# CONFIG_SCSI_SCAN_ASYNC is not set
CONFIG_SCSI_WAIT_SCAN=m

#
# SCSI Transports
#
# CONFIG_SCSI_SPI_ATTRS is not set
# CONFIG_SCSI_FC_ATTRS is not set
# CONFIG_SCSI_ISCSI_ATTRS is not set
# CONFIG_SCSI_SAS_ATTRS is not set
# CONFIG_SCSI_SAS_LIBSAS is not set
# CONFIG_SCSI_SRP_ATTRS is not set
# CONFIG_SCSI_LOWLEVEL is not set
# CONFIG_SCSI_DH is not set
# CONFIG_SCSI_OSD_INITIATOR is not set
CONFIG_ATA=y
# CONFIG_ATA_NONSTANDARD is not set
CONFIG_ATA_VERBOSE_ERROR=y
CONFIG_ATA_ACPI=y
# CONFIG_SATA_PMP is not set

#
# Controllers with non-SFF native interface
#
CONFIG_SATA_AHCI=y
CONFIG_SATA_AHCI_PLATFORM=y
# CONFIG_SATA_INIC162X is not set
# CONFIG_SATA_ACARD_AHCI is not set
# CONFIG_SATA_SIL24 is not set
CONFIG_ATA_SFF=y

#
# SFF controllers with custom DMA interface
#
# CONFIG_PDC_ADMA is not set
# CONFIG_SATA_QSTOR is not set
# CONFIG_SATA_SX4 is not set
CONFIG_ATA_BMDMA=y

#
# SATA SFF controllers with BMDMA
#
CONFIG_ATA_PIIX=y
# CONFIG_SATA_MV is not set
# CONFIG_SATA_NV is not set
# CONFIG_SATA_PROMISE is not set
# CONFIG_SATA_SIL is not set
# CONFIG_SATA_SIS is not set
# CONFIG_SATA_SVW is not set
# CONFIG_SATA_ULI is not set
# CONFIG_SATA_VIA is not set
# CONFIG_SATA_VITESSE is not set

#
# PATA SFF controllers with BMDMA
#
# CONFIG_PATA_ALI is not set
# CONFIG_PATA_AMD is not set
# CONFIG_PATA_ARASAN_CF is not set
# CONFIG_PATA_ARTOP is not set
# CONFIG_PATA_ATIIXP is not set
# CONFIG_PATA_ATP867X is not set
# CONFIG_PATA_CMD64X is not set
# CONFIG_PATA_CS5520 is not set
# CONFIG_PATA_CS5530 is not set
# CONFIG_PATA_CS5536 is not set
# CONFIG_PATA_CYPRESS is not set
# CONFIG_PATA_EFAR is not set
# CONFIG_PATA_HPT366 is not set
# CONFIG_PATA_HPT37X is not set
# CONFIG_PATA_HPT3X2N is not set
# CONFIG_PATA_HPT3X3 is not set
# CONFIG_PATA_IT8213 is not set
# CONFIG_PATA_IT821X is not set
# CONFIG_PATA_JMICRON is not set
# CONFIG_PATA_MARVELL is not set
# CONFIG_PATA_NETCELL is not set
# CONFIG_PATA_NINJA32 is not set
# CONFIG_PATA_NS87415 is not set
CONFIG_PATA_OLDPIIX=y
# CONFIG_PATA_OPTIDMA is not set
# CONFIG_PATA_PDC2027X is not set
# CONFIG_PATA_PDC_OLD is not set
# CONFIG_PATA_RADISYS is not set
# CONFIG_PATA_RDC is not set
# CONFIG_PATA_SC1200 is not set
CONFIG_PATA_SCH=y
# CONFIG_PATA_SERVERWORKS is not set
# CONFIG_PATA_SIL680 is not set
# CONFIG_PATA_SIS is not set
# CONFIG_PATA_TOSHIBA is not set
# CONFIG_PATA_TRIFLEX is not set
# CONFIG_PATA_VIA is not set
# CONFIG_PATA_WINBOND is not set

#
# PIO-only SFF controllers
#
# CONFIG_PATA_CMD640_PCI is not set
CONFIG_PATA_MPIIX=y
# CONFIG_PATA_NS87410 is not set
# CONFIG_PATA_OPTI is not set
# CONFIG_PATA_RZ1000 is not set

#
# Generic fallback / legacy drivers
#
# CONFIG_PATA_ACPI is not set
# CONFIG_ATA_GENERIC is not set
# CONFIG_PATA_LEGACY is not set
CONFIG_MD=y
# CONFIG_BLK_DEV_MD is not set
CONFIG_BLK_DEV_DM=y
# CONFIG_DM_DEBUG is not set
CONFIG_DM_CRYPT=m
# CONFIG_DM_SNAPSHOT is not set
# CONFIG_DM_MIRROR is not set
# CONFIG_DM_RAID is not set
# CONFIG_DM_ZERO is not set
# CONFIG_DM_MULTIPATH is not set
# CONFIG_DM_DELAY is not set
CONFIG_DM_UEVENT=y
# CONFIG_DM_FLAKEY is not set
# CONFIG_TARGET_CORE is not set
# CONFIG_FUSION is not set

#
# IEEE 1394 (FireWire) support
#
# CONFIG_FIREWIRE is not set
# CONFIG_FIREWIRE_NOSY is not set
# CONFIG_I2O is not set
# CONFIG_MACINTOSH_DRIVERS is not set
CONFIG_NETDEVICES=y
# CONFIG_IFB is not set
# CONFIG_DUMMY is not set
CONFIG_BONDING=m
# CONFIG_MACVLAN is not set
# CONFIG_EQUALIZER is not set
CONFIG_TUN=m
CONFIG_VETH=m
# CONFIG_NET_SB1000 is not set
# CONFIG_ARCNET is not set
CONFIG_MII=m
CONFIG_PHYLIB=m

#
# MII PHY device drivers
#
# CONFIG_MARVELL_PHY is not set
# CONFIG_DAVICOM_PHY is not set
# CONFIG_QSEMI_PHY is not set
# CONFIG_LXT_PHY is not set
# CONFIG_CICADA_PHY is not set
# CONFIG_VITESSE_PHY is not set
# CONFIG_SMSC_PHY is not set
# CONFIG_BROADCOM_PHY is not set
CONFIG_BCM63XX_PHY=m
# CONFIG_ICPLUS_PHY is not set
# CONFIG_REALTEK_PHY is not set
# CONFIG_NATIONAL_PHY is not set
# CONFIG_STE10XP is not set
# CONFIG_LSI_ET1011C_PHY is not set
# CONFIG_MICREL_PHY is not set
# CONFIG_MDIO_BITBANG is not set
# CONFIG_NET_ETHERNET is not set
CONFIG_NETDEV_1000=y
# CONFIG_ACENIC is not set
# CONFIG_DL2K is not set
# CONFIG_E1000 is not set
# CONFIG_E1000E is not set
# CONFIG_IP1000 is not set
# CONFIG_IGB is not set
# CONFIG_IGBVF is not set
# CONFIG_NS83820 is not set
# CONFIG_HAMACHI is not set
# CONFIG_YELLOWFIN is not set
# CONFIG_R8169 is not set
# CONFIG_SIS190 is not set
# CONFIG_SKGE is not set
# CONFIG_SKY2 is not set
# CONFIG_VIA_VELOCITY is not set
CONFIG_TIGON3=m
CONFIG_BNX2=y
CONFIG_CNIC=y
# CONFIG_QLA3XXX is not set
# CONFIG_ATL1 is not set
# CONFIG_ATL1E is not set
# CONFIG_ATL1C is not set
# CONFIG_JME is not set
# CONFIG_STMMAC_ETH is not set
# CONFIG_PCH_GBE is not set
# CONFIG_NETDEV_10000 is not set
# CONFIG_TR is not set
# CONFIG_WLAN is not set

#
# Enable WiMAX (Networking options) to see the WiMAX drivers
#

#
# USB Network Adapters
#
# CONFIG_USB_CATC is not set
# CONFIG_USB_KAWETH is not set
# CONFIG_USB_PEGASUS is not set
# CONFIG_USB_RTL8150 is not set
CONFIG_USB_USBNET=m
CONFIG_USB_NET_AX8817X=m
CONFIG_USB_NET_CDCETHER=m
CONFIG_USB_NET_CDC_EEM=m
CONFIG_USB_NET_CDC_NCM=m
CONFIG_USB_NET_DM9601=m
CONFIG_USB_NET_SMSC75XX=m
CONFIG_USB_NET_SMSC95XX=m
CONFIG_USB_NET_GL620A=m
CONFIG_USB_NET_NET1080=m
CONFIG_USB_NET_PLUSB=m
CONFIG_USB_NET_MCS7830=m
CONFIG_USB_NET_RNDIS_HOST=m
CONFIG_USB_NET_CDC_SUBSET=m
CONFIG_USB_ALI_M5632=y
CONFIG_USB_AN2720=y
CONFIG_USB_BELKIN=y
# CONFIG_USB_ARMLINUX is not set
CONFIG_USB_EPSON2888=y
CONFIG_USB_KC2190=y
CONFIG_USB_NET_ZAURUS=m
# CONFIG_USB_NET_CX82310_ETH is not set
CONFIG_USB_NET_INT51X1=m
CONFIG_USB_IPHETH=m
CONFIG_USB_SIERRA_NET=m
# CONFIG_USB_VL600 is not set
# CONFIG_WAN is not set

#
# CAIF transport drivers
#
# CONFIG_FDDI is not set
# CONFIG_HIPPI is not set
CONFIG_PPP=m
# CONFIG_PPP_MULTILINK is not set
# CONFIG_PPP_FILTER is not set
CONFIG_PPP_ASYNC=m
CONFIG_PPP_SYNC_TTY=m
CONFIG_PPP_DEFLATE=m
CONFIG_PPP_BSDCOMP=m
# CONFIG_PPP_MPPE is not set
CONFIG_PPPOE=m
# CONFIG_SLIP is not set
CONFIG_SLHC=m
# CONFIG_NET_FC is not set
# CONFIG_NETCONSOLE is not set
# CONFIG_NETPOLL is not set
# CONFIG_NET_POLL_CONTROLLER is not set
# CONFIG_VMXNET3 is not set
# CONFIG_ISDN is not set
# CONFIG_PHONE is not set

#
# Input device support
#
CONFIG_INPUT=y
# CONFIG_INPUT_FF_MEMLESS is not set
CONFIG_INPUT_POLLDEV=y
CONFIG_INPUT_SPARSEKMAP=y

#
# Userland interfaces
#
CONFIG_INPUT_MOUSEDEV=y
CONFIG_INPUT_MOUSEDEV_PSAUX=y
CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024
CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768
# CONFIG_INPUT_JOYDEV is not set
CONFIG_INPUT_EVDEV=y
# CONFIG_INPUT_EVBUG is not set

#
# Input Device Drivers
#
CONFIG_INPUT_KEYBOARD=y
# CONFIG_KEYBOARD_ADP5588 is not set
# CONFIG_KEYBOARD_ADP5589 is not set
CONFIG_KEYBOARD_ATKBD=y
# CONFIG_KEYBOARD_QT1070 is not set
# CONFIG_KEYBOARD_QT2160 is not set
# CONFIG_KEYBOARD_LKKBD is not set
# CONFIG_KEYBOARD_TCA6416 is not set
# CONFIG_KEYBOARD_LM8323 is not set
# CONFIG_KEYBOARD_MAX7359 is not set
# CONFIG_KEYBOARD_MCS is not set
# CONFIG_KEYBOARD_MPR121 is not set
# CONFIG_KEYBOARD_NEWTON is not set
# CONFIG_KEYBOARD_OPENCORES is not set
# CONFIG_KEYBOARD_STOWAWAY is not set
# CONFIG_KEYBOARD_SUNKBD is not set
# CONFIG_KEYBOARD_XTKBD is not set
CONFIG_INPUT_MOUSE=y
CONFIG_MOUSE_PS2=y
CONFIG_MOUSE_PS2_ALPS=y
CONFIG_MOUSE_PS2_LOGIPS2PP=y
CONFIG_MOUSE_PS2_SYNAPTICS=y
CONFIG_MOUSE_PS2_LIFEBOOK=y
CONFIG_MOUSE_PS2_TRACKPOINT=y
# CONFIG_MOUSE_PS2_ELANTECH is not set
# CONFIG_MOUSE_PS2_SENTELIC is not set
# CONFIG_MOUSE_PS2_TOUCHKIT is not set
# CONFIG_MOUSE_SERIAL is not set
# CONFIG_MOUSE_APPLETOUCH is not set
# CONFIG_MOUSE_BCM5974 is not set
# CONFIG_MOUSE_VSXXXAA is not set
# CONFIG_MOUSE_SYNAPTICS_I2C is not set
CONFIG_INPUT_JOYSTICK=y
CONFIG_JOYSTICK_ANALOG=m
# CONFIG_JOYSTICK_A3D is not set
# CONFIG_JOYSTICK_ADI is not set
# CONFIG_JOYSTICK_COBRA is not set
# CONFIG_JOYSTICK_GF2K is not set
# CONFIG_JOYSTICK_GRIP is not set
# CONFIG_JOYSTICK_GRIP_MP is not set
# CONFIG_JOYSTICK_GUILLEMOT is not set
# CONFIG_JOYSTICK_INTERACT is not set
# CONFIG_JOYSTICK_SIDEWINDER is not set
# CONFIG_JOYSTICK_TMDC is not set
# CONFIG_JOYSTICK_IFORCE is not set
# CONFIG_JOYSTICK_WARRIOR is not set
# CONFIG_JOYSTICK_MAGELLAN is not set
# CONFIG_JOYSTICK_SPACEORB is not set
# CONFIG_JOYSTICK_SPACEBALL is not set
# CONFIG_JOYSTICK_STINGER is not set
# CONFIG_JOYSTICK_TWIDJOY is not set
# CONFIG_JOYSTICK_ZHENHUA is not set
# CONFIG_JOYSTICK_AS5011 is not set
# CONFIG_JOYSTICK_JOYDUMP is not set
# CONFIG_JOYSTICK_XPAD is not set
# CONFIG_INPUT_TABLET is not set
# CONFIG_INPUT_TOUCHSCREEN is not set
CONFIG_INPUT_MISC=y
# CONFIG_INPUT_AD714X is not set
# CONFIG_INPUT_PCSPKR is not set
# CONFIG_INPUT_APANEL is not set
# CONFIG_INPUT_ATLAS_BTNS is not set
# CONFIG_INPUT_ATI_REMOTE is not set
# CONFIG_INPUT_ATI_REMOTE2 is not set
# CONFIG_INPUT_KEYSPAN_REMOTE is not set
# CONFIG_INPUT_POWERMATE is not set
# CONFIG_INPUT_YEALINK is not set
# CONFIG_INPUT_CM109 is not set
CONFIG_INPUT_UINPUT=y
# CONFIG_INPUT_PCF8574 is not set
# CONFIG_INPUT_ADXL34X is not set
# CONFIG_INPUT_CMA3000 is not set

#
# Hardware I/O ports
#
CONFIG_SERIO=y
CONFIG_SERIO_I8042=y
CONFIG_SERIO_SERPORT=y
# CONFIG_SERIO_CT82C710 is not set
# CONFIG_SERIO_PCIPS2 is not set
CONFIG_SERIO_LIBPS2=y
# CONFIG_SERIO_RAW is not set
# CONFIG_SERIO_ALTERA_PS2 is not set
# CONFIG_SERIO_PS2MULT is not set
CONFIG_GAMEPORT=m
# CONFIG_GAMEPORT_NS558 is not set
# CONFIG_GAMEPORT_L4 is not set
# CONFIG_GAMEPORT_EMU10K1 is not set
# CONFIG_GAMEPORT_FM801 is not set

#
# Character devices
#
CONFIG_VT=y
CONFIG_CONSOLE_TRANSLATIONS=y
CONFIG_VT_CONSOLE=y
CONFIG_HW_CONSOLE=y
# CONFIG_VT_HW_CONSOLE_BINDING is not set
CONFIG_UNIX98_PTYS=y
# CONFIG_DEVPTS_MULTIPLE_INSTANCES is not set
# CONFIG_LEGACY_PTYS is not set
# CONFIG_SERIAL_NONSTANDARD is not set
# CONFIG_NOZOMI is not set
# CONFIG_N_GSM is not set
# CONFIG_TRACE_SINK is not set
CONFIG_DEVKMEM=y

#
# Serial drivers
#
CONFIG_SERIAL_8250=m
CONFIG_FIX_EARLYCON_MEM=y
CONFIG_SERIAL_8250_PCI=m
CONFIG_SERIAL_8250_PNP=m
CONFIG_SERIAL_8250_NR_UARTS=32
CONFIG_SERIAL_8250_RUNTIME_UARTS=4
# CONFIG_SERIAL_8250_EXTENDED is not set

#
# Non-8250 serial port support
#
# CONFIG_SERIAL_MFD_HSU is not set
CONFIG_SERIAL_CORE=m
# CONFIG_SERIAL_JSM is not set
# CONFIG_SERIAL_TIMBERDALE is not set
# CONFIG_SERIAL_ALTERA_JTAGUART is not set
# CONFIG_SERIAL_ALTERA_UART is not set
# CONFIG_SERIAL_PCH_UART is not set
# CONFIG_SERIAL_XILINX_PS_UART is not set
# CONFIG_IPMI_HANDLER is not set
# CONFIG_HW_RANDOM is not set
CONFIG_NVRAM=y
# CONFIG_R3964 is not set
# CONFIG_APPLICOM is not set
# CONFIG_MWAVE is not set
# CONFIG_RAW_DRIVER is not set
CONFIG_HPET=y
# CONFIG_HPET_MMAP is not set
# CONFIG_HANGCHECK_TIMER is not set
# CONFIG_TCG_TPM is not set
# CONFIG_TELCLOCK is not set
CONFIG_DEVPORT=y
CONFIG_RAMOOPS=y
CONFIG_I2C=y
CONFIG_I2C_BOARDINFO=y
# CONFIG_I2C_COMPAT is not set
# CONFIG_I2C_CHARDEV is not set
# CONFIG_I2C_MUX is not set
CONFIG_I2C_HELPER_AUTO=y
CONFIG_I2C_ALGOBIT=y

#
# I2C Hardware Bus support
#

#
# PC SMBus host controller drivers
#
# CONFIG_I2C_ALI1535 is not set
# CONFIG_I2C_ALI1563 is not set
# CONFIG_I2C_ALI15X3 is not set
# CONFIG_I2C_AMD756 is not set
# CONFIG_I2C_AMD8111 is not set
CONFIG_I2C_I801=y
# CONFIG_I2C_ISCH is not set
# CONFIG_I2C_PIIX4 is not set
# CONFIG_I2C_NFORCE2 is not set
# CONFIG_I2C_SIS5595 is not set
# CONFIG_I2C_SIS630 is not set
# CONFIG_I2C_SIS96X is not set
# CONFIG_I2C_VIA is not set
# CONFIG_I2C_VIAPRO is not set

#
# ACPI drivers
#
CONFIG_I2C_SCMI=y

#
# I2C system bus drivers (mostly embedded / system-on-chip)
#
CONFIG_I2C_INTEL_MID=y
# CONFIG_I2C_OCORES is not set
# CONFIG_I2C_PCA_PLATFORM is not set
# CONFIG_I2C_PXA_PCI is not set
# CONFIG_I2C_SIMTEC is not set
# CONFIG_I2C_XILINX is not set
# CONFIG_I2C_EG20T is not set

#
# External I2C/SMBus adapter drivers
#
# CONFIG_I2C_DIOLAN_U2C is not set
# CONFIG_I2C_PARPORT_LIGHT is not set
# CONFIG_I2C_TAOS_EVM is not set
# CONFIG_I2C_TINY_USB is not set

#
# Other I2C/SMBus bus drivers
#
# CONFIG_I2C_STUB is not set
# CONFIG_I2C_DEBUG_CORE is not set
# CONFIG_I2C_DEBUG_ALGO is not set
# CONFIG_I2C_DEBUG_BUS is not set
# CONFIG_SPI is not set

#
# PPS support
#
# CONFIG_PPS is not set

#
# PPS generators support
#

#
# PTP clock support
#

#
# Enable Device Drivers -> PPS to see the PTP clock options.
#
CONFIG_ARCH_WANT_OPTIONAL_GPIOLIB=y
# CONFIG_GPIOLIB is not set
# CONFIG_W1 is not set
CONFIG_POWER_SUPPLY=y
# CONFIG_POWER_SUPPLY_DEBUG is not set
# CONFIG_PDA_POWER is not set
# CONFIG_TEST_POWER is not set
# CONFIG_BATTERY_DS2780 is not set
# CONFIG_BATTERY_DS2782 is not set
# CONFIG_BATTERY_BQ20Z75 is not set
# CONFIG_BATTERY_BQ27x00 is not set
# CONFIG_BATTERY_MAX17040 is not set
# CONFIG_BATTERY_MAX17042 is not set
# CONFIG_CHARGER_MAX8903 is not set
CONFIG_HWMON=y
CONFIG_HWMON_VID=y
# CONFIG_HWMON_DEBUG_CHIP is not set

#
# Native drivers
#
# CONFIG_SENSORS_ABITUGURU is not set
# CONFIG_SENSORS_ABITUGURU3 is not set
CONFIG_SENSORS_AD7414=y
CONFIG_SENSORS_AD7418=y
CONFIG_SENSORS_ADM1021=y
CONFIG_SENSORS_ADM1025=y
CONFIG_SENSORS_ADM1026=y
CONFIG_SENSORS_ADM1029=y
CONFIG_SENSORS_ADM1031=y
CONFIG_SENSORS_ADM9240=y
CONFIG_SENSORS_ADT7411=y
CONFIG_SENSORS_ADT7462=y
CONFIG_SENSORS_ADT7470=y
CONFIG_SENSORS_ADT7475=y
CONFIG_SENSORS_ASC7621=y
CONFIG_SENSORS_K8TEMP=y
CONFIG_SENSORS_K10TEMP=y
# CONFIG_SENSORS_FAM15H_POWER is not set
CONFIG_SENSORS_ASB100=y
CONFIG_SENSORS_ATXP1=y
# CONFIG_SENSORS_DS620 is not set
CONFIG_SENSORS_DS1621=y
CONFIG_SENSORS_I5K_AMB=y
CONFIG_SENSORS_F71805F=y
CONFIG_SENSORS_F71882FG=y
CONFIG_SENSORS_F75375S=y
CONFIG_SENSORS_FSCHMD=y
CONFIG_SENSORS_G760A=y
CONFIG_SENSORS_GL518SM=y
CONFIG_SENSORS_GL520SM=y
CONFIG_SENSORS_CORETEMP=y
CONFIG_SENSORS_IT87=y
CONFIG_SENSORS_JC42=y
CONFIG_SENSORS_LINEAGE=m
CONFIG_SENSORS_LM63=y
CONFIG_SENSORS_LM73=y
CONFIG_SENSORS_LM75=y
CONFIG_SENSORS_LM77=y
CONFIG_SENSORS_LM78=y
CONFIG_SENSORS_LM80=y
CONFIG_SENSORS_LM83=y
CONFIG_SENSORS_LM85=y
CONFIG_SENSORS_LM87=y
CONFIG_SENSORS_LM90=y
CONFIG_SENSORS_LM92=y
CONFIG_SENSORS_LM93=y
CONFIG_SENSORS_LTC4151=m
CONFIG_SENSORS_LTC4215=y
CONFIG_SENSORS_LTC4245=y
CONFIG_SENSORS_LTC4261=y
CONFIG_SENSORS_LM95241=y
CONFIG_SENSORS_MAX16065=y
CONFIG_SENSORS_MAX1619=y
CONFIG_SENSORS_MAX6639=m
CONFIG_SENSORS_MAX6642=y
CONFIG_SENSORS_MAX6650=y
CONFIG_SENSORS_PC87360=y
CONFIG_SENSORS_PC87427=y
CONFIG_SENSORS_PCF8591=y
CONFIG_PMBUS=m
CONFIG_SENSORS_PMBUS=m
CONFIG_SENSORS_ADM1275=m
# CONFIG_SENSORS_MAX16064 is not set
CONFIG_SENSORS_MAX34440=m
CONFIG_SENSORS_MAX8688=m
CONFIG_SENSORS_UCD9000=m
CONFIG_SENSORS_UCD9200=m
# CONFIG_SENSORS_SHT21 is not set
CONFIG_SENSORS_SIS5595=y
CONFIG_SENSORS_SMM665=y
CONFIG_SENSORS_DME1737=y
CONFIG_SENSORS_EMC1403=y
CONFIG_SENSORS_EMC2103=y
CONFIG_SENSORS_EMC6W201=m
CONFIG_SENSORS_SMSC47M1=y
CONFIG_SENSORS_SMSC47M192=y
CONFIG_SENSORS_SMSC47B397=y
CONFIG_SENSORS_SCH5627=m
CONFIG_SENSORS_ADS1015=m
CONFIG_SENSORS_ADS7828=y
CONFIG_SENSORS_AMC6821=y
CONFIG_SENSORS_THMC50=y
CONFIG_SENSORS_TMP102=y
CONFIG_SENSORS_TMP401=y
CONFIG_SENSORS_TMP421=y
CONFIG_SENSORS_VIA_CPUTEMP=y
CONFIG_SENSORS_VIA686A=y
CONFIG_SENSORS_VT1211=y
CONFIG_SENSORS_VT8231=y
CONFIG_SENSORS_W83781D=y
CONFIG_SENSORS_W83791D=y
CONFIG_SENSORS_W83792D=y
CONFIG_SENSORS_W83793=y
CONFIG_SENSORS_W83795=y
# CONFIG_SENSORS_W83795_FANCTRL is not set
CONFIG_SENSORS_W83L785TS=y
CONFIG_SENSORS_W83L786NG=y
CONFIG_SENSORS_W83627HF=y
CONFIG_SENSORS_W83627EHF=y
# CONFIG_SENSORS_APPLESMC is not set

#
# ACPI drivers
#
CONFIG_SENSORS_ACPI_POWER=m
# CONFIG_SENSORS_ATK0110 is not set
CONFIG_THERMAL=y
CONFIG_THERMAL_HWMON=y
# CONFIG_WATCHDOG is not set
CONFIG_SSB_POSSIBLE=y

#
# Sonics Silicon Backplane
#
# CONFIG_SSB is not set
CONFIG_BCMA_POSSIBLE=y

#
# Broadcom specific AMBA
#
# CONFIG_BCMA is not set
# CONFIG_MFD_SUPPORT is not set
# CONFIG_REGULATOR is not set
# CONFIG_MEDIA_SUPPORT is not set

#
# Graphics support
#
CONFIG_AGP=y
# CONFIG_AGP_AMD64 is not set
CONFIG_AGP_INTEL=y
# CONFIG_AGP_SIS is not set
# CONFIG_AGP_VIA is not set
CONFIG_VGA_ARB=y
CONFIG_VGA_ARB_MAX_GPUS=16
# CONFIG_VGA_SWITCHEROO is not set
CONFIG_DRM=y
CONFIG_DRM_KMS_HELPER=y
CONFIG_DRM_TTM=y
# CONFIG_DRM_TDFX is not set
# CONFIG_DRM_R128 is not set
CONFIG_DRM_RADEON=y
CONFIG_DRM_RADEON_KMS=y
# CONFIG_DRM_I915 is not set
# CONFIG_DRM_MGA is not set
# CONFIG_DRM_SIS is not set
# CONFIG_DRM_VIA is not set
# CONFIG_DRM_SAVAGE is not set
# CONFIG_STUB_POULSBO is not set
# CONFIG_VGASTATE is not set
CONFIG_VIDEO_OUTPUT_CONTROL=y
CONFIG_FB=y
# CONFIG_FIRMWARE_EDID is not set
# CONFIG_FB_DDC is not set
# CONFIG_FB_BOOT_VESA_SUPPORT is not set
CONFIG_FB_CFB_FILLRECT=y
CONFIG_FB_CFB_COPYAREA=y
CONFIG_FB_CFB_IMAGEBLIT=y
# CONFIG_FB_CFB_REV_PIXELS_IN_BYTE is not set
# CONFIG_FB_SYS_FILLRECT is not set
# CONFIG_FB_SYS_COPYAREA is not set
# CONFIG_FB_SYS_IMAGEBLIT is not set
# CONFIG_FB_FOREIGN_ENDIAN is not set
# CONFIG_FB_SYS_FOPS is not set
# CONFIG_FB_WMT_GE_ROPS is not set
# CONFIG_FB_SVGALIB is not set
# CONFIG_FB_MACMODES is not set
# CONFIG_FB_BACKLIGHT is not set
# CONFIG_FB_MODE_HELPERS is not set
# CONFIG_FB_TILEBLITTING is not set

#
# Frame buffer hardware drivers
#
# CONFIG_FB_CIRRUS is not set
# CONFIG_FB_PM2 is not set
# CONFIG_FB_CYBER2000 is not set
# CONFIG_FB_ARC is not set
# CONFIG_FB_ASILIANT is not set
# CONFIG_FB_IMSTT is not set
# CONFIG_FB_VGA16 is not set
# CONFIG_FB_UVESA is not set
# CONFIG_FB_VESA is not set
# CONFIG_FB_N411 is not set
# CONFIG_FB_HGA is not set
# CONFIG_FB_S1D13XXX is not set
# CONFIG_FB_NVIDIA is not set
# CONFIG_FB_RIVA is not set
# CONFIG_FB_LE80578 is not set
# CONFIG_FB_MATROX is not set
# CONFIG_FB_RADEON is not set
# CONFIG_FB_ATY128 is not set
# CONFIG_FB_ATY is not set
# CONFIG_FB_S3 is not set
# CONFIG_FB_SAVAGE is not set
# CONFIG_FB_SIS is not set
# CONFIG_FB_VIA is not set
# CONFIG_FB_NEOMAGIC is not set
# CONFIG_FB_KYRO is not set
# CONFIG_FB_3DFX is not set
# CONFIG_FB_VOODOO1 is not set
# CONFIG_FB_VT8623 is not set
# CONFIG_FB_TRIDENT is not set
# CONFIG_FB_ARK is not set
# CONFIG_FB_PM3 is not set
# CONFIG_FB_CARMINE is not set
# CONFIG_FB_GEODE is not set
# CONFIG_FB_UDL is not set
# CONFIG_FB_VIRTUAL is not set
# CONFIG_FB_METRONOME is not set
# CONFIG_FB_MB862XX is not set
# CONFIG_FB_BROADSHEET is not set
# CONFIG_BACKLIGHT_LCD_SUPPORT is not set
CONFIG_BACKLIGHT_CLASS_DEVICE=y

#
# Display device support
#
CONFIG_DISPLAY_SUPPORT=y

#
# Display hardware drivers
#

#
# Console display driver support
#
CONFIG_VGA_CONSOLE=y
CONFIG_VGACON_SOFT_SCROLLBACK=y
CONFIG_VGACON_SOFT_SCROLLBACK_SIZE=256
CONFIG_DUMMY_CONSOLE=y
CONFIG_FRAMEBUFFER_CONSOLE=y
CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y
# CONFIG_FRAMEBUFFER_CONSOLE_ROTATION is not set
# CONFIG_FONTS is not set
CONFIG_FONT_8x8=y
CONFIG_FONT_8x16=y
# CONFIG_LOGO is not set
CONFIG_SOUND=m
CONFIG_SOUND_OSS_CORE=y
CONFIG_SOUND_OSS_CORE_PRECLAIM=y
CONFIG_SND=m
CONFIG_SND_TIMER=m
CONFIG_SND_PCM=m
CONFIG_SND_SEQUENCER=m
CONFIG_SND_SEQ_DUMMY=m
CONFIG_SND_OSSEMUL=y
CONFIG_SND_MIXER_OSS=m
CONFIG_SND_PCM_OSS=m
CONFIG_SND_PCM_OSS_PLUGINS=y
CONFIG_SND_SEQUENCER_OSS=y
CONFIG_SND_HRTIMER=m
CONFIG_SND_SEQ_HRTIMER_DEFAULT=y
CONFIG_SND_DYNAMIC_MINORS=y
CONFIG_SND_SUPPORT_OLD_API=y
# CONFIG_SND_VERBOSE_PROCFS is not set
# CONFIG_SND_VERBOSE_PRINTK is not set
# CONFIG_SND_DEBUG is not set
CONFIG_SND_VMASTER=y
CONFIG_SND_DMA_SGBUF=y
# CONFIG_SND_RAWMIDI_SEQ is not set
# CONFIG_SND_OPL3_LIB_SEQ is not set
# CONFIG_SND_OPL4_LIB_SEQ is not set
# CONFIG_SND_SBAWE_SEQ is not set
# CONFIG_SND_EMU10K1_SEQ is not set
CONFIG_SND_AC97_CODEC=m
CONFIG_SND_DRIVERS=y
# CONFIG_SND_PCSP is not set
# CONFIG_SND_DUMMY is not set
# CONFIG_SND_ALOOP is not set
# CONFIG_SND_VIRMIDI is not set
# CONFIG_SND_MTPAV is not set
# CONFIG_SND_SERIAL_U16550 is not set
# CONFIG_SND_MPU401 is not set
CONFIG_SND_AC97_POWER_SAVE=y
CONFIG_SND_AC97_POWER_SAVE_DEFAULT=16
CONFIG_SND_PCI=y
# CONFIG_SND_AD1889 is not set
# CONFIG_SND_ALS300 is not set
# CONFIG_SND_ALS4000 is not set
# CONFIG_SND_ALI5451 is not set
# CONFIG_SND_ASIHPI is not set
# CONFIG_SND_ATIIXP is not set
# CONFIG_SND_ATIIXP_MODEM is not set
# CONFIG_SND_AU8810 is not set
# CONFIG_SND_AU8820 is not set
# CONFIG_SND_AU8830 is not set
# CONFIG_SND_AW2 is not set
# CONFIG_SND_AZT3328 is not set
# CONFIG_SND_BT87X is not set
# CONFIG_SND_CA0106 is not set
# CONFIG_SND_CMIPCI is not set
# CONFIG_SND_OXYGEN is not set
# CONFIG_SND_CS4281 is not set
# CONFIG_SND_CS46XX is not set
# CONFIG_SND_CS5530 is not set
# CONFIG_SND_CS5535AUDIO is not set
# CONFIG_SND_CTXFI is not set
# CONFIG_SND_DARLA20 is not set
# CONFIG_SND_GINA20 is not set
# CONFIG_SND_LAYLA20 is not set
# CONFIG_SND_DARLA24 is not set
# CONFIG_SND_GINA24 is not set
# CONFIG_SND_LAYLA24 is not set
# CONFIG_SND_MONA is not set
# CONFIG_SND_MIA is not set
# CONFIG_SND_ECHO3G is not set
# CONFIG_SND_INDIGO is not set
# CONFIG_SND_INDIGOIO is not set
# CONFIG_SND_INDIGODJ is not set
# CONFIG_SND_INDIGOIOX is not set
# CONFIG_SND_INDIGODJX is not set
# CONFIG_SND_EMU10K1 is not set
# CONFIG_SND_EMU10K1X is not set
# CONFIG_SND_ENS1370 is not set
# CONFIG_SND_ENS1371 is not set
# CONFIG_SND_ES1938 is not set
# CONFIG_SND_ES1968 is not set
# CONFIG_SND_FM801 is not set
CONFIG_SND_HDA_INTEL=m
# CONFIG_SND_HDA_HWDEP is not set
# CONFIG_SND_HDA_INPUT_BEEP is not set
# CONFIG_SND_HDA_INPUT_JACK is not set
# CONFIG_SND_HDA_PATCH_LOADER is not set
CONFIG_SND_HDA_CODEC_REALTEK=y
CONFIG_SND_HDA_CODEC_ANALOG=y
CONFIG_SND_HDA_CODEC_SIGMATEL=y
CONFIG_SND_HDA_CODEC_VIA=y
CONFIG_SND_HDA_CODEC_HDMI=y
CONFIG_SND_HDA_CODEC_CIRRUS=y
CONFIG_SND_HDA_CODEC_CONEXANT=y
CONFIG_SND_HDA_CODEC_CA0110=y
CONFIG_SND_HDA_CODEC_CMEDIA=y
CONFIG_SND_HDA_CODEC_SI3054=y
CONFIG_SND_HDA_GENERIC=y
# CONFIG_SND_HDA_POWER_SAVE is not set
# CONFIG_SND_HDSP is not set
# CONFIG_SND_HDSPM is not set
# CONFIG_SND_ICE1712 is not set
# CONFIG_SND_ICE1724 is not set
CONFIG_SND_INTEL8X0=m
# CONFIG_SND_INTEL8X0M is not set
# CONFIG_SND_KORG1212 is not set
# CONFIG_SND_LOLA is not set
# CONFIG_SND_LX6464ES is not set
# CONFIG_SND_MAESTRO3 is not set
# CONFIG_SND_MIXART is not set
# CONFIG_SND_NM256 is not set
# CONFIG_SND_PCXHR is not set
# CONFIG_SND_RIPTIDE is not set
# CONFIG_SND_RME32 is not set
# CONFIG_SND_RME96 is not set
# CONFIG_SND_RME9652 is not set
# CONFIG_SND_SONICVIBES is not set
# CONFIG_SND_TRIDENT is not set
# CONFIG_SND_VIA82XX is not set
# CONFIG_SND_VIA82XX_MODEM is not set
# CONFIG_SND_VIRTUOSO is not set
# CONFIG_SND_VX222 is not set
# CONFIG_SND_YMFPCI is not set
# CONFIG_SND_USB is not set
# CONFIG_SND_SOC is not set
# CONFIG_SOUND_PRIME is not set
CONFIG_AC97_BUS=m
CONFIG_HID_SUPPORT=y
CONFIG_HID=y
CONFIG_HIDRAW=y

#
# USB Input Devices
#
CONFIG_USB_HID=y
CONFIG_HID_PID=y
CONFIG_USB_HIDDEV=y

#
# Special HID drivers
#
CONFIG_HID_A4TECH=y
# CONFIG_HID_ACRUX is not set
CONFIG_HID_APPLE=y
CONFIG_HID_BELKIN=y
CONFIG_HID_CHERRY=y
CONFIG_HID_CHICONY=y
# CONFIG_HID_PRODIKEYS is not set
CONFIG_HID_CYPRESS=y
CONFIG_HID_DRAGONRISE=y
# CONFIG_DRAGONRISE_FF is not set
# CONFIG_HID_EMS_FF is not set
CONFIG_HID_EZKEY=y
# CONFIG_HID_KEYTOUCH is not set
CONFIG_HID_KYE=y
# CONFIG_HID_UCLOGIC is not set
# CONFIG_HID_WALTOP is not set
CONFIG_HID_GYRATION=y
CONFIG_HID_TWINHAN=y
CONFIG_HID_KENSINGTON=y
# CONFIG_HID_LCPOWER is not set
CONFIG_HID_LOGITECH=y
# CONFIG_LOGITECH_FF is not set
# CONFIG_LOGIRUMBLEPAD2_FF is not set
# CONFIG_LOGIG940_FF is not set
# CONFIG_LOGIWII_FF is not set
CONFIG_HID_MICROSOFT=y
CONFIG_HID_MONTEREY=y
# CONFIG_HID_MULTITOUCH is not set
CONFIG_HID_NTRIG=y
CONFIG_HID_ORTEK=y
CONFIG_HID_PANTHERLORD=y
# CONFIG_PANTHERLORD_FF is not set
CONFIG_HID_PETALYNX=y
# CONFIG_HID_PICOLCD is not set
# CONFIG_HID_QUANTA is not set
# CONFIG_HID_ROCCAT is not set
# CONFIG_HID_ROCCAT_ARVO is not set
# CONFIG_HID_ROCCAT_KONE is not set
# CONFIG_HID_ROCCAT_KONEPLUS is not set
# CONFIG_HID_ROCCAT_KOVAPLUS is not set
# CONFIG_HID_ROCCAT_PYRA is not set
CONFIG_HID_SAMSUNG=y
CONFIG_HID_SONY=y
CONFIG_HID_SUNPLUS=y
CONFIG_HID_GREENASIA=y
# CONFIG_GREENASIA_FF is not set
CONFIG_HID_SMARTJOYPLUS=y
# CONFIG_SMARTJOYPLUS_FF is not set
CONFIG_HID_TOPSEED=y
CONFIG_HID_THRUSTMASTER=y
# CONFIG_THRUSTMASTER_FF is not set
CONFIG_HID_ZEROPLUS=y
# CONFIG_ZEROPLUS_FF is not set
# CONFIG_HID_ZYDACRON is not set
CONFIG_USB_SUPPORT=y
CONFIG_USB_ARCH_HAS_HCD=y
CONFIG_USB_ARCH_HAS_OHCI=y
CONFIG_USB_ARCH_HAS_EHCI=y
CONFIG_USB=y
CONFIG_USB_DEBUG=y
CONFIG_USB_ANNOUNCE_NEW_DEVICES=y

#
# Miscellaneous USB options
#
# CONFIG_USB_DEVICEFS is not set
# CONFIG_USB_DEVICE_CLASS is not set
CONFIG_USB_DYNAMIC_MINORS=y
# CONFIG_USB_SUSPEND is not set
# CONFIG_USB_MON is not set
# CONFIG_USB_WUSB is not set
# CONFIG_USB_WUSB_CBAF is not set

#
# USB Host Controller Drivers
#
# CONFIG_USB_C67X00_HCD is not set
# CONFIG_USB_XHCI_HCD is not set
CONFIG_USB_EHCI_HCD=y
CONFIG_USB_EHCI_ROOT_HUB_TT=y
CONFIG_USB_EHCI_TT_NEWSCHED=y
# CONFIG_USB_OXU210HP_HCD is not set
# CONFIG_USB_ISP116X_HCD is not set
# CONFIG_USB_ISP1760_HCD is not set
# CONFIG_USB_ISP1362_HCD is not set
CONFIG_USB_OHCI_HCD=y
# CONFIG_USB_OHCI_BIG_ENDIAN_DESC is not set
# CONFIG_USB_OHCI_BIG_ENDIAN_MMIO is not set
CONFIG_USB_OHCI_LITTLE_ENDIAN=y
CONFIG_USB_UHCI_HCD=y
# CONFIG_USB_SL811_HCD is not set
# CONFIG_USB_R8A66597_HCD is not set
# CONFIG_USB_WHCI_HCD is not set
# CONFIG_USB_HWA_HCD is not set

#
# USB Device Class drivers
#
CONFIG_USB_ACM=y
CONFIG_USB_PRINTER=y
CONFIG_USB_WDM=m
# CONFIG_USB_TMC is not set

#
# NOTE: USB_STORAGE depends on SCSI but BLK_DEV_SD may
#

#
# also be needed; see USB_STORAGE Help for more info
#
CONFIG_USB_STORAGE=m
# CONFIG_USB_STORAGE_DEBUG is not set
CONFIG_USB_STORAGE_REALTEK=m
CONFIG_USB_STORAGE_DATAFAB=m
CONFIG_USB_STORAGE_FREECOM=m
CONFIG_USB_STORAGE_ISD200=m
CONFIG_USB_STORAGE_USBAT=m
CONFIG_USB_STORAGE_SDDR09=m
CONFIG_USB_STORAGE_SDDR55=m
CONFIG_USB_STORAGE_JUMPSHOT=m
CONFIG_USB_STORAGE_ALAUDA=m
CONFIG_USB_STORAGE_ONETOUCH=m
CONFIG_USB_STORAGE_KARMA=m
CONFIG_USB_STORAGE_CYPRESS_ATACB=m
# CONFIG_USB_STORAGE_ENE_UB6250 is not set
CONFIG_USB_UAS=m
CONFIG_USB_LIBUSUAL=y

#
# USB Imaging devices
#
# CONFIG_USB_MDC800 is not set
# CONFIG_USB_MICROTEK is not set

#
# USB port drivers
#
CONFIG_USB_SERIAL=m
# CONFIG_USB_EZUSB is not set
CONFIG_USB_SERIAL_GENERIC=y
# CONFIG_USB_SERIAL_AIRCABLE is not set
# CONFIG_USB_SERIAL_ARK3116 is not set
# CONFIG_USB_SERIAL_BELKIN is not set
# CONFIG_USB_SERIAL_CH341 is not set
# CONFIG_USB_SERIAL_WHITEHEAT is not set
# CONFIG_USB_SERIAL_DIGI_ACCELEPORT is not set
CONFIG_USB_SERIAL_CP210X=m
# CONFIG_USB_SERIAL_CYPRESS_M8 is not set
# CONFIG_USB_SERIAL_EMPEG is not set
# CONFIG_USB_SERIAL_FTDI_SIO is not set
# CONFIG_USB_SERIAL_FUNSOFT is not set
# CONFIG_USB_SERIAL_VISOR is not set
# CONFIG_USB_SERIAL_IPAQ is not set
# CONFIG_USB_SERIAL_IR is not set
# CONFIG_USB_SERIAL_EDGEPORT is not set
# CONFIG_USB_SERIAL_EDGEPORT_TI is not set
# CONFIG_USB_SERIAL_GARMIN is not set
# CONFIG_USB_SERIAL_IPW is not set
# CONFIG_USB_SERIAL_IUU is not set
# CONFIG_USB_SERIAL_KEYSPAN_PDA is not set
# CONFIG_USB_SERIAL_KEYSPAN is not set
# CONFIG_USB_SERIAL_KLSI is not set
# CONFIG_USB_SERIAL_KOBIL_SCT is not set
# CONFIG_USB_SERIAL_MCT_U232 is not set
# CONFIG_USB_SERIAL_MOS7720 is not set
# CONFIG_USB_SERIAL_MOS7840 is not set
# CONFIG_USB_SERIAL_MOTOROLA is not set
# CONFIG_USB_SERIAL_NAVMAN is not set
CONFIG_USB_SERIAL_PL2303=m
# CONFIG_USB_SERIAL_OTI6858 is not set
# CONFIG_USB_SERIAL_QCAUX is not set
# CONFIG_USB_SERIAL_QUALCOMM is not set
# CONFIG_USB_SERIAL_SPCP8X5 is not set
# CONFIG_USB_SERIAL_HP4X is not set
# CONFIG_USB_SERIAL_SAFE is not set
# CONFIG_USB_SERIAL_SIEMENS_MPI is not set
# CONFIG_USB_SERIAL_SIERRAWIRELESS is not set
# CONFIG_USB_SERIAL_SYMBOL is not set
# CONFIG_USB_SERIAL_TI is not set
# CONFIG_USB_SERIAL_CYBERJACK is not set
# CONFIG_USB_SERIAL_XIRCOM is not set
CONFIG_USB_SERIAL_WWAN=m
CONFIG_USB_SERIAL_OPTION=m
# CONFIG_USB_SERIAL_OMNINET is not set
# CONFIG_USB_SERIAL_OPTICON is not set
# CONFIG_USB_SERIAL_VIVOPAY_SERIAL is not set
# CONFIG_USB_SERIAL_ZIO is not set
# CONFIG_USB_SERIAL_SSU100 is not set
# CONFIG_USB_SERIAL_DEBUG is not set

#
# USB Miscellaneous drivers
#
# CONFIG_USB_EMI62 is not set
# CONFIG_USB_EMI26 is not set
# CONFIG_USB_ADUTUX is not set
# CONFIG_USB_SEVSEG is not set
# CONFIG_USB_RIO500 is not set
# CONFIG_USB_LEGOTOWER is not set
# CONFIG_USB_LCD is not set
# CONFIG_USB_LED is not set
# CONFIG_USB_CYPRESS_CY7C63 is not set
# CONFIG_USB_CYTHERM is not set
# CONFIG_USB_IDMOUSE is not set
# CONFIG_USB_FTDI_ELAN is not set
# CONFIG_USB_APPLEDISPLAY is not set
# CONFIG_USB_SISUSBVGA is not set
CONFIG_USB_LD=m
# CONFIG_USB_TRANCEVIBRATOR is not set
# CONFIG_USB_IOWARRIOR is not set
# CONFIG_USB_TEST is not set
# CONFIG_USB_ISIGHTFW is not set
# CONFIG_USB_YUREX is not set
# CONFIG_USB_GADGET is not set

#
# OTG and related infrastructure
#
# CONFIG_NOP_USB_XCEIV is not set
# CONFIG_UWB is not set
# CONFIG_MMC is not set
# CONFIG_MEMSTICK is not set
CONFIG_NEW_LEDS=y
CONFIG_LEDS_CLASS=y

#
# LED drivers
#
# CONFIG_LEDS_LM3530 is not set
# CONFIG_LEDS_ALIX2 is not set
# CONFIG_LEDS_PCA9532 is not set
# CONFIG_LEDS_LP3944 is not set
# CONFIG_LEDS_LP5521 is not set
# CONFIG_LEDS_LP5523 is not set
# CONFIG_LEDS_CLEVO_MAIL is not set
# CONFIG_LEDS_PCA955X is not set
# CONFIG_LEDS_BD2802 is not set
# CONFIG_LEDS_INTEL_SS4200 is not set
# CONFIG_LEDS_DELL_NETBOOKS is not set
CONFIG_LEDS_TRIGGERS=y

#
# LED Triggers
#
# CONFIG_LEDS_TRIGGER_TIMER is not set
# CONFIG_LEDS_TRIGGER_HEARTBEAT is not set
# CONFIG_LEDS_TRIGGER_BACKLIGHT is not set
# CONFIG_LEDS_TRIGGER_DEFAULT_ON is not set

#
# iptables trigger is under Netfilter config (LED target)
#
# CONFIG_NFC_DEVICES is not set
# CONFIG_ACCESSIBILITY is not set
# CONFIG_INFINIBAND is not set
CONFIG_EDAC=y

#
# Reporting subsystems
#
# CONFIG_EDAC_DEBUG is not set
CONFIG_EDAC_DECODE_MCE=y
# CONFIG_EDAC_MCE_INJ is not set
CONFIG_EDAC_MM_EDAC=y
# CONFIG_EDAC_AMD64 is not set
CONFIG_EDAC_E752X=y
CONFIG_EDAC_I82975X=y
CONFIG_EDAC_I3000=y
CONFIG_EDAC_I3200=y
CONFIG_EDAC_X38=y
CONFIG_EDAC_I5400=y
# CONFIG_EDAC_I7CORE is not set
CONFIG_EDAC_I5000=y
CONFIG_EDAC_I5100=y
# CONFIG_EDAC_I7300 is not set
CONFIG_RTC_LIB=y
CONFIG_RTC_CLASS=y
CONFIG_RTC_HCTOSYS=y
CONFIG_RTC_HCTOSYS_DEVICE="rtc0"
# CONFIG_RTC_DEBUG is not set

#
# RTC interfaces
#
CONFIG_RTC_INTF_SYSFS=y
CONFIG_RTC_INTF_PROC=y
CONFIG_RTC_INTF_DEV=y
# CONFIG_RTC_INTF_DEV_UIE_EMUL is not set
# CONFIG_RTC_DRV_TEST is not set

#
# I2C RTC drivers
#
# CONFIG_RTC_DRV_DS1307 is not set
# CONFIG_RTC_DRV_DS1374 is not set
# CONFIG_RTC_DRV_DS1672 is not set
# CONFIG_RTC_DRV_DS3232 is not set
# CONFIG_RTC_DRV_MAX6900 is not set
# CONFIG_RTC_DRV_RS5C372 is not set
# CONFIG_RTC_DRV_ISL1208 is not set
# CONFIG_RTC_DRV_ISL12022 is not set
# CONFIG_RTC_DRV_X1205 is not set
# CONFIG_RTC_DRV_PCF8563 is not set
# CONFIG_RTC_DRV_PCF8583 is not set
# CONFIG_RTC_DRV_M41T80 is not set
# CONFIG_RTC_DRV_BQ32K is not set
# CONFIG_RTC_DRV_S35390A is not set
# CONFIG_RTC_DRV_FM3130 is not set
# CONFIG_RTC_DRV_RX8581 is not set
# CONFIG_RTC_DRV_RX8025 is not set
# CONFIG_RTC_DRV_EM3027 is not set
# CONFIG_RTC_DRV_RV3029C2 is not set

#
# SPI RTC drivers
#

#
# Platform RTC drivers
#
CONFIG_RTC_DRV_CMOS=y
# CONFIG_RTC_DRV_DS1286 is not set
# CONFIG_RTC_DRV_DS1511 is not set
# CONFIG_RTC_DRV_DS1553 is not set
# CONFIG_RTC_DRV_DS1742 is not set
# CONFIG_RTC_DRV_STK17TA8 is not set
# CONFIG_RTC_DRV_M48T86 is not set
# CONFIG_RTC_DRV_M48T35 is not set
# CONFIG_RTC_DRV_M48T59 is not set
# CONFIG_RTC_DRV_MSM6242 is not set
# CONFIG_RTC_DRV_BQ4802 is not set
# CONFIG_RTC_DRV_RP5C01 is not set
# CONFIG_RTC_DRV_V3020 is not set

#
# on-CPU RTC drivers
#
# CONFIG_DMADEVICES is not set
# CONFIG_AUXDISPLAY is not set
CONFIG_UIO=y
# CONFIG_UIO_CIF is not set
# CONFIG_UIO_PDRV is not set
# CONFIG_UIO_PDRV_GENIRQ is not set
# CONFIG_UIO_AEC is not set
# CONFIG_UIO_SERCOS3 is not set
# CONFIG_UIO_PCI_GENERIC is not set
# CONFIG_UIO_NETX is not set
CONFIG_STAGING=y
# CONFIG_ET131X is not set
# CONFIG_SLICOSS is not set
# CONFIG_USBIP_CORE is not set
# CONFIG_ECHO is not set
# CONFIG_BRCMUTIL is not set
# CONFIG_COMEDI is not set
# CONFIG_ASUS_OLED is not set
# CONFIG_RTS_PSTOR is not set
# CONFIG_TRANZPORT is not set
# CONFIG_POHMELFS is not set
# CONFIG_IDE_PHISON is not set
# CONFIG_LINE6_USB is not set
# CONFIG_DRM_VMWGFX is not set
# CONFIG_DRM_NOUVEAU is not set

#
# I2C encoder or helper chips
#
# CONFIG_DRM_I2C_CH7006 is not set
# CONFIG_DRM_I2C_SIL164 is not set
# CONFIG_USB_SERIAL_QUATECH2 is not set
# CONFIG_USB_SERIAL_QUATECH_USB2 is not set
# CONFIG_HYPERV is not set
# CONFIG_VME_BUS is not set
# CONFIG_DX_SEP is not set
# CONFIG_IIO is not set
CONFIG_XVMALLOC=y
CONFIG_ZRAM=y
# CONFIG_ZRAM_DEBUG is not set
CONFIG_ZCACHE=y
# CONFIG_FB_SM7XX is not set
# CONFIG_CRYSTALHD is not set
# CONFIG_FB_XGI is not set
# CONFIG_ACPI_QUICKSTART is not set
CONFIG_MACH_NO_WESTBRIDGE=y
# CONFIG_USB_ENESTORAGE is not set
# CONFIG_BCM_WIMAX is not set
# CONFIG_FT1000 is not set

#
# Speakup console speech
#
# CONFIG_SPEAKUP is not set
# CONFIG_TOUCHSCREEN_SYNAPTICS_I2C_RMI4 is not set
# CONFIG_DRM_PSB is not set

#
# Altera FPGA firmware download module
#
# CONFIG_ALTERA_STAPL is not set
CONFIG_INTEL_MEI=y
CONFIG_X86_PLATFORM_DEVICES=y
# CONFIG_ACER_WMI is not set
# CONFIG_ACERHDF is not set
# CONFIG_ASUS_LAPTOP is not set
CONFIG_DELL_WMI=y
# CONFIG_DELL_WMI_AIO is not set
# CONFIG_FUJITSU_LAPTOP is not set
# CONFIG_HP_ACCEL is not set
# CONFIG_HP_WMI is not set
# CONFIG_PANASONIC_LAPTOP is not set
# CONFIG_THINKPAD_ACPI is not set
CONFIG_SENSORS_HDAPS=y
CONFIG_INTEL_MENLOW=y
CONFIG_ACPI_WMI=y
# CONFIG_MSI_WMI is not set
# CONFIG_ACPI_ASUS is not set
# CONFIG_TOPSTAR_LAPTOP is not set
# CONFIG_ACPI_TOSHIBA is not set
# CONFIG_TOSHIBA_BT_RFKILL is not set
# CONFIG_ACPI_CMPC is not set
# CONFIG_INTEL_IPS is not set
# CONFIG_IBM_RTL is not set
# CONFIG_XO15_EBOOK is not set
# CONFIG_MXM_WMI is not set

#
# Firmware Drivers
#
# CONFIG_EDD is not set
CONFIG_FIRMWARE_MEMMAP=y
# CONFIG_DELL_RBU is not set
# CONFIG_DCDBAS is not set
# CONFIG_DMIID is not set
# CONFIG_DMI_SYSFS is not set
# CONFIG_ISCSI_IBFT_FIND is not set
# CONFIG_SIGMA is not set
# CONFIG_GOOGLE_FIRMWARE is not set

#
# File systems
#
# CONFIG_EXT2_FS is not set
# CONFIG_EXT3_FS is not set
CONFIG_EXT4_FS=y
CONFIG_EXT4_USE_FOR_EXT23=y
# CONFIG_EXT4_FS_XATTR is not set
# CONFIG_EXT4_DEBUG is not set
CONFIG_JBD2=y
# CONFIG_REISERFS_FS is not set
# CONFIG_JFS_FS is not set
CONFIG_XFS_FS=y
# CONFIG_XFS_QUOTA is not set
# CONFIG_XFS_POSIX_ACL is not set
# CONFIG_XFS_RT is not set
# CONFIG_XFS_DEBUG is not set
# CONFIG_GFS2_FS is not set
# CONFIG_BTRFS_FS is not set
CONFIG_NILFS2_FS=y
# CONFIG_FS_POSIX_ACL is not set
CONFIG_EXPORTFS=y
CONFIG_FILE_LOCKING=y
CONFIG_FSNOTIFY=y
CONFIG_DNOTIFY=y
CONFIG_INOTIFY_USER=y
CONFIG_FANOTIFY=y
# CONFIG_QUOTA is not set
# CONFIG_QUOTACTL is not set
CONFIG_AUTOFS4_FS=y
CONFIG_FUSE_FS=m
# CONFIG_CUSE is not set

#
# Caches
#
# CONFIG_FSCACHE is not set

#
# CD-ROM/DVD Filesystems
#
CONFIG_ISO9660_FS=y
CONFIG_JOLIET=y
CONFIG_ZISOFS=y
# CONFIG_UDF_FS is not set

#
# DOS/FAT/NT Filesystems
#
CONFIG_FAT_FS=y
CONFIG_MSDOS_FS=y
CONFIG_VFAT_FS=y
CONFIG_FAT_DEFAULT_CODEPAGE=437
CONFIG_FAT_DEFAULT_IOCHARSET="iso8859-1"
CONFIG_NTFS_FS=m
# CONFIG_NTFS_DEBUG is not set
# CONFIG_NTFS_RW is not set

#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
CONFIG_PROC_KCORE=y
CONFIG_PROC_VMCORE=y
CONFIG_PROC_SYSCTL=y
CONFIG_PROC_PAGE_MONITOR=y
CONFIG_SYSFS=y
CONFIG_TMPFS=y
# CONFIG_TMPFS_POSIX_ACL is not set
# CONFIG_TMPFS_XATTR is not set
CONFIG_HUGETLBFS=y
CONFIG_HUGETLB_PAGE=y
# CONFIG_CONFIGFS_FS is not set
CONFIG_MISC_FILESYSTEMS=y
# CONFIG_ADFS_FS is not set
# CONFIG_AFFS_FS is not set
CONFIG_HFS_FS=m
CONFIG_HFSPLUS_FS=m
# CONFIG_BEFS_FS is not set
# CONFIG_BFS_FS is not set
# CONFIG_EFS_FS is not set
# CONFIG_LOGFS is not set
# CONFIG_CRAMFS is not set
# CONFIG_SQUASHFS is not set
# CONFIG_VXFS_FS is not set
# CONFIG_MINIX_FS is not set
# CONFIG_OMFS_FS is not set
# CONFIG_HPFS_FS is not set
# CONFIG_QNX4FS_FS is not set
# CONFIG_ROMFS_FS is not set
CONFIG_PSTORE=y
# CONFIG_SYSV_FS is not set
# CONFIG_UFS_FS is not set
CONFIG_NETWORK_FILESYSTEMS=y
# CONFIG_NFS_FS is not set
# CONFIG_NFSD is not set
# CONFIG_CEPH_FS is not set
CONFIG_CIFS=m
# CONFIG_CIFS_STATS is not set
# CONFIG_CIFS_WEAK_PW_HASH is not set
CONFIG_CIFS_XATTR=y
CONFIG_CIFS_POSIX=y
# CONFIG_CIFS_DEBUG2 is not set
# CONFIG_CIFS_NFSD_EXPORT is not set
# CONFIG_NCP_FS is not set
# CONFIG_CODA_FS is not set
# CONFIG_AFS_FS is not set
CONFIG_9P_FS=m
# CONFIG_9P_FS_POSIX_ACL is not set

#
# Partition Types
#
CONFIG_PARTITION_ADVANCED=y
# CONFIG_ACORN_PARTITION is not set
# CONFIG_OSF_PARTITION is not set
# CONFIG_AMIGA_PARTITION is not set
# CONFIG_ATARI_PARTITION is not set
CONFIG_MAC_PARTITION=y
CONFIG_MSDOS_PARTITION=y
# CONFIG_BSD_DISKLABEL is not set
# CONFIG_MINIX_SUBPARTITION is not set
# CONFIG_SOLARIS_X86_PARTITION is not set
# CONFIG_UNIXWARE_DISKLABEL is not set
CONFIG_LDM_PARTITION=y
# CONFIG_LDM_DEBUG is not set
# CONFIG_SGI_PARTITION is not set
# CONFIG_ULTRIX_PARTITION is not set
# CONFIG_SUN_PARTITION is not set
CONFIG_KARMA_PARTITION=y
# CONFIG_EFI_PARTITION is not set
# CONFIG_SYSV68_PARTITION is not set
CONFIG_NLS=y
CONFIG_NLS_DEFAULT="utf8"
CONFIG_NLS_CODEPAGE_437=y
# CONFIG_NLS_CODEPAGE_737 is not set
# CONFIG_NLS_CODEPAGE_775 is not set
CONFIG_NLS_CODEPAGE_850=y
CONFIG_NLS_CODEPAGE_852=y
# CONFIG_NLS_CODEPAGE_855 is not set
# CONFIG_NLS_CODEPAGE_857 is not set
# CONFIG_NLS_CODEPAGE_860 is not set
# CONFIG_NLS_CODEPAGE_861 is not set
# CONFIG_NLS_CODEPAGE_862 is not set
# CONFIG_NLS_CODEPAGE_863 is not set
# CONFIG_NLS_CODEPAGE_864 is not set
# CONFIG_NLS_CODEPAGE_865 is not set
# CONFIG_NLS_CODEPAGE_866 is not set
# CONFIG_NLS_CODEPAGE_869 is not set
# CONFIG_NLS_CODEPAGE_936 is not set
# CONFIG_NLS_CODEPAGE_950 is not set
# CONFIG_NLS_CODEPAGE_932 is not set
# CONFIG_NLS_CODEPAGE_949 is not set
# CONFIG_NLS_CODEPAGE_874 is not set
# CONFIG_NLS_ISO8859_8 is not set
CONFIG_NLS_CODEPAGE_1250=y
# CONFIG_NLS_CODEPAGE_1251 is not set
CONFIG_NLS_ASCII=y
CONFIG_NLS_ISO8859_1=y
CONFIG_NLS_ISO8859_2=y
# CONFIG_NLS_ISO8859_3 is not set
# CONFIG_NLS_ISO8859_4 is not set
# CONFIG_NLS_ISO8859_5 is not set
# CONFIG_NLS_ISO8859_6 is not set
# CONFIG_NLS_ISO8859_7 is not set
# CONFIG_NLS_ISO8859_9 is not set
# CONFIG_NLS_ISO8859_13 is not set
# CONFIG_NLS_ISO8859_14 is not set
# CONFIG_NLS_ISO8859_15 is not set
# CONFIG_NLS_KOI8_R is not set
# CONFIG_NLS_KOI8_U is not set
CONFIG_NLS_UTF8=y

#
# Kernel hacking
#
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
# CONFIG_PRINTK_TIME is not set
CONFIG_DEFAULT_MESSAGE_LOGLEVEL=4
# CONFIG_ENABLE_WARN_DEPRECATED is not set
# CONFIG_ENABLE_MUST_CHECK is not set
CONFIG_FRAME_WARN=0
CONFIG_MAGIC_SYSRQ=y
CONFIG_STRIP_ASM_SYMS=y
# CONFIG_UNUSED_SYMBOLS is not set
# CONFIG_DEBUG_FS is not set
# CONFIG_HEADERS_CHECK is not set
# CONFIG_DEBUG_SECTION_MISMATCH is not set
CONFIG_DEBUG_KERNEL=y
# CONFIG_DEBUG_SHIRQ is not set
# CONFIG_LOCKUP_DETECTOR is not set
# CONFIG_HARDLOCKUP_DETECTOR is not set
# CONFIG_DETECT_HUNG_TASK is not set
# CONFIG_SCHED_DEBUG is not set
# CONFIG_SCHEDSTATS is not set
# CONFIG_TIMER_STATS is not set
# CONFIG_DEBUG_OBJECTS is not set
# CONFIG_SLUB_DEBUG_ON is not set
# CONFIG_SLUB_STATS is not set
# CONFIG_DEBUG_KMEMLEAK is not set
CONFIG_DEBUG_PREEMPT=y
# CONFIG_DEBUG_RT_MUTEXES is not set
# CONFIG_RT_MUTEX_TESTER is not set
# CONFIG_DEBUG_SPINLOCK is not set
# CONFIG_DEBUG_MUTEXES is not set
# CONFIG_DEBUG_LOCK_ALLOC is not set
# CONFIG_PROVE_LOCKING is not set
# CONFIG_SPARSE_RCU_POINTER is not set
# CONFIG_LOCK_STAT is not set
# CONFIG_DEBUG_SPINLOCK_SLEEP is not set
# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
# CONFIG_DEBUG_STACK_USAGE is not set
# CONFIG_DEBUG_KOBJECT is not set
CONFIG_DEBUG_BUGVERBOSE=y
CONFIG_DEBUG_INFO=y
# CONFIG_DEBUG_INFO_REDUCED is not set
# CONFIG_DEBUG_VM is not set
# CONFIG_DEBUG_VIRTUAL is not set
# CONFIG_DEBUG_WRITECOUNT is not set
CONFIG_DEBUG_MEMORY_INIT=y
# CONFIG_DEBUG_LIST is not set
# CONFIG_TEST_LIST_SORT is not set
# CONFIG_DEBUG_SG is not set
# CONFIG_DEBUG_NOTIFIERS is not set
# CONFIG_DEBUG_CREDENTIALS is not set
CONFIG_ARCH_WANT_FRAME_POINTERS=y
CONFIG_FRAME_POINTER=y
# CONFIG_BOOT_PRINTK_DELAY is not set
# CONFIG_RCU_TORTURE_TEST is not set
CONFIG_RCU_CPU_STALL_TIMEOUT=60
# CONFIG_RCU_CPU_STALL_VERBOSE is not set
# CONFIG_BACKTRACE_SELF_TEST is not set
# CONFIG_DEBUG_BLOCK_EXT_DEVT is not set
# CONFIG_DEBUG_FORCE_WEAK_PER_CPU is not set
# CONFIG_DEBUG_PER_CPU_MAPS is not set
# CONFIG_CPU_NOTIFIER_ERROR_INJECT is not set
# CONFIG_FAULT_INJECTION is not set
# CONFIG_LATENCYTOP is not set
# CONFIG_SYSCTL_SYSCALL_CHECK is not set
# CONFIG_DEBUG_PAGEALLOC is not set
CONFIG_USER_STACKTRACE_SUPPORT=y
CONFIG_HAVE_FUNCTION_TRACER=y
CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
CONFIG_HAVE_FUNCTION_GRAPH_FP_TEST=y
CONFIG_HAVE_FUNCTION_TRACE_MCOUNT_TEST=y
CONFIG_HAVE_DYNAMIC_FTRACE=y
CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
CONFIG_HAVE_C_RECORDMCOUNT=y
CONFIG_TRACING_SUPPORT=y
# CONFIG_FTRACE is not set
# CONFIG_PROVIDE_OHCI1394_DMA_INIT is not set
# CONFIG_DMA_API_DEBUG is not set
# CONFIG_ATOMIC64_SELFTEST is not set
# CONFIG_SAMPLES is not set
CONFIG_HAVE_ARCH_KGDB=y
# CONFIG_KGDB is not set
CONFIG_HAVE_ARCH_KMEMCHECK=y
# CONFIG_TEST_KSTRTOX is not set
# CONFIG_STRICT_DEVMEM is not set
CONFIG_X86_VERBOSE_BOOTUP=y
CONFIG_EARLY_PRINTK=y
# CONFIG_EARLY_PRINTK_DBGP is not set
# CONFIG_DEBUG_STACKOVERFLOW is not set
# CONFIG_X86_PTDUMP is not set
CONFIG_DEBUG_RODATA=y
CONFIG_DEBUG_RODATA_TEST=y
CONFIG_DEBUG_SET_MODULE_RONX=y
# CONFIG_DEBUG_NX_TEST is not set
# CONFIG_IOMMU_DEBUG is not set
# CONFIG_IOMMU_STRESS is not set
CONFIG_HAVE_MMIOTRACE_SUPPORT=y
CONFIG_IO_DELAY_TYPE_0X80=0
CONFIG_IO_DELAY_TYPE_0XED=1
CONFIG_IO_DELAY_TYPE_UDELAY=2
CONFIG_IO_DELAY_TYPE_NONE=3
# CONFIG_IO_DELAY_0X80 is not set
# CONFIG_IO_DELAY_0XED is not set
# CONFIG_IO_DELAY_UDELAY is not set
CONFIG_IO_DELAY_NONE=y
CONFIG_DEFAULT_IO_DELAY_TYPE=3
# CONFIG_CPA_DEBUG is not set
CONFIG_OPTIMIZE_INLINING=y
# CONFIG_DEBUG_STRICT_USER_COPY_CHECKS is not set

#
# Security options
#
# CONFIG_KEYS is not set
# CONFIG_SECURITY_DMESG_RESTRICT is not set
# CONFIG_SECURITY is not set
# CONFIG_SECURITYFS is not set
# CONFIG_INTEL_TXT is not set
CONFIG_DEFAULT_SECURITY_DAC=y
CONFIG_DEFAULT_SECURITY=""
CONFIG_CRYPTO=y

#
# Crypto core or helper
#
CONFIG_CRYPTO_ALGAPI=y
CONFIG_CRYPTO_ALGAPI2=y
CONFIG_CRYPTO_AEAD2=y
CONFIG_CRYPTO_BLKCIPHER=y
CONFIG_CRYPTO_BLKCIPHER2=y
CONFIG_CRYPTO_HASH=y
CONFIG_CRYPTO_HASH2=y
CONFIG_CRYPTO_RNG2=y
CONFIG_CRYPTO_PCOMP2=y
CONFIG_CRYPTO_MANAGER=y
CONFIG_CRYPTO_MANAGER2=y
CONFIG_CRYPTO_MANAGER_DISABLE_TESTS=y
CONFIG_CRYPTO_GF128MUL=m
# CONFIG_CRYPTO_NULL is not set
# CONFIG_CRYPTO_PCRYPT is not set
CONFIG_CRYPTO_WORKQUEUE=y
CONFIG_CRYPTO_CRYPTD=y
# CONFIG_CRYPTO_AUTHENC is not set
# CONFIG_CRYPTO_TEST is not set

#
# Authenticated Encryption with Associated Data
#
# CONFIG_CRYPTO_CCM is not set
# CONFIG_CRYPTO_GCM is not set
# CONFIG_CRYPTO_SEQIV is not set

#
# Block modes
#
CONFIG_CRYPTO_CBC=m
# CONFIG_CRYPTO_CTR is not set
# CONFIG_CRYPTO_CTS is not set
CONFIG_CRYPTO_ECB=y
# CONFIG_CRYPTO_LRW is not set
# CONFIG_CRYPTO_PCBC is not set
CONFIG_CRYPTO_XTS=m

#
# Hash modes
#
CONFIG_CRYPTO_HMAC=m
# CONFIG_CRYPTO_XCBC is not set
# CONFIG_CRYPTO_VMAC is not set

#
# Digest
#
# CONFIG_CRYPTO_CRC32C is not set
# CONFIG_CRYPTO_CRC32C_INTEL is not set
# CONFIG_CRYPTO_GHASH is not set
CONFIG_CRYPTO_MD4=m
CONFIG_CRYPTO_MD5=m
# CONFIG_CRYPTO_MICHAEL_MIC is not set
# CONFIG_CRYPTO_RMD128 is not set
# CONFIG_CRYPTO_RMD160 is not set
# CONFIG_CRYPTO_RMD256 is not set
# CONFIG_CRYPTO_RMD320 is not set
# CONFIG_CRYPTO_SHA1 is not set
# CONFIG_CRYPTO_SHA256 is not set
# CONFIG_CRYPTO_SHA512 is not set
# CONFIG_CRYPTO_TGR192 is not set
CONFIG_CRYPTO_WP512=m
CONFIG_CRYPTO_GHASH_CLMUL_NI_INTEL=m

#
# Ciphers
#
CONFIG_CRYPTO_AES=y
CONFIG_CRYPTO_AES_X86_64=y
CONFIG_CRYPTO_AES_NI_INTEL=y
# CONFIG_CRYPTO_ANUBIS is not set
CONFIG_CRYPTO_ARC4=y
# CONFIG_CRYPTO_BLOWFISH is not set
# CONFIG_CRYPTO_CAMELLIA is not set
# CONFIG_CRYPTO_CAST5 is not set
# CONFIG_CRYPTO_CAST6 is not set
CONFIG_CRYPTO_DES=m
# CONFIG_CRYPTO_FCRYPT is not set
# CONFIG_CRYPTO_KHAZAD is not set
# CONFIG_CRYPTO_SALSA20 is not set
# CONFIG_CRYPTO_SALSA20_X86_64 is not set
# CONFIG_CRYPTO_SEED is not set
# CONFIG_CRYPTO_SERPENT is not set
# CONFIG_CRYPTO_TEA is not set
CONFIG_CRYPTO_TWOFISH=m
CONFIG_CRYPTO_TWOFISH_COMMON=m
CONFIG_CRYPTO_TWOFISH_X86_64=m

#
# Compression
#
# CONFIG_CRYPTO_DEFLATE is not set
# CONFIG_CRYPTO_ZLIB is not set
# CONFIG_CRYPTO_LZO is not set

#
# Random Number Generation
#
# CONFIG_CRYPTO_ANSI_CPRNG is not set
CONFIG_CRYPTO_USER_API=y
CONFIG_CRYPTO_USER_API_HASH=y
CONFIG_CRYPTO_USER_API_SKCIPHER=y
# CONFIG_CRYPTO_HW is not set
CONFIG_HAVE_KVM=y
# CONFIG_VIRTUALIZATION is not set
# CONFIG_BINARY_PRINTF is not set

#
# Library routines
#
CONFIG_BITREVERSE=y
CONFIG_GENERIC_FIND_FIRST_BIT=y
CONFIG_CRC_CCITT=m
CONFIG_CRC16=y
CONFIG_CRC_T10DIF=y
CONFIG_CRC_ITU_T=m
CONFIG_CRC32=y
# CONFIG_CRC7 is not set
# CONFIG_LIBCRC32C is not set
CONFIG_ZLIB_INFLATE=y
CONFIG_ZLIB_DEFLATE=m
CONFIG_LZO_COMPRESS=y
CONFIG_LZO_DECOMPRESS=y
CONFIG_XZ_DEC=y
CONFIG_XZ_DEC_X86=y
CONFIG_XZ_DEC_POWERPC=y
CONFIG_XZ_DEC_IA64=y
CONFIG_XZ_DEC_ARM=y
CONFIG_XZ_DEC_ARMTHUMB=y
CONFIG_XZ_DEC_SPARC=y
CONFIG_XZ_DEC_BCJ=y
# CONFIG_XZ_DEC_TEST is not set
CONFIG_TEXTSEARCH=y
CONFIG_TEXTSEARCH_KMP=m
CONFIG_TEXTSEARCH_BM=m
CONFIG_TEXTSEARCH_FSM=m
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT=y
CONFIG_HAS_DMA=y
CONFIG_CHECK_SIGNATURE=y
CONFIG_CPU_RMAP=y
CONFIG_NLATTR=y
# CONFIG_AVERAGE is not set

Re: Cleancache [2]

[Ryusuke Konishi]

2011/6/14 dexen deVries wrote:
> On Monday 13 June 2011 16:40:48 you wrote:
>> Is it reproducible without zcache?
>
> I don't know how to check cleancache without zcache; cleancache itself doesn't
> do anything unless it has some backend configured, and zcache is the only
> backend I know of and can use.
>
>
> To enable zcache you need to have one `zcache' argument in kernel's command
> line.
>
>
> There's an outstanding bug in zcache's build system:
> http://code.google.com/p/compcache/issues/detail?id=91
>
> In short, core part of zcache may end up not being compiled at all ;-(
>
> To build zcache in 3.0-rc2, you need to hack it a bit with the attach'd patch.
> Basically it renames the `zcache.c' to `zcache-core.c' and updates Makefile.
>
>
> To verify zcache is enabled, look through dmesg for two lines like:
>> zcache: cleancache enabled using kernel transcendent memory and compression
> buddies
>>zcache: created ephemeral tmem pool, id=0

Thanks a lot, dexen.

The oops has not been reproduced yet, but I could see
/sys/kernel/mm/cleancache/* change.

I will try to catch the issue again this weekend.

Thanks,
Ryusuke Konishi

> --
> dexen deVries
>
> ``One can't proceed from the informal to the formal by formal means.''
>
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Re: Cleancache [2]

[Ryusuke Konishi]

Hi dexen,
On Wed, 15 Jun 2011 01:17:28 +0900, Ryusuke Konishi wrote:
> 2011/6/14 dexen deVries wrote:
> > On Monday 13 June 2011 16:40:48 you wrote:
> >> Is it reproducible without zcache?
> >
> > I don't know how to check cleancache without zcache; cleancache itself doesn't
> > do anything unless it has some backend configured, and zcache is the only
> > backend I know of and can use.
> >
> >
> > To enable zcache you need to have one `zcache' argument in kernel's command
> > line.
> >
> >
> > There's an outstanding bug in zcache's build system:
> > http://code.google.com/p/compcache/issues/detail?id=91
> >
> > In short, core part of zcache may end up not being compiled at all ;-(
> >
> > To build zcache in 3.0-rc2, you need to hack it a bit with the attach'd patch.
> > Basically it renames the `zcache.c' to `zcache-core.c' and updates Makefile.
> >
> >
> > To verify zcache is enabled, look through dmesg for two lines like:
> >> zcache: cleancache enabled using kernel transcendent memory and compression
> > buddies
> >>zcache: created ephemeral tmem pool, id=0
> 
> Thanks a lot, dexen.
> 
> The oops has not been reproduced yet, but I could see
> /sys/kernel/mm/cleancache/* change.
> 
> I will try to catch the issue again this weekend.
> 
> Thanks,
> Ryusuke Konishi

I could find the cause of the oops - The following patch will fix it.

Anyhow, I noticed that cleancache may go wrong for nilfs2 since it
assumes each inode has only one pagecache but nilfs2 has actually two
pagecaches, data pages and btree node pages.

This can cause interference of pages between these two types of
caches.

I have no good idea to handle this problem.  Maybe, it needs some
change against the cleancache.


Also, I think this fix and your cleancache activation patch should be
sent to the next merge window instead of 3.0 because the current nilfs
does not enable cleancache so the issue never happens on the current
code base.


Regards,
Ryusuke Konishi

---
From: Ryusuke Konishi <konishi.ryusuke-Zyj7fXuS5i5L9jVzuh4AOg@public.gmane.org>

nilfs2: fix oops in nilfs_encode_fh after cleancache was enabled

Cleancache may call encode_fh() method even for inodes that never
appears on the namespace.  For the current nilfs, it is true of inodes
for metadata files and gccache.

For these inodes, nilfs_encode_bh should return an error code because
they are not exportable.  This fixes the issue and the kernel oops
caused by exporting such internal inodes.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke-Zyj7fXuS5i5L9jVzuh4AOg@public.gmane.org>
---
 fs/nilfs2/namei.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/fs/nilfs2/namei.c b/fs/nilfs2/namei.c
index 546849b..e92800c 100644
--- a/fs/nilfs2/namei.c
+++ b/fs/nilfs2/namei.c
@@ -532,6 +532,9 @@ static int nilfs_encode_fh(struct dentry *dentry, __u32 *fh, int *lenp,
 	struct nilfs_root *root = NILFS_I(inode)->i_root;
 	int type;
 
+	if (!root || NILFS_MDT_INODE(inode->i_sb, inode->i_ino))
+		return -EINVAL; /* unexportable inode (needed by cleancache) */
+
 	if (*lenp < NILFS_FID_SIZE_NON_CONNECTABLE ||
 	    (connectable && *lenp < NILFS_FID_SIZE_CONNECTABLE))
 		return 255;
-- 
1.7.3.5

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