Re: [patch 16/18] FS: Socket inode defragmentation

Re: [patch 16/18] FS: Socket inode defragmentation

[Andrew Morton]

On Fri, 04 Apr 2008 16:02:14 -0700 Christoph Lameter <clameter@sgi.com> wrote:

> From: Christoph Lameter <clameter@sgi.com>
> To: akpm@linux-foundation.org
> Cc: linux-mm@kvack.org
> Cc: Mel Gorman <mel@skynet.ie>
> Cc: andi@firstfloor.org
> Cc: Nick Piggin <npiggin@suse.de>
> Cc: Rik van Riel <riel@redhat.com>
> Cc: Pekka Enberg <penberg@cs.helsinki.fi>

The net people should get to hear about this, I guess..

> Support inode defragmentation for sockets
> 
> Reviewed-by: Rik van Riel <riel@redhat.com>
> Signed-off-by: Christoph Lameter <clameter@sgi.com>
> ---
>  net/socket.c |    8 ++++++++
>  1 files changed, 8 insertions(+), 0 deletions(-)
> 
> diff --git a/net/socket.c b/net/socket.c
> index 9d3fbfb..205f450 100644
> --- a/net/socket.c
> +++ b/net/socket.c
> @@ -269,6 +269,12 @@ static void init_once(struct kmem_cache *cachep, void *foo)
>  	inode_init_once(&ei->vfs_inode);
>  }
>  
> +static void *sock_get_inodes(struct kmem_cache *s, int nr, void **v)
> +{
> +	return fs_get_inodes(s, nr, v,
> +		offsetof(struct socket_alloc, vfs_inode));
> +}
> +
>  static int init_inodecache(void)
>  {
>  	sock_inode_cachep = kmem_cache_create("sock_inode_cache",
> @@ -280,6 +286,8 @@ static int init_inodecache(void)
>  					      init_once);
>  	if (sock_inode_cachep == NULL)
>  		return -ENOMEM;
> +	kmem_cache_setup_defrag(sock_inode_cachep,
> +			sock_get_inodes, kick_inodes);
>  	return 0;
>  }
>  

Re: [patch 01/18] SLUB: Add defrag_ratio field and sysfs support.

[Pekka J Enberg]

On Fri, 04 Apr 2008 16:01:59 -0700 Christoph Lameter <clameter@sgi.com> wrote:
> > +static ssize_t defrag_ratio_store(struct kmem_cache *s,
> > +				const char *buf, size_t length)
> > +{
> > +	int n = simple_strtoul(buf, NULL, 10);

On Mon, 7 Apr 2008, Andrew Morton wrote:
> WARNING: consider using strict_strtoul in preference to simple_strtoul
> #99: FILE: mm/slub.c:4038:
> +       int n = simple_strtoul(buf, NULL, 10);
> 
> total: 0 errors, 1 warnings, 49 lines checked
> 
> 
> It speaketh truth.

I fixed that up, thanks!

			Pekka

From: Christoph Lameter <clameter@sgi.com>
Subject: [PATCH] SLUB: Add defrag_ratio field and sysfs support.

The defrag_ratio is used to set the threshold at which defragmentation
should be run on a slabcache.

The allocation ratio is measured in the percentage of the available slots
allocated. The percentage will be lower for slabs that are more fragmented.

Add a defrag ratio field and set it to 30% by default. A limit of 30% specified
that less than 3 out of 10 available slots for objects are in use before
slab defragmeentation runs.

Reviewed-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
---
 include/linux/slub_def.h |    7 +++++++
 mm/slub.c                |   18 ++++++++++++++++++
 2 files changed, 25 insertions(+), 0 deletions(-)

Index: slab-2.6/include/linux/slub_def.h
===================================================================
--- slab-2.6.orig/include/linux/slub_def.h	2008-04-08 21:43:24.000000000 +0300
+++ slab-2.6/include/linux/slub_def.h	2008-04-08 21:44:03.000000000 +0300
@@ -88,6 +88,13 @@
 	void (*ctor)(struct kmem_cache *, void *);
 	int inuse;		/* Offset to metadata */
 	int align;		/* Alignment */
+	int defrag_ratio;	/*
+				 * Ratio used to check the percentage of
+				 * objects allocate in a slab page.
+				 * If less than this ratio is allocated
+				 * then reclaim attempts are made.
+				 */
+
 	const char *name;	/* Name (only for display!) */
 	struct list_head list;	/* List of slab caches */
 #ifdef CONFIG_SLUB_DEBUG
Index: slab-2.6/mm/slub.c
===================================================================
--- slab-2.6.orig/mm/slub.c	2008-04-08 21:43:37.000000000 +0300
+++ slab-2.6/mm/slub.c	2008-04-08 21:51:43.000000000 +0300
@@ -2332,6 +2332,7 @@
 		goto error;
 
 	s->refcount = 1;
+	s->defrag_ratio = 30;
 #ifdef CONFIG_NUMA
 	s->remote_node_defrag_ratio = 100;
 #endif
@@ -4025,6 +4026,27 @@
 }
 SLAB_ATTR_RO(free_calls);
 
+static ssize_t defrag_ratio_show(struct kmem_cache *s, char *buf)
+{
+	return sprintf(buf, "%d\n", s->defrag_ratio);
+}
+
+static ssize_t defrag_ratio_store(struct kmem_cache *s,
+				const char *buf, size_t length)
+{
+	unsigned long ratio;
+	int err;
+
+	err = strict_strtoul(buf, 10, &ratio);
+	if (err)
+		return err;
+
+	if (ratio < 100)
+		s->defrag_ratio = ratio;
+	return length;
+}
+SLAB_ATTR(defrag_ratio);
+
 #ifdef CONFIG_NUMA
 static ssize_t remote_node_defrag_ratio_show(struct kmem_cache *s, char *buf)
 {
@@ -4126,6 +4148,7 @@
 	&shrink_attr.attr,
 	&alloc_calls_attr.attr,
 	&free_calls_attr.attr,
+	&defrag_ratio_attr.attr,
 #ifdef CONFIG_ZONE_DMA
 	&cache_dma_attr.attr,
 #endif

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Re: [patch 03/18] SLUB: Add get() and kick() methods

[Pekka J Enberg]

On Fri, 04 Apr 2008 16:02:01 -0700 Christoph Lameter <clameter@sgi.com> wrote:
> > Add the two methods needed for defragmentation and add the display of the
> > methods via the proc interface.
> > 
> > Add documentation explaining the use of these methods.
> > 
> > +	void *(*get)(struct kmem_cache *, int nr, void **),
> > +	void (*kick)(struct kmem_cache *, int nr, void **, void *private)) {}
> > +	void *(*get)(struct kmem_cache *, int nr, void **),
> > +	void (*kick)(struct kmem_cache *, int nr, void **, void *private)) {}
> > +	void *(*get)(struct kmem_cache *, int nr, void **);
> > +	void (*kick)(struct kmem_cache *, int nr, void **, void *private);
> > +	void *(*get)(struct kmem_cache *, int nr, void **),
> > +	void (*kick)(struct kmem_cache *, int nr, void **, void *private));
> > +	void *(*get)(struct kmem_cache *, int nr, void **),
> > +	void (*kick)(struct kmem_cache *, int nr, void **, void *private))

On Mon, 7 Apr 2008, Andrew Morton wrote:
> This is one of the few instances where we do use typedefs.

Aye, aye, Cap'n!

			Pekka

From: Pekka Enberg <penberg@cs.helsinki.fi>
Subject: [PATCH] slub: use typedefs for ->get and ->kick functions

As suggested by Andrew Morton, use typedefs for the SLUB defragmentation ->get
and ->kick callback functions.

Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
---
 include/linux/slub_def.h |   12 +++++++-----
 mm/slub.c                |    5 ++---
 2 files changed, 9 insertions(+), 8 deletions(-)

Index: slab-2.6/include/linux/slub_def.h
===================================================================
--- slab-2.6.orig/include/linux/slub_def.h	2008-04-08 21:57:56.000000000 +0300
+++ slab-2.6/include/linux/slub_def.h	2008-04-08 22:00:29.000000000 +0300
@@ -38,6 +38,9 @@
 	SHRINK_OBJECT_RECLAIM_FAILED, /* Callbacks signaled busy objects */
 	NR_SLUB_STAT_ITEMS };
 
+typedef void *(*kmem_get_fn_t)(struct kmem_cache *, int, void **);
+typedef void (*kmem_kick_fn_t)(struct kmem_cache *, int, void **, void *);
+
 struct kmem_cache_cpu {
 	void **freelist;	/* Pointer to first free per cpu object */
 	struct page *page;	/* The slab from which we are allocating */
@@ -109,7 +112,7 @@
 	 * The array passed to get() is also passed to kick(). The
 	 * function may remove objects by setting array elements to NULL.
 	 */
-	void *(*get)(struct kmem_cache *, int nr, void **);
+	kmem_get_fn_t get;
 
 	/*
 	 * Called with no locks held and interrupts enabled.
@@ -122,7 +125,7 @@
 	 * Success is checked by examining the number of remaining
 	 * objects in the slab.
 	 */
-	void (*kick)(struct kmem_cache *, int nr, void **, void *private);
+	kmem_kick_fn_t kick;
 
 	int inuse;		/* Offset to metadata */
 	int align;		/* Alignment */
@@ -288,9 +291,8 @@
 }
 #endif
 
-void kmem_cache_setup_defrag(struct kmem_cache *s,
-	void *(*get)(struct kmem_cache *, int nr, void **),
-	void (*kick)(struct kmem_cache *, int nr, void **, void *private));
+void kmem_cache_setup_defrag(struct kmem_cache *s, kmem_get_fn_t get,
+			     kmem_kick_fn_t kick);
 int kmem_cache_defrag(int node);
 
 #endif /* _LINUX_SLUB_DEF_H */
Index: slab-2.6/mm/slub.c
===================================================================
--- slab-2.6.orig/mm/slub.c	2008-04-08 21:57:52.000000000 +0300
+++ slab-2.6/mm/slub.c	2008-04-08 22:01:22.000000000 +0300
@@ -2770,9 +2770,8 @@
 								GFP_KERNEL);
 }
 
-void kmem_cache_setup_defrag(struct kmem_cache *s,
-	void *(*get)(struct kmem_cache *, int nr, void **),
-	void (*kick)(struct kmem_cache *, int nr, void **, void *private))
+void kmem_cache_setup_defrag(struct kmem_cache *s, kmem_get_fn_t get,
+			     kmem_kick_fn_t kick)
 {
 	int max_objects = oo_objects(s->max);
 

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Re: [patch 04/18] SLUB: Sort slab cache list and establish maximum objects for defrag slabs

[Pekka Enberg]

Andrew Morton wrote:
>> +/* Maximum objects in defragmentable slabs */
>> +static unsigned int max_defrag_slab_objects = 0;
> 
> checkpatch, please (for heavens sake)

Fixed with bunch of other checkpatch errors and warnings. There are some 
80 column warnings remaining still though...

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Re: [patch 04/18] SLUB: Sort slab cache list and establish maximum objects for defrag slabs

[Christoph Lameter]

On Mon, 7 Apr 2008, Andrew Morton wrote:

> Use of __read_mostly would be appropriate here.

Lets not proliferate that stuff unnecessarily. Variable is not used in 
hot code paths.

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Re: [patch 04/18] SLUB: Sort slab cache list and establish maximum objects for defrag slabs

[Andi Kleen]

On Tue, Apr 08, 2008 at 02:01:12PM -0700, Christoph Lameter wrote:
> On Mon, 7 Apr 2008, Andrew Morton wrote:
> 
> > Use of __read_mostly would be appropriate here.
> 
> Lets not proliferate that stuff unnecessarily. Variable is not used in 
> hot code paths.

... and the hot paths should eventually move over to immediate values 
once that patch is in

-Andi

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Re: [patch 04/18] SLUB: Sort slab cache list and establish maximum objects for defrag slabs

[Pekka Enberg]

Hi Andrew,

On Tue, Apr 8, 2008 at 9:30 AM, Andrew Morton <akpm@linux-foundation.org> wrote:
>  > >  What the heck is oo_objects()?
>  >
>  > It's from the variable order patches. A cache has two orders: default
>  > order and the minimum order that we fall back to if default order
>  > allocations fail. We also have the same values for the number of
>  > objects per slab packed in a struct kmem_cache_order_objects. But yeah
>  > it's a terrible name...
>
>  umm, the phrase "what is X" is akpmese for "X should have been documented,
>  please fix".
>
>  I guess I should be explicit about that.

I looked at fixing this and noticed struct kmem_cache_order_object has
the following nice comment on top of it:

/*
 * Word size structure that can be atomically updated or read and that
 * contains both the order and the number of objects that a slab of the
 * given order would contain.
 */

Is that sufficient for you or do you want me to add kerneldoc style
comments on top of the actual oo_order() and oo_objects() functions?

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Re: [patch 05/18] SLUB: Slab defrag core

[Christoph Lameter]

On Mon, 7 Apr 2008, Andrew Morton wrote:

> >    Fragmentation is skipped if it was less than a tenth of a second since we
> >    last checked a slab cache. An unsuccessful defrag attempt pauses attempts
> >    for at least one second.
> 
> Can we not do this?  It's a really nasty hack.  Wall time has almost no
> correlation with reclaim and allocation activity.
> 
> If we really cannot think of anything smarter than just throttling then the
> decision regarding when to throttle and for how long should at least be
> driven by something which is vaguely correlated with the present/recent
> allocation/reclaim activity.

The reclaim interval increases to 1 second if slab reclaim was not 
succcessful.

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Re: [patch 05/18] SLUB: Slab defrag core

[Andrew Morton]

On Tue, 8 Apr 2008 14:02:46 -0700 (PDT) Christoph Lameter <clameter@sgi.com> wrote:

> On Mon, 7 Apr 2008, Andrew Morton wrote:
> 
> > >    Fragmentation is skipped if it was less than a tenth of a second since we
> > >    last checked a slab cache. An unsuccessful defrag attempt pauses attempts
> > >    for at least one second.
> > 
> > Can we not do this?  It's a really nasty hack.  Wall time has almost no
> > correlation with reclaim and allocation activity.
> > 
> > If we really cannot think of anything smarter than just throttling then the
> > decision regarding when to throttle and for how long should at least be
> > driven by something which is vaguely correlated with the present/recent
> > allocation/reclaim activity.
> 
> The reclaim interval increases to 1 second if slab reclaim was not 
> succcessful.

I know that.  It's still an arbitrary-to-the-point-of-uselessness hack.

Reclaim is clocked by scanning rates, allocation rates and disk speed.  Not
wall time.

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Re: [patch 05/18] SLUB: Slab defrag core

[Christoph Lameter]

On Tue, 8 Apr 2008, Andrew Morton wrote:

> I know that.  It's still an arbitrary-to-the-point-of-uselessness hack.
> 
> Reclaim is clocked by scanning rates, allocation rates and disk speed.  Not
> wall time.

Hmmmm... We could key it to the rate of free of objects that 
shrink_slab() has been able to accomplish? We already check for != 0 
there. The more are freed the more urgent to scan the partial lists for 
reclaimable slabs.


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Re: [patch 05/18] SLUB: Slab defrag core

[Andrew Morton]

On Tue, 8 Apr 2008 14:17:15 -0700 (PDT) Christoph Lameter <clameter@sgi.com> wrote:

> On Tue, 8 Apr 2008, Andrew Morton wrote:
> 
> > I know that.  It's still an arbitrary-to-the-point-of-uselessness hack.
> > 
> > Reclaim is clocked by scanning rates, allocation rates and disk speed.  Not
> > wall time.
> 
> Hmmmm... We could key it to the rate of free of objects that 
> shrink_slab() has been able to accomplish? We already check for != 0 
> there. The more are freed the more urgent to scan the partial lists for 
> reclaimable slabs.
> 

That's related to the scanning priority, isn't it?

It makes sense to pass the scan_control down into the shrinker callouts -
that has come up before.  That would provide access to the scanning
priority, as well as to anything else we want to toss in there in the future.

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Re: [patch 05/18] SLUB: Slab defrag core

[Christoph Lameter]

On Tue, 8 Apr 2008, Andrew Morton wrote:

> > Hmmmm... We could key it to the rate of free of objects that 
> > shrink_slab() has been able to accomplish? We already check for != 0 
> > there. The more are freed the more urgent to scan the partial lists for 
> > reclaimable slabs.
> > 
> 
> That's related to the scanning priority, isn't it?

Not directly. The number of scanned pages (which depends on the scannig 
priority) is passed down and then shrink_slab does some magic to do a 
couple of passes.

> It makes sense to pass the scan_control down into the shrinker callouts -
> that has come up before.  That would provide access to the scanning
> priority, as well as to anything else we want to toss in there in the future.

The scanned pages etc is available at the point that kmem_cache_defrag() 
is called. We can add logic to shrink_slab to determine if a defrag scan 
is necessary. We likely need to add a field to the zone that gives us the 
objects freed since the last defrag scan.

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Re: [patch 05/18] SLUB: Slab defrag core

[Christoph Lameter]

Here is a patch that gets rid of the timer and instead works with the 
fuzzy notion of the "objects" freed returned from the shrinkers. We add 
those up per node or globally and if they are greater than 100 we call 
into defrag.

Do we need to have an additional knob to set the level at which defrag 
triggers from reclaim? I just used 100.


Index: linux-2.6/include/linux/mmzone.h
===================================================================
--- linux-2.6.orig/include/linux/mmzone.h	2008-04-10 11:06:52.000000000 -0700
+++ linux-2.6/include/linux/mmzone.h	2008-04-10 11:08:04.000000000 -0700
@@ -263,6 +263,7 @@
 	unsigned long		nr_scan_active;
 	unsigned long		nr_scan_inactive;
 	unsigned long		pages_scanned;	   /* since last reclaim */
+	unsigned long		slab_objects_freed; /* Since last slab defrag */
 	unsigned long		flags;		   /* zone flags, see below */
 
 	/* Zone statistics */
Index: linux-2.6/include/linux/slub_def.h
===================================================================
--- linux-2.6.orig/include/linux/slub_def.h	2008-04-10 11:06:52.000000000 -0700
+++ linux-2.6/include/linux/slub_def.h	2008-04-10 11:08:04.000000000 -0700
@@ -91,7 +91,6 @@
 	struct kmem_cache_order_objects min;
 	gfp_t allocflags;	/* gfp flags to use on each alloc */
 	int refcount;		/* Refcount for slab cache destroy */
-	unsigned long next_defrag;
 	void (*ctor)(struct kmem_cache *, void *);
 	/*
 	 * Called with slab lock held and interrupts disabled.
Index: linux-2.6/mm/slub.c
===================================================================
--- linux-2.6.orig/mm/slub.c	2008-04-10 11:06:52.000000000 -0700
+++ linux-2.6/mm/slub.c	2008-04-10 11:08:04.000000000 -0700
@@ -2985,9 +2985,6 @@
 
 	list_for_each_entry(s, &slab_caches, list) {
 
-		if (time_before(jiffies, s->next_defrag))
-			continue;
-
 		/*
 		 * Defragmentable caches come first. If the slab cache is not
 		 * defragmentable then we can stop traversing the list.
@@ -3004,11 +3001,6 @@
 		} else
 			reclaimed = __kmem_cache_shrink(s, node, MAX_PARTIAL);
 
-		if (reclaimed)
-			s->next_defrag = jiffies + HZ / 10;
-		else
-			s->next_defrag = jiffies + HZ;
-
 		slabs += reclaimed;
 	}
 	up_read(&slub_lock);
Index: linux-2.6/mm/vmscan.c
===================================================================
--- linux-2.6.orig/mm/vmscan.c	2008-04-10 11:06:52.000000000 -0700
+++ linux-2.6/mm/vmscan.c	2008-04-10 11:24:02.000000000 -0700
@@ -234,8 +234,34 @@
 		shrinker->nr += total_scan;
 	}
 	up_read(&shrinker_rwsem);
-	if (ret && (gfp_mask & __GFP_FS))
-		kmem_cache_defrag(zone ? zone_to_nid(zone) : -1);
+
+	/*
+	 * "ret" doesnt really contain the freed object count. The shrinkers
+	 * fake it. Gotta go with what we are getting though.
+	 *
+	 * Handling of the freed object counter is also racy. If we get the
+	 * wrong counts then we may unnecessarily do a defrag pass or defer
+	 * one. "ret" is already faked. So this is just increasing
+	 * the already existing fuzziness to get some notion as to when
+	 * to initiate slab defrag which will hopefully be okay.
+	 */
+	if (zone) {
+		/* balance_pgdat running on a zone so we only scan one node */
+		zone->slab_objects_freed += ret;
+		if (zone->slab_objects_freed > 100 && (gfp_mask & __GFP_FS)) {
+			zone->slab_objects_freed = 0;
+			kmem_cache_defrag(zone_to_nid(zone));
+		}
+	} else {
+		static unsigned long global_objects_freed = 0;
+
+		/* Direct (and thus global) reclaim. Scan all nodes */
+		global_objects_freed += ret;
+		if (global_objects_freed > 100 && (gfp_mask & __GFP_FS)) {
+			global_objects_freed = 0;
+			kmem_cache_defrag(-1);
+		}
+	}
 	return ret;
 }
 

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Re: [patch 05/18] SLUB: Slab defrag core

[Andrew Morton]

On Thu, 10 Apr 2008 11:28:35 -0700 (PDT)
Christoph Lameter <clameter@sgi.com> wrote:

> Here is a patch that gets rid of the timer and instead works with the 
> fuzzy notion of the "objects" freed returned from the shrinkers. We add 
> those up per node or globally and if they are greater than 100 we call 
> into defrag.
> 
> Do we need to have an additional knob to set the level at which defrag 
> triggers from reclaim? I just used 100.

It's just for batching purposes, no?  My (dated) experience is that
batching of soemthing as large as 100x makes a tremendous efficiency
difference and that we'll never need to think about this again.  So subject
to suitable performance testing I'd say let it be.

> +
> +	/*
> +	 * "ret" doesnt really contain the freed object count. The shrinkers
> +	 * fake it. Gotta go with what we are getting though.
> +	 *
> +	 * Handling of the freed object counter is also racy. If we get the
> +	 * wrong counts then we may unnecessarily do a defrag pass or defer
> +	 * one. "ret" is already faked. So this is just increasing
> +	 * the already existing fuzziness to get some notion as to when
> +	 * to initiate slab defrag which will hopefully be okay.
> +	 */
> +	if (zone) {
> +		/* balance_pgdat running on a zone so we only scan one node */
> +		zone->slab_objects_freed += ret;
> +		if (zone->slab_objects_freed > 100 && (gfp_mask & __GFP_FS)) {
> +			zone->slab_objects_freed = 0;
> +			kmem_cache_defrag(zone_to_nid(zone));
> +		}
> +	} else {
> +		static unsigned long global_objects_freed = 0;

Wanna buy a patch-checking script?  It's real cheap!

> +		/* Direct (and thus global) reclaim. Scan all nodes */
> +		global_objects_freed += ret;
> +		if (global_objects_freed > 100 && (gfp_mask & __GFP_FS)) {

I guess overflow here are rather improbable - It would be somewhat odd if
we freed >4G objects in a row with !__GFP_FS.

> +			global_objects_freed = 0;
> +			kmem_cache_defrag(-1);
> +		}
> +	}
>  	return ret;
>  }
>  

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Re: [patch 05/18] SLUB: Slab defrag core

[Christoph Lameter]

On Thu, 10 Apr 2008, Andrew Morton wrote:

> > +		static unsigned long global_objects_freed = 0;
> 
> Wanna buy a patch-checking script?  It's real cheap!

Its a strange variable definition that people should pay 
attention to. = 0 would at least make me notice instead of just assuming
its just another of those local variables.

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Re: [patch 05/18] SLUB: Slab defrag core

[Pekka Enberg]

On Thu, 10 Apr 2008, Andrew Morton wrote:
>>> +		static unsigned long global_objects_freed = 0;
>> Wanna buy a patch-checking script?  It's real cheap!

Christoph Lameter wrote:
> Its a strange variable definition that people should pay 
> attention to. = 0 would at least make me notice instead of just assuming
> its just another of those local variables.

I would assume Andrew was referring to the strange variable definition 
and not the unnecessary initialization ;-)

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Re: [patch 09/18] SLUB: Trigger defragmentation from memory reclaim

[Christoph Lameter]

On Mon, 7 Apr 2008, Andrew Morton wrote:

> > + * zone is the zone for which we are shrinking the slabs. If the intent
> > + * is to do a global shrink then zone may be NULL. Specification of a
> > + * zone is currently only used to limit slab defragmentation to a NUMA node.
> > + * The performace of shrink_slab would be better (in particular under NUMA)
> > + * if it could be targeted as a whole to the zone that is under memory
> > + * pressure but the VFS infrastructure does not allow that at the present
> > + * time.
> 
> Surely this will falsely trigger the ->next_defrag logic?

slab reclaim is run rarely so I thought that these races do not matter 
much.

We could put that next_defrag logic into the per node structure 
and protect it by taking the partial list lock if we wanted to be race 
safe.

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Re: [patch 17/18] dentries: Add constructor

[Christoph Lameter]

On Mon, 7 Apr 2008, Andrew Morton wrote:

> On Fri, 04 Apr 2008 16:02:15 -0700 Christoph Lameter <clameter@sgi.com> wrote:
> 
> > In order to support defragmentation on the dentry cache we need to have
> > a determined object state at all times.
> 
> Oh.  I don't recall seeing any previous changelog text or code comments
> which told us this, and which explained why?
> 
> I might have missed it.

There is prior docs and the code checks for the presence of a ctor 
for any defragmentable slab.

> > +void dcache_ctor(struct kmem_cache *s, void *p)
> > +{
> > +	struct dentry *dentry = p;
> > +
> > +	spin_lock_init(&dentry->d_lock);
> > +	dentry->d_inode = NULL;
> > +	INIT_LIST_HEAD(&dentry->d_lru);
> > +	INIT_LIST_HEAD(&dentry->d_alias);
> > +}
> 
> I don't think this needed global scope?

Correct.

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Re: [patch 18/18] dentries: dentry defragmentation

[Christoph Lameter]

On Mon, 7 Apr 2008, Andrew Morton wrote:

> > +		dentry = v[i];
> > +
> > +		if (dentry)
> > +			d_invalidate(dentry);
> > +	}
> 
> So ->kick can be passed a v[] which has NULLs in it, whereas ->get does
> not.  How come?

->get() may see that we cannot reclaim an entity because its going away. 
Then we zap the pointer. Described in the core docs.

> 
> > +	/*
> > +	 * If we are the last one holding a reference then the dentries can
> > +	 * be freed. We need the dcache_lock.
> > +	 */
> > +	spin_lock(&dcache_lock);
> 
> hrm.   What is a tyical value of `nr' here?

Number of dentries in a page. 19.

> > +	spin_unlock(&dcache_lock);
> 
> Do we know what the typical success rate is of the above code?

About 60-70% of slab pages are successfully reclaimed (updatedb). 
Percentage increases if more memory is used by caches dentries.
 
> More importantly - what is the worst success rate, and under which
> circumstances will it occur, and what are the consequences?

If just dentries remain that are pinned then the function 
will not succeed and the slab page will be marked unkickable and no longer 
scanned.

> > +	 * operations are complete
> > +	 */
> > +	synchronize_rcu();
> 
> Do we?  Why?

dentries must be removed by RCU. We cannot free the page before the RCU 
period has expired.

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Re: [patch 18/18] dentries: dentry defragmentation

[Andrew Morton]

On Tue, 8 Apr 2008 14:14:33 -0700 (PDT) Christoph Lameter <clameter@sgi.com> wrote:

> > More importantly - what is the worst success rate, and under which
> > circumstances will it occur, and what are the consequences?
> 
> If just dentries remain that are pinned then the function 
> will not succeed and the slab page will be marked unkickable and no longer 
> scanned.

That doesn't address my overall concern here.

We know from hard experience that scanning code tends to have failure
scenarios where it expends large amounts of CPU time not achieving much.

What workloads are most likely to trigger that sort of behaviour with these
changes?  How do we establish such failure scenarios and test them?

It could be that the non-kickable flag saves us from all such cases, dunno.

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Re: [patch 18/18] dentries: dentry defragmentation

[Christoph Lameter]

On Tue, 8 Apr 2008, Andrew Morton wrote:

> We know from hard experience that scanning code tends to have failure
> scenarios where it expends large amounts of CPU time not achieving much.

That is prevented by marking slabs where we were unable to reclaim all 
objects in a special way. Those are exempt from future scans. Another 
reclaim attempt is made on these slabs only after all objects have been 
allocated from a slab.

So the worst case would be:

1. Removal of one object from a slab

2. Reclaim scan fails. Page marked unkickable

3. We allocate the last object. Page marked kickable.

4. goto 1


Note that it is difficult to get below the slab defrag ratio (20%) to 
trigger this. I guess a slab with 5 objects could get there if 4 objects
have been freed.

If one increases the ratio to 60% then one would be able to do that with a 
slab cache that has only 2 objects. Boot with slab_max_order=0 to force 
mininum objects per slab.
 
> What workloads are most likely to trigger that sort of behaviour with these
> changes?  How do we establish such failure scenarios and test them?
> 
> It could be that the non-kickable flag saves us from all such cases, dunno.

The kickable flag exempts slabs from attempt to reclaim but it does not 
take the slab off the partial. If we have a large amount of partial slabs 
then scanning the partials may become expensive. That is why I added the 
timeout to reduce the scans in V11.

If we want to get rid of the timeout then we should key the reclaim 
frequency off the number of objects freed since last reclaim and also 
consider the size of the partial slab list. The larger the partial slab 
list the rarer the scan. slabinfo will show the size of the partial lists. 
Also slabinfo provides counters to verify the operation of slab reclaim.



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RIP __kmem_cache_shrink (was Re: [patch 15/18] FS: Proc filesystem support for slab defrag)

[Alexey Dobriyan]

On Mon, Apr 07, 2008 at 11:13:46PM -0700, Andrew Morton wrote:
> > Support procfs inode defragmentation

I got this every time at boot

	[scrolled off]
kmem_cache_shrink
acpi_os_purge_cache
acpi_purge_cached_objects
acpi_initialize_objects
acpi_init
? blk_dev_init
? genhd_device_init
kernel_init
? _spin_unlock_irq
? trace_hardirqs_on_thunk
? trace_hardirqs_on
child_rip
? restore_args
? kernel_init
? shild_rip

RIP: __kmem_cache_shrink+0x1b9/0x1d0

Oopsing place is BUG_ON at __bit_spin_unlock().
Defrag patchset corresponds to commit 534cf5c315a... aka
"dentries: dentry defragmentation"

#
# Automatically generated make config: don't edit
# Linux kernel version: 2.6.25-rc8
# Sun Apr 13 17:27:39 2008
#
CONFIG_64BIT=y
# CONFIG_X86_32 is not set
CONFIG_X86_64=y
CONFIG_X86=y
# CONFIG_GENERIC_LOCKBREAK is not set
CONFIG_GENERIC_TIME=y
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_SEMAPHORE_SLEEPERS=y
CONFIG_FAST_CMPXCHG_LOCAL=y
CONFIG_MMU=y
CONFIG_ZONE_DMA=y
CONFIG_GENERIC_ISA_DMA=y
CONFIG_GENERIC_IOMAP=y
CONFIG_GENERIC_BUG=y
CONFIG_GENERIC_HWEIGHT=y
# CONFIG_GENERIC_GPIO is not set
CONFIG_ARCH_MAY_HAVE_PC_FDC=y
CONFIG_DMI=y
CONFIG_RWSEM_GENERIC_SPINLOCK=y
# CONFIG_RWSEM_XCHGADD_ALGORITHM is not set
# CONFIG_ARCH_HAS_ILOG2_U32 is not set
# CONFIG_ARCH_HAS_ILOG2_U64 is not set
CONFIG_ARCH_HAS_CPU_IDLE_WAIT=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
CONFIG_GENERIC_TIME_VSYSCALL=y
CONFIG_ARCH_HAS_CPU_RELAX=y
CONFIG_HAVE_SETUP_PER_CPU_AREA=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_AOUT=y
CONFIG_GENERIC_HARDIRQS=y
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_GENERIC_PENDING_IRQ=y
CONFIG_X86_SMP=y
CONFIG_X86_64_SMP=y
CONFIG_X86_HT=y
CONFIG_X86_TRAMPOLINE=y
# CONFIG_KTIME_SCALAR is not set
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"

#
# General setup
#
CONFIG_EXPERIMENTAL=y
CONFIG_LOCK_KERNEL=y
CONFIG_INIT_ENV_ARG_LIMIT=32
CONFIG_LOCALVERSION="-defrag"
# CONFIG_LOCALVERSION_AUTO is not set
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SYSCTL=y
# CONFIG_POSIX_MQUEUE is not set
# CONFIG_BSD_PROCESS_ACCT is not set
# CONFIG_TASKSTATS is not set
# CONFIG_AUDIT is not set
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_LOG_BUF_SHIFT=17
# CONFIG_CGROUPS is not set
# CONFIG_GROUP_SCHED is not set
CONFIG_SYSFS_DEPRECATED=y
CONFIG_SYSFS_DEPRECATED_V2=y
# CONFIG_RELAY is not set
# CONFIG_NAMESPACES is not set
# CONFIG_BLK_DEV_INITRD is not set
# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
CONFIG_SYSCTL=y
CONFIG_EMBEDDED=y
# CONFIG_UID16 is not set
# CONFIG_SYSCTL_SYSCALL is not set
CONFIG_KALLSYMS=y
CONFIG_KALLSYMS_ALL=y
# CONFIG_KALLSYMS_EXTRA_PASS is not set
CONFIG_HOTPLUG=y
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
# CONFIG_COMPAT_BRK is not set
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
# CONFIG_EPOLL is not set
# CONFIG_SIGNALFD is not set
# CONFIG_TIMERFD is not set
# CONFIG_EVENTFD is not set
CONFIG_SHMEM=y
# CONFIG_VM_EVENT_COUNTERS is not set
CONFIG_SLUB_DEBUG=y
# CONFIG_SLAB is not set
CONFIG_SLUB=y
# CONFIG_SLOB is not set
# CONFIG_PROFILING is not set
# CONFIG_MARKERS is not set
CONFIG_HAVE_OPROFILE=y
# CONFIG_KPROBES is not set
CONFIG_HAVE_KPROBES=y
CONFIG_HAVE_KRETPROBES=y
# CONFIG_PROC_PAGE_MONITOR is not set
CONFIG_SLABINFO=y
CONFIG_RT_MUTEXES=y
# CONFIG_TINY_SHMEM is not set
CONFIG_BASE_SMALL=0
CONFIG_MODULES=y
CONFIG_MODULE_UNLOAD=y
# CONFIG_MODULE_FORCE_UNLOAD is not set
# CONFIG_MODVERSIONS is not set
# CONFIG_MODULE_SRCVERSION_ALL is not set
CONFIG_KMOD=y
CONFIG_STOP_MACHINE=y
CONFIG_BLOCK=y
# CONFIG_BLK_DEV_IO_TRACE is not set
# CONFIG_BLK_DEV_BSG is not set
CONFIG_BLOCK_COMPAT=y

#
# IO Schedulers
#
CONFIG_IOSCHED_NOOP=y
# CONFIG_IOSCHED_AS is not set
# CONFIG_IOSCHED_DEADLINE is not set
CONFIG_IOSCHED_CFQ=y
# CONFIG_DEFAULT_AS is not set
# CONFIG_DEFAULT_DEADLINE is not set
CONFIG_DEFAULT_CFQ=y
# CONFIG_DEFAULT_NOOP is not set
CONFIG_DEFAULT_IOSCHED="cfq"
CONFIG_CLASSIC_RCU=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_PC=y
# CONFIG_X86_ELAN is not set
# CONFIG_X86_VOYAGER is not set
# CONFIG_X86_NUMAQ is not set
# CONFIG_X86_SUMMIT is not set
# CONFIG_X86_BIGSMP is not set
# CONFIG_X86_VISWS is not set
# CONFIG_X86_GENERICARCH is not set
# CONFIG_X86_ES7000 is not set
# CONFIG_X86_RDC321X is not set
# CONFIG_X86_VSMP is not set
# CONFIG_PARAVIRT_GUEST is not set
# CONFIG_M386 is not set
# CONFIG_M486 is not set
# CONFIG_M586 is not set
# CONFIG_M586TSC is not set
# CONFIG_M586MMX is not set
# CONFIG_M686 is not set
# CONFIG_MPENTIUMII is not set
# CONFIG_MPENTIUMIII is not set
# CONFIG_MPENTIUMM is not set
# CONFIG_MPENTIUM4 is not set
# CONFIG_MK6 is not set
# CONFIG_MK7 is not set
# CONFIG_MK8 is not set
# CONFIG_MCRUSOE is not set
# CONFIG_MEFFICEON is not set
# CONFIG_MWINCHIPC6 is not set
# CONFIG_MWINCHIP2 is not set
# CONFIG_MWINCHIP3D is not set
# CONFIG_MGEODEGX1 is not set
# CONFIG_MGEODE_LX is not set
# CONFIG_MCYRIXIII is not set
# CONFIG_MVIAC3_2 is not set
# CONFIG_MVIAC7 is not set
# CONFIG_MPSC is not set
CONFIG_MCORE2=y
# CONFIG_GENERIC_CPU is not set
CONFIG_X86_L1_CACHE_BYTES=64
CONFIG_X86_INTERNODE_CACHE_BYTES=64
CONFIG_X86_CMPXCHG=y
CONFIG_X86_L1_CACHE_SHIFT=6
CONFIG_X86_GOOD_APIC=y
CONFIG_X86_INTEL_USERCOPY=y
CONFIG_X86_USE_PPRO_CHECKSUM=y
CONFIG_X86_P6_NOP=y
CONFIG_X86_TSC=y
CONFIG_X86_MINIMUM_CPU_FAMILY=64
CONFIG_X86_DEBUGCTLMSR=y
CONFIG_HPET_TIMER=y
CONFIG_HPET_EMULATE_RTC=y
CONFIG_GART_IOMMU=y
# CONFIG_CALGARY_IOMMU is not set
CONFIG_IOMMU_HELPER=y
CONFIG_SWIOTLB=y
CONFIG_NR_CPUS=2
# CONFIG_SCHED_SMT is not set
# CONFIG_SCHED_MC is not set
CONFIG_PREEMPT_NONE=y
# CONFIG_PREEMPT_VOLUNTARY is not set
# CONFIG_PREEMPT is not set
CONFIG_X86_LOCAL_APIC=y
CONFIG_X86_IO_APIC=y
CONFIG_X86_MCE=y
CONFIG_X86_MCE_INTEL=y
# CONFIG_X86_MCE_AMD is not set
# CONFIG_I8K is not set
# CONFIG_MICROCODE is not set
# CONFIG_X86_MSR is not set
# CONFIG_X86_CPUID is not set
# CONFIG_NUMA is not set
CONFIG_ARCH_SPARSEMEM_DEFAULT=y
CONFIG_ARCH_SPARSEMEM_ENABLE=y
CONFIG_ARCH_SELECT_MEMORY_MODEL=y
CONFIG_SELECT_MEMORY_MODEL=y
# CONFIG_FLATMEM_MANUAL is not set
# CONFIG_DISCONTIGMEM_MANUAL is not set
CONFIG_SPARSEMEM_MANUAL=y
CONFIG_SPARSEMEM=y
CONFIG_HAVE_MEMORY_PRESENT=y
# CONFIG_SPARSEMEM_STATIC is not set
CONFIG_SPARSEMEM_EXTREME=y
CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y
CONFIG_SPARSEMEM_VMEMMAP=y
# CONFIG_MEMORY_HOTPLUG is not set
CONFIG_SPLIT_PTLOCK_CPUS=4
CONFIG_RESOURCES_64BIT=y
CONFIG_ZONE_DMA_FLAG=1
CONFIG_BOUNCE=y
CONFIG_VIRT_TO_BUS=y
CONFIG_MTRR=y
# CONFIG_EFI is not set
# CONFIG_SECCOMP is not set
CONFIG_HZ_100=y
# CONFIG_HZ_250 is not set
# CONFIG_HZ_300 is not set
# CONFIG_HZ_1000 is not set
CONFIG_HZ=100
CONFIG_SCHED_HRTICK=y
# CONFIG_KEXEC is not set
# CONFIG_CRASH_DUMP is not set
CONFIG_PHYSICAL_START=0x200000
# CONFIG_RELOCATABLE is not set
CONFIG_PHYSICAL_ALIGN=0x200000
# CONFIG_HOTPLUG_CPU is not set
# CONFIG_COMPAT_VDSO is not set
CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y

#
# Power management options
#
CONFIG_PM=y
# CONFIG_PM_LEGACY is not set
# CONFIG_PM_DEBUG is not set
# CONFIG_SUSPEND is not set
# CONFIG_HIBERNATION is not set
CONFIG_ACPI=y
# CONFIG_ACPI_PROCFS is not set
# CONFIG_ACPI_PROCFS_POWER is not set
# CONFIG_ACPI_SYSFS_POWER is not set
# CONFIG_ACPI_PROC_EVENT is not set
# CONFIG_ACPI_AC is not set
# CONFIG_ACPI_BATTERY is not set
# CONFIG_ACPI_BUTTON is not set
# CONFIG_ACPI_FAN is not set
CONFIG_ACPI_DOCK=y
# CONFIG_ACPI_BAY is not set
# CONFIG_ACPI_PROCESSOR is not set
# CONFIG_ACPI_WMI is not set
# CONFIG_ACPI_ASUS is not set
# CONFIG_ACPI_TOSHIBA is not set
# CONFIG_ACPI_CUSTOM_DSDT is not set
CONFIG_ACPI_BLACKLIST_YEAR=0
# CONFIG_ACPI_DEBUG is not set
CONFIG_ACPI_EC=y
CONFIG_ACPI_POWER=y
CONFIG_ACPI_SYSTEM=y
# CONFIG_X86_PM_TIMER is not set
# CONFIG_ACPI_CONTAINER is not set
# CONFIG_ACPI_SBS is not set

#
# CPU Frequency scaling
#
# CONFIG_CPU_FREQ is not set
# CONFIG_CPU_IDLE is not set

#
# Bus options (PCI etc.)
#
CONFIG_PCI=y
CONFIG_PCI_DIRECT=y
# CONFIG_PCI_MMCONFIG is not set
CONFIG_PCI_DOMAINS=y
# CONFIG_DMAR is not set
# CONFIG_PCIEPORTBUS is not set
CONFIG_ARCH_SUPPORTS_MSI=y
CONFIG_PCI_MSI=y
# CONFIG_PCI_LEGACY is not set
# CONFIG_PCI_DEBUG is not set
# CONFIG_HT_IRQ is not set
CONFIG_ISA_DMA_API=y
CONFIG_K8_NB=y
# CONFIG_PCCARD is not set
# CONFIG_HOTPLUG_PCI is not set

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

#
# Networking
#
CONFIG_NET=y

#
# Networking options
#
# CONFIG_PACKET is not set
CONFIG_UNIX=y
# CONFIG_NET_KEY is not set
CONFIG_INET=y
# CONFIG_IP_MULTICAST is not set
# CONFIG_IP_ADVANCED_ROUTER is not set
CONFIG_IP_FIB_HASH=y
# CONFIG_IP_PNP is not set
# CONFIG_NET_IPIP is not set
# CONFIG_NET_IPGRE 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 is not set
# CONFIG_INET_DIAG is not set
# CONFIG_TCP_CONG_ADVANCED is not set
CONFIG_TCP_CONG_CUBIC=y
CONFIG_DEFAULT_TCP_CONG="cubic"
# CONFIG_TCP_MD5SIG is not set
# CONFIG_IP_VS is not set
# CONFIG_IPV6 is not set
# CONFIG_INET6_XFRM_TUNNEL is not set
# CONFIG_INET6_TUNNEL is not set
# CONFIG_NETWORK_SECMARK is not set
CONFIG_NETFILTER=y
# CONFIG_NETFILTER_DEBUG is not set
CONFIG_NETFILTER_ADVANCED=y

#
# Core Netfilter Configuration
#
CONFIG_NETFILTER_NETLINK=m
# CONFIG_NETFILTER_NETLINK_QUEUE is not set
# CONFIG_NETFILTER_NETLINK_LOG is not set
CONFIG_NF_CONNTRACK=m
CONFIG_NF_CT_ACCT=y
CONFIG_NF_CONNTRACK_MARK=y
# CONFIG_NF_CONNTRACK_EVENTS is not set
CONFIG_NF_CT_PROTO_GRE=m
CONFIG_NF_CT_PROTO_SCTP=m
CONFIG_NF_CT_PROTO_UDPLITE=m
CONFIG_NF_CONNTRACK_AMANDA=m
CONFIG_NF_CONNTRACK_FTP=m
CONFIG_NF_CONNTRACK_H323=m
CONFIG_NF_CONNTRACK_IRC=m
CONFIG_NF_CONNTRACK_NETBIOS_NS=m
CONFIG_NF_CONNTRACK_PPTP=m
CONFIG_NF_CONNTRACK_SANE=m
CONFIG_NF_CONNTRACK_SIP=m
CONFIG_NF_CONNTRACK_TFTP=m
CONFIG_NF_CT_NETLINK=m
CONFIG_NETFILTER_XTABLES=m
CONFIG_NETFILTER_XT_TARGET_CLASSIFY=m
CONFIG_NETFILTER_XT_TARGET_CONNMARK=m
CONFIG_NETFILTER_XT_TARGET_DSCP=m
CONFIG_NETFILTER_XT_TARGET_MARK=m
CONFIG_NETFILTER_XT_TARGET_NFQUEUE=m
CONFIG_NETFILTER_XT_TARGET_NFLOG=m
CONFIG_NETFILTER_XT_TARGET_NOTRACK=m
CONFIG_NETFILTER_XT_TARGET_RATEEST=m
CONFIG_NETFILTER_XT_TARGET_TRACE=m
CONFIG_NETFILTER_XT_TARGET_TCPMSS=m
CONFIG_NETFILTER_XT_TARGET_TCPOPTSTRIP=m
CONFIG_NETFILTER_XT_MATCH_COMMENT=m
CONFIG_NETFILTER_XT_MATCH_CONNBYTES=m
CONFIG_NETFILTER_XT_MATCH_CONNLIMIT=m
CONFIG_NETFILTER_XT_MATCH_CONNMARK=m
CONFIG_NETFILTER_XT_MATCH_CONNTRACK=m
CONFIG_NETFILTER_XT_MATCH_DCCP=m
CONFIG_NETFILTER_XT_MATCH_DSCP=m
CONFIG_NETFILTER_XT_MATCH_ESP=m
CONFIG_NETFILTER_XT_MATCH_HELPER=m
CONFIG_NETFILTER_XT_MATCH_IPRANGE=m
CONFIG_NETFILTER_XT_MATCH_LENGTH=m
CONFIG_NETFILTER_XT_MATCH_LIMIT=m
CONFIG_NETFILTER_XT_MATCH_MAC=m
CONFIG_NETFILTER_XT_MATCH_MARK=m
CONFIG_NETFILTER_XT_MATCH_OWNER=m
CONFIG_NETFILTER_XT_MATCH_MULTIPORT=m
CONFIG_NETFILTER_XT_MATCH_PKTTYPE=m
CONFIG_NETFILTER_XT_MATCH_QUOTA=m
CONFIG_NETFILTER_XT_MATCH_RATEEST=m
CONFIG_NETFILTER_XT_MATCH_REALM=m
CONFIG_NETFILTER_XT_MATCH_SCTP=m
CONFIG_NETFILTER_XT_MATCH_STATE=m
CONFIG_NETFILTER_XT_MATCH_STATISTIC=m
CONFIG_NETFILTER_XT_MATCH_STRING=m
CONFIG_NETFILTER_XT_MATCH_TCPMSS=m
CONFIG_NETFILTER_XT_MATCH_TIME=m
CONFIG_NETFILTER_XT_MATCH_U32=m
CONFIG_NETFILTER_XT_MATCH_HASHLIMIT=m

#
# IP: Netfilter Configuration
#
CONFIG_NF_CONNTRACK_IPV4=m
CONFIG_NF_CONNTRACK_PROC_COMPAT=y
CONFIG_IP_NF_QUEUE=m
CONFIG_IP_NF_IPTABLES=m
CONFIG_IP_NF_MATCH_RECENT=m
CONFIG_IP_NF_MATCH_ECN=m
CONFIG_IP_NF_MATCH_AH=m
CONFIG_IP_NF_MATCH_TTL=m
CONFIG_IP_NF_MATCH_ADDRTYPE=m
CONFIG_IP_NF_FILTER=m
CONFIG_IP_NF_TARGET_REJECT=m
CONFIG_IP_NF_TARGET_LOG=m
CONFIG_IP_NF_TARGET_ULOG=m
CONFIG_NF_NAT=m
CONFIG_NF_NAT_NEEDED=y
CONFIG_IP_NF_TARGET_MASQUERADE=m
CONFIG_IP_NF_TARGET_REDIRECT=m
CONFIG_IP_NF_TARGET_NETMAP=m
CONFIG_NF_NAT_SNMP_BASIC=m
CONFIG_NF_NAT_PROTO_GRE=m
CONFIG_NF_NAT_FTP=m
CONFIG_NF_NAT_IRC=m
CONFIG_NF_NAT_TFTP=m
CONFIG_NF_NAT_AMANDA=m
CONFIG_NF_NAT_PPTP=m
CONFIG_NF_NAT_H323=m
CONFIG_NF_NAT_SIP=m
CONFIG_IP_NF_MANGLE=m
CONFIG_IP_NF_TARGET_ECN=m
CONFIG_IP_NF_TARGET_TTL=m
CONFIG_IP_NF_TARGET_CLUSTERIP=m
CONFIG_IP_NF_RAW=m
CONFIG_IP_NF_ARPTABLES=m
CONFIG_IP_NF_ARPFILTER=m
CONFIG_IP_NF_ARP_MANGLE=m
# CONFIG_IP_DCCP is not set
# CONFIG_IP_SCTP is not set
# CONFIG_TIPC is not set
# CONFIG_ATM is not set
# CONFIG_BRIDGE 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_NET_SCHED is not set
CONFIG_NET_CLS_ROUTE=y

#
# 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

#
# Wireless
#
# CONFIG_CFG80211 is not set
# CONFIG_WIRELESS_EXT is not set
# CONFIG_MAC80211 is not set
# CONFIG_IEEE80211 is not set
# CONFIG_RFKILL is not set
# CONFIG_NET_9P is not set

#
# Device Drivers
#

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

#
# Protocols
#
CONFIG_PNPACPI=y
# CONFIG_BLK_DEV is not set
# CONFIG_MISC_DEVICES is not set
CONFIG_HAVE_IDE=y
# CONFIG_IDE is not set

#
# SCSI device support
#
# 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 is not set

#
# 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=m
# CONFIG_BLK_DEV_SR_VENDOR is not set
# CONFIG_CHR_DEV_SG is not set
# CONFIG_CHR_DEV_SCH is not set

#
# Some SCSI devices (e.g. CD jukebox) support multiple LUNs
#
# CONFIG_SCSI_MULTI_LUN is not set
# CONFIG_SCSI_CONSTANTS is not set
# 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_LIBSAS is not set
# CONFIG_SCSI_SRP_ATTRS is not set
# CONFIG_SCSI_LOWLEVEL is not set
CONFIG_ATA=y
# CONFIG_ATA_NONSTANDARD is not set
CONFIG_ATA_ACPI=y
CONFIG_SATA_AHCI=y
# CONFIG_SATA_SVW is not set
CONFIG_ATA_PIIX=y
# CONFIG_SATA_MV is not set
# CONFIG_SATA_NV is not set
# CONFIG_PDC_ADMA is not set
# CONFIG_SATA_QSTOR is not set
# CONFIG_SATA_PROMISE is not set
# CONFIG_SATA_SX4 is not set
# CONFIG_SATA_SIL is not set
# CONFIG_SATA_SIL24 is not set
# CONFIG_SATA_SIS is not set
# CONFIG_SATA_ULI is not set
# CONFIG_SATA_VIA is not set
# CONFIG_SATA_VITESSE is not set
# CONFIG_SATA_INIC162X is not set
# CONFIG_PATA_ACPI is not set
# CONFIG_PATA_ALI is not set
# CONFIG_PATA_AMD is not set
# CONFIG_PATA_ARTOP is not set
# CONFIG_PATA_ATIIXP is not set
# CONFIG_PATA_CMD640_PCI is not set
# CONFIG_PATA_CMD64X is not set
# CONFIG_PATA_CS5520 is not set
# CONFIG_PATA_CS5530 is not set
# CONFIG_PATA_CYPRESS is not set
# CONFIG_PATA_EFAR is not set
# CONFIG_ATA_GENERIC 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_IT821X is not set
# CONFIG_PATA_IT8213 is not set
CONFIG_PATA_JMICRON=y
# CONFIG_PATA_TRIFLEX is not set
# CONFIG_PATA_MARVELL is not set
# CONFIG_PATA_MPIIX is not set
# CONFIG_PATA_OLDPIIX is not set
# CONFIG_PATA_NETCELL is not set
# CONFIG_PATA_NINJA32 is not set
# CONFIG_PATA_NS87410 is not set
# CONFIG_PATA_NS87415 is not set
# CONFIG_PATA_OPTI is not set
# CONFIG_PATA_OPTIDMA is not set
# CONFIG_PATA_PDC_OLD is not set
# CONFIG_PATA_RADISYS is not set
# CONFIG_PATA_RZ1000 is not set
# CONFIG_PATA_SC1200 is not set
# CONFIG_PATA_SERVERWORKS is not set
# CONFIG_PATA_PDC2027X is not set
# CONFIG_PATA_SIL680 is not set
# CONFIG_PATA_SIS is not set
# CONFIG_PATA_VIA is not set
# CONFIG_PATA_WINBOND is not set
# CONFIG_PATA_PLATFORM is not set
# CONFIG_MD is not set
# CONFIG_FUSION is not set

#
# IEEE 1394 (FireWire) support
#
# CONFIG_FIREWIRE is not set
# CONFIG_IEEE1394 is not set
# CONFIG_I2O is not set
# CONFIG_MACINTOSH_DRIVERS is not set
CONFIG_NETDEVICES=y
# CONFIG_NETDEVICES_MULTIQUEUE is not set
# CONFIG_DUMMY is not set
# CONFIG_BONDING is not set
# CONFIG_MACVLAN is not set
# CONFIG_EQUALIZER is not set
# CONFIG_TUN is not set
# CONFIG_VETH is not set
# CONFIG_NET_SB1000 is not set
# CONFIG_ARCNET is not set
# CONFIG_PHYLIB is not set
CONFIG_NET_ETHERNET=y
CONFIG_MII=y
# CONFIG_HAPPYMEAL is not set
# CONFIG_SUNGEM is not set
# CONFIG_CASSINI is not set
# CONFIG_NET_VENDOR_3COM is not set
# CONFIG_NET_TULIP is not set
# CONFIG_HP100 is not set
# CONFIG_IBM_NEW_EMAC_ZMII is not set
# CONFIG_IBM_NEW_EMAC_RGMII is not set
# CONFIG_IBM_NEW_EMAC_TAH is not set
# CONFIG_IBM_NEW_EMAC_EMAC4 is not set
CONFIG_NET_PCI=y
# CONFIG_PCNET32 is not set
# CONFIG_AMD8111_ETH is not set
# CONFIG_ADAPTEC_STARFIRE is not set
# CONFIG_B44 is not set
# CONFIG_FORCEDETH is not set
# CONFIG_EEPRO100 is not set
# CONFIG_E100 is not set
# CONFIG_FEALNX is not set
# CONFIG_NATSEMI is not set
# CONFIG_NE2K_PCI is not set
# CONFIG_8139CP is not set
CONFIG_8139TOO=y
CONFIG_8139TOO_PIO=y
# CONFIG_8139TOO_TUNE_TWISTER is not set
# CONFIG_8139TOO_8129 is not set
# CONFIG_8139_OLD_RX_RESET is not set
# CONFIG_R6040 is not set
# CONFIG_SIS900 is not set
# CONFIG_EPIC100 is not set
# CONFIG_SUNDANCE is not set
# CONFIG_VIA_RHINE is not set
# CONFIG_SC92031 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_E1000E_ENABLED is not set
# CONFIG_IP1000 is not set
# CONFIG_IGB 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_SK98LIN is not set
# CONFIG_VIA_VELOCITY is not set
# CONFIG_TIGON3 is not set
# CONFIG_BNX2 is not set
# CONFIG_QLA3XXX is not set
CONFIG_ATL1=y
# CONFIG_NETDEV_10000 is not set
# CONFIG_TR is not set

#
# Wireless LAN
#
# CONFIG_WLAN_PRE80211 is not set
# CONFIG_WLAN_80211 is not set

#
# 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 is not set
# CONFIG_WAN is not set
# CONFIG_FDDI is not set
# CONFIG_HIPPI is not set
# CONFIG_PPP is not set
# CONFIG_SLIP is not set
# CONFIG_NET_FC is not set
CONFIG_NETCONSOLE=y
# CONFIG_NETCONSOLE_DYNAMIC is not set
CONFIG_NETPOLL=y
# CONFIG_NETPOLL_TRAP is not set
CONFIG_NET_POLL_CONTROLLER=y
# 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 is not set

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

#
# Input Device Drivers
#
CONFIG_INPUT_KEYBOARD=y
CONFIG_KEYBOARD_ATKBD=y
# CONFIG_KEYBOARD_SUNKBD is not set
# CONFIG_KEYBOARD_LKKBD is not set
# CONFIG_KEYBOARD_XTKBD is not set
# CONFIG_KEYBOARD_NEWTON is not set
# CONFIG_KEYBOARD_STOWAWAY is not set
# CONFIG_INPUT_MOUSE is not set
# CONFIG_INPUT_JOYSTICK is not set
# CONFIG_INPUT_TABLET is not set
# CONFIG_INPUT_TOUCHSCREEN is not set
# CONFIG_INPUT_MISC is not set

#
# Hardware I/O ports
#
CONFIG_SERIO=y
CONFIG_SERIO_I8042=y
# CONFIG_SERIO_SERPORT is not set
# CONFIG_SERIO_CT82C710 is not set
# CONFIG_SERIO_PCIPS2 is not set
CONFIG_SERIO_LIBPS2=y
# CONFIG_SERIO_RAW is not set
# CONFIG_GAMEPORT is not set

#
# Character devices
#
CONFIG_VT=y
CONFIG_VT_CONSOLE=y
CONFIG_HW_CONSOLE=y
# CONFIG_VT_HW_CONSOLE_BINDING is not set
# CONFIG_SERIAL_NONSTANDARD is not set
# CONFIG_NOZOMI is not set

#
# Serial drivers
#
# CONFIG_SERIAL_8250 is not set
CONFIG_FIX_EARLYCON_MEM=y

#
# Non-8250 serial port support
#
# CONFIG_SERIAL_JSM is not set
CONFIG_UNIX98_PTYS=y
# CONFIG_LEGACY_PTYS is not set
# CONFIG_IPMI_HANDLER is not set
# CONFIG_HW_RANDOM is not set
# CONFIG_NVRAM is not set
CONFIG_RTC=y
# CONFIG_R3964 is not set
# CONFIG_APPLICOM is not set
# CONFIG_MWAVE is not set
# CONFIG_PC8736x_GPIO is not set
# CONFIG_RAW_DRIVER is not set
# CONFIG_HPET is not set
# CONFIG_HANGCHECK_TIMER is not set
# CONFIG_TCG_TPM is not set
# CONFIG_TELCLOCK is not set
CONFIG_DEVPORT=y
# CONFIG_I2C is not set

#
# SPI support
#
# CONFIG_SPI is not set
# CONFIG_SPI_MASTER is not set
# CONFIG_W1 is not set
# CONFIG_POWER_SUPPLY is not set
# CONFIG_HWMON is not set
# CONFIG_THERMAL is not set
# CONFIG_WATCHDOG is not set

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

#
# Multifunction device drivers
#
# CONFIG_MFD_SM501 is not set

#
# Multimedia devices
#
# CONFIG_VIDEO_DEV is not set
# CONFIG_DVB_CORE is not set
# CONFIG_DAB is not set

#
# Graphics support
#
CONFIG_AGP=y
CONFIG_AGP_AMD64=y
# CONFIG_AGP_INTEL is not set
# CONFIG_AGP_SIS is not set
# CONFIG_AGP_VIA is not set
# CONFIG_DRM is not set
# CONFIG_VGASTATE is not set
# CONFIG_VIDEO_OUTPUT_CONTROL is not set
# CONFIG_FB is not set
# CONFIG_BACKLIGHT_LCD_SUPPORT is not set

#
# Display device support
#
# CONFIG_DISPLAY_SUPPORT is not set

#
# Console display driver support
#
CONFIG_VGA_CONSOLE=y
# CONFIG_VGACON_SOFT_SCROLLBACK is not set
# CONFIG_VIDEO_SELECT is not set
CONFIG_DUMMY_CONSOLE=y

#
# Sound
#
CONFIG_SOUND=y

#
# Advanced Linux Sound Architecture
#
CONFIG_SND=y
CONFIG_SND_TIMER=y
CONFIG_SND_PCM=y
CONFIG_SND_RAWMIDI=m
CONFIG_SND_SEQUENCER=y
CONFIG_SND_SEQ_DUMMY=y
CONFIG_SND_OSSEMUL=y
CONFIG_SND_MIXER_OSS=y
CONFIG_SND_PCM_OSS=y
CONFIG_SND_PCM_OSS_PLUGINS=y
CONFIG_SND_SEQUENCER_OSS=y
CONFIG_SND_RTCTIMER=y
CONFIG_SND_SEQ_RTCTIMER_DEFAULT=y
CONFIG_SND_DYNAMIC_MINORS=y
CONFIG_SND_SUPPORT_OLD_API=y
CONFIG_SND_VERBOSE_PROCFS=y
# CONFIG_SND_VERBOSE_PRINTK is not set
# CONFIG_SND_DEBUG is not set

#
# Generic devices
#
CONFIG_SND_MPU401_UART=m
# CONFIG_SND_DUMMY 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=m

#
# PCI devices
#
# 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_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_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_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_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=y
# CONFIG_SND_HDA_HWDEP 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_ATIHDMI=y
CONFIG_SND_HDA_CODEC_CONEXANT=y
CONFIG_SND_HDA_CODEC_CMEDIA=y
CONFIG_SND_HDA_CODEC_SI3054=y
CONFIG_SND_HDA_GENERIC=y
CONFIG_SND_HDA_POWER_SAVE=y
CONFIG_SND_HDA_POWER_SAVE_DEFAULT=0
# CONFIG_SND_HDSP is not set
# CONFIG_SND_HDSPM is not set
# CONFIG_SND_HIFIER is not set
# CONFIG_SND_ICE1712 is not set
# CONFIG_SND_ICE1724 is not set
# CONFIG_SND_INTEL8X0 is not set
# CONFIG_SND_INTEL8X0M is not set
# CONFIG_SND_KORG1212 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

#
# USB devices
#
# CONFIG_SND_USB_AUDIO is not set
# CONFIG_SND_USB_USX2Y is not set
# CONFIG_SND_USB_CAIAQ is not set

#
# System on Chip audio support
#
# CONFIG_SND_SOC is not set

#
# SoC Audio support for SuperH
#

#
# ALSA SoC audio for Freescale SOCs
#

#
# Open Sound System
#
# CONFIG_SOUND_PRIME is not set
CONFIG_HID_SUPPORT=y
CONFIG_HID=y
# CONFIG_HID_DEBUG is not set
# CONFIG_HIDRAW is not set

#
# USB Input Devices
#
CONFIG_USB_HID=m
# CONFIG_USB_HIDINPUT_POWERBOOK is not set
# CONFIG_HID_FF is not set
# CONFIG_USB_HIDDEV is not set

#
# USB HID Boot Protocol drivers
#
# CONFIG_USB_KBD is not set
# CONFIG_USB_MOUSE 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=m
# CONFIG_USB_DEBUG is not set
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 is not set
# CONFIG_USB_SUSPEND is not set
# CONFIG_USB_PERSIST is not set
# CONFIG_USB_OTG is not set

#
# USB Host Controller Drivers
#
CONFIG_USB_EHCI_HCD=m
CONFIG_USB_EHCI_ROOT_HUB_TT=y
CONFIG_USB_EHCI_TT_NEWSCHED=y
# CONFIG_USB_ISP116X_HCD is not set
# CONFIG_USB_OHCI_HCD is not set
CONFIG_USB_UHCI_HCD=m
# CONFIG_USB_SL811_HCD is not set
# CONFIG_USB_R8A66597_HCD is not set

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

#
# NOTE: USB_STORAGE enables SCSI, and 'SCSI disk support'
#

#
# may also be needed; see USB_STORAGE Help for more information
#
CONFIG_USB_STORAGE=m
# CONFIG_USB_STORAGE_DEBUG is not set
# CONFIG_USB_STORAGE_DATAFAB is not set
# CONFIG_USB_STORAGE_FREECOM is not set
# CONFIG_USB_STORAGE_ISD200 is not set
# CONFIG_USB_STORAGE_DPCM is not set
# CONFIG_USB_STORAGE_USBAT is not set
# CONFIG_USB_STORAGE_SDDR09 is not set
# CONFIG_USB_STORAGE_SDDR55 is not set
# CONFIG_USB_STORAGE_JUMPSHOT is not set
# CONFIG_USB_STORAGE_ALAUDA is not set
# CONFIG_USB_STORAGE_KARMA is not set
# CONFIG_USB_LIBUSUAL is not set

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

#
# USB port drivers
#
# CONFIG_USB_SERIAL 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_AUERSWALD is not set
# CONFIG_USB_RIO500 is not set
# CONFIG_USB_LEGOTOWER is not set
# CONFIG_USB_LCD is not set
# CONFIG_USB_BERRY_CHARGE is not set
# CONFIG_USB_LED is not set
# CONFIG_USB_CYPRESS_CY7C63 is not set
# CONFIG_USB_CYTHERM is not set
# CONFIG_USB_PHIDGET 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 is not set
# CONFIG_USB_TRANCEVIBRATOR is not set
# CONFIG_USB_IOWARRIOR is not set
# CONFIG_USB_GADGET is not set
# CONFIG_MMC is not set
# CONFIG_MEMSTICK is not set
# CONFIG_NEW_LEDS is not set
# CONFIG_INFINIBAND is not set
# CONFIG_EDAC is not set
# CONFIG_RTC_CLASS is not set
# CONFIG_DMADEVICES is not set

#
# Userspace I/O
#
# CONFIG_UIO is not set

#
# Firmware Drivers
#
# CONFIG_EDD is not set
# CONFIG_DELL_RBU is not set
# CONFIG_DCDBAS is not set
# CONFIG_DMIID is not set

#
# File systems
#
CONFIG_EXT2_FS=m
# CONFIG_EXT2_FS_XATTR is not set
# CONFIG_EXT2_FS_XIP is not set
CONFIG_EXT3_FS=y
# CONFIG_EXT3_FS_XATTR is not set
# CONFIG_EXT4DEV_FS is not set
CONFIG_JBD=y
# CONFIG_REISERFS_FS is not set
# CONFIG_JFS_FS is not set
# CONFIG_FS_POSIX_ACL is not set
# CONFIG_XFS_FS is not set
# CONFIG_GFS2_FS is not set
# CONFIG_OCFS2_FS is not set
# CONFIG_DNOTIFY is not set
# CONFIG_INOTIFY is not set
# CONFIG_QUOTA is not set
# CONFIG_AUTOFS_FS is not set
# CONFIG_AUTOFS4_FS is not set
# CONFIG_FUSE_FS is not set

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

#
# DOS/FAT/NT Filesystems
#
CONFIG_FAT_FS=m
# CONFIG_MSDOS_FS is not set
CONFIG_VFAT_FS=m
CONFIG_FAT_DEFAULT_CODEPAGE=866
CONFIG_FAT_DEFAULT_IOCHARSET="koi8-r"
# CONFIG_NTFS_FS is not set

#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
# CONFIG_PROC_KCORE is not set
CONFIG_PROC_SYSCTL=y
CONFIG_SYSFS=y
CONFIG_TMPFS=y
# CONFIG_TMPFS_POSIX_ACL is not set
# CONFIG_HUGETLBFS is not set
# CONFIG_HUGETLB_PAGE is not set
# CONFIG_CONFIGFS_FS is not set

#
# Miscellaneous filesystems
#
# CONFIG_ADFS_FS is not set
# CONFIG_AFFS_FS is not set
# CONFIG_HFS_FS is not set
# CONFIG_HFSPLUS_FS is not set
# CONFIG_BEFS_FS is not set
# CONFIG_BFS_FS is not set
# CONFIG_EFS_FS is not set
# CONFIG_CRAMFS is not set
# CONFIG_VXFS_FS is not set
# CONFIG_MINIX_FS is not set
# CONFIG_HPFS_FS is not set
# CONFIG_QNX4FS_FS is not set
# CONFIG_ROMFS_FS is not set
# CONFIG_SYSV_FS is not set
CONFIG_UFS_FS=m
CONFIG_UFS_FS_WRITE=y
# CONFIG_UFS_DEBUG is not set
CONFIG_NETWORK_FILESYSTEMS=y
# CONFIG_NFS_FS is not set
# CONFIG_NFSD is not set
# CONFIG_SMB_FS is not set
CONFIG_CIFS=m
# CONFIG_CIFS_STATS is not set
# CONFIG_CIFS_WEAK_PW_HASH is not set
# CONFIG_CIFS_XATTR is not set
# CONFIG_CIFS_DEBUG2 is not set
# CONFIG_CIFS_EXPERIMENTAL is not set
# CONFIG_NCP_FS is not set
# CONFIG_CODA_FS is not set
# CONFIG_AFS_FS 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 is not set
CONFIG_MSDOS_PARTITION=y
CONFIG_BSD_DISKLABEL=y
# CONFIG_MINIX_SUBPARTITION is not set
# CONFIG_SOLARIS_X86_PARTITION is not set
# CONFIG_UNIXWARE_DISKLABEL is not set
# CONFIG_LDM_PARTITION is not set
# CONFIG_SGI_PARTITION is not set
# CONFIG_ULTRIX_PARTITION is not set
# CONFIG_SUN_PARTITION is not set
# CONFIG_KARMA_PARTITION is not set
# CONFIG_EFI_PARTITION is not set
# CONFIG_SYSV68_PARTITION is not set
CONFIG_NLS=y
CONFIG_NLS_DEFAULT="utf8"
CONFIG_NLS_CODEPAGE_437=m
# CONFIG_NLS_CODEPAGE_737 is not set
# CONFIG_NLS_CODEPAGE_775 is not set
# CONFIG_NLS_CODEPAGE_850 is not set
# CONFIG_NLS_CODEPAGE_852 is not set
CONFIG_NLS_CODEPAGE_855=m
# 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=m
# 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 is not set
CONFIG_NLS_CODEPAGE_1251=m
CONFIG_NLS_ASCII=m
CONFIG_NLS_ISO8859_1=m
# CONFIG_NLS_ISO8859_2 is not set
# CONFIG_NLS_ISO8859_3 is not set
# CONFIG_NLS_ISO8859_4 is not set
CONFIG_NLS_ISO8859_5=m
# 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=m
# CONFIG_NLS_KOI8_U is not set
CONFIG_NLS_UTF8=m
# CONFIG_DLM is not set

#
# Kernel hacking
#
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
CONFIG_PRINTK_TIME=y
# CONFIG_ENABLE_WARN_DEPRECATED is not set
# CONFIG_ENABLE_MUST_CHECK is not set
CONFIG_MAGIC_SYSRQ=y
# CONFIG_UNUSED_SYMBOLS is not set
# CONFIG_DEBUG_FS is not set
# CONFIG_HEADERS_CHECK is not set
CONFIG_DEBUG_KERNEL=y
# CONFIG_DEBUG_SHIRQ is not set
CONFIG_DETECT_SOFTLOCKUP=y
# CONFIG_SCHED_DEBUG is not set
# CONFIG_SCHEDSTATS is not set
# CONFIG_TIMER_STATS is not set
CONFIG_SLUB_DEBUG_ON=y
CONFIG_SLUB_STATS=y
CONFIG_DEBUG_RT_MUTEXES=y
CONFIG_DEBUG_PI_LIST=y
# CONFIG_RT_MUTEX_TESTER is not set
CONFIG_DEBUG_SPINLOCK=y
CONFIG_DEBUG_MUTEXES=y
CONFIG_DEBUG_LOCK_ALLOC=y
CONFIG_PROVE_LOCKING=y
CONFIG_LOCKDEP=y
# CONFIG_LOCK_STAT is not set
# CONFIG_DEBUG_LOCKDEP is not set
CONFIG_TRACE_IRQFLAGS=y
CONFIG_DEBUG_SPINLOCK_SLEEP=y
# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
CONFIG_STACKTRACE=y
# CONFIG_DEBUG_KOBJECT is not set
CONFIG_DEBUG_BUGVERBOSE=y
CONFIG_DEBUG_INFO=y
CONFIG_DEBUG_VM=y
CONFIG_DEBUG_LIST=y
CONFIG_DEBUG_SG=y
CONFIG_FRAME_POINTER=y
# CONFIG_BOOT_PRINTK_DELAY is not set
# CONFIG_RCU_TORTURE_TEST is not set
# CONFIG_BACKTRACE_SELF_TEST is not set
# CONFIG_FAULT_INJECTION is not set
# CONFIG_LATENCYTOP is not set
# CONFIG_PROVIDE_OHCI1394_DMA_INIT is not set
# CONFIG_SAMPLES is not set
# CONFIG_EARLY_PRINTK is not set
# CONFIG_DEBUG_STACKOVERFLOW is not set
# CONFIG_DEBUG_STACK_USAGE is not set
CONFIG_DEBUG_PAGEALLOC=y
CONFIG_DEBUG_PER_CPU_MAPS=y
CONFIG_DEBUG_RODATA=y
CONFIG_DEBUG_RODATA_TEST=y
# CONFIG_DEBUG_NX_TEST is not set
CONFIG_X86_MPPARSE=y
# CONFIG_IOMMU_DEBUG is not set
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=y
# CONFIG_IO_DELAY_0XED is not set
# CONFIG_IO_DELAY_UDELAY is not set
# CONFIG_IO_DELAY_NONE is not set
CONFIG_DEFAULT_IO_DELAY_TYPE=0
CONFIG_CPA_DEBUG=y

#
# Security options
#
# CONFIG_KEYS is not set
# CONFIG_SECURITY is not set
# CONFIG_SECURITY_FILE_CAPABILITIES is not set
# CONFIG_CRYPTO is not set
CONFIG_HAVE_KVM=y
# CONFIG_VIRTUALIZATION is not set

#
# Library routines
#
CONFIG_BITREVERSE=y
# CONFIG_CRC_CCITT is not set
# CONFIG_CRC16 is not set
# CONFIG_CRC_ITU_T is not set
CONFIG_CRC32=y
# CONFIG_CRC7 is not set
# CONFIG_LIBCRC32C is not set
CONFIG_TEXTSEARCH=y
CONFIG_TEXTSEARCH_KMP=m
CONFIG_TEXTSEARCH_BM=m
CONFIG_TEXTSEARCH_FSM=m
CONFIG_PLIST=y
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT=y
CONFIG_HAS_DMA=y

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Re: RIP __kmem_cache_shrink (was Re: [patch 15/18] FS: Proc filesystem support for slab defrag)

[Christoph Lameter]

Applying Pekka's patch does not fix it? Looks like the another case of the 
missing slab_lock.

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Re: RIP __kmem_cache_shrink (was Re: [patch 15/18] FS: Proc filesystem support for slab defrag)

[Alexey Dobriyan]

On Mon, Apr 14, 2008 at 12:41:11PM -0700, Christoph Lameter wrote:
> Applying Pekka's patch does not fix it? Looks like the another case of the 
> missing slab_lock.

Sadly, no. Oops remains the same.

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Re: RIP __kmem_cache_shrink (was Re: [patch 15/18] FS: Proc filesystem support for slab defrag)

[Pekka Enberg]

On Mon, Apr 14, 2008 at 12:41:11PM -0700, Christoph Lameter wrote:
>> Applying Pekka's patch does not fix it? Looks like the another case of the 
>> missing slab_lock.

Alexey Dobriyan wrote:
> Sadly, no. Oops remains the same.

So you're running 2.6.25-rc8-mm2 and with the following patch:

http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.25-rc8/2.6.25-rc8-mm2/hot-fixes/slub-add-missing-slab_unlock-to-__kmem_cache_shrink.patch

Maybe I'm getting old and need glasses but I simply can't see how on 
earth you can hit the BUG_ON() in __bit_spin_unlock() in the loop...

			Pekka

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Re: [patch 12/18] FS: ExtX filesystem defrag

[Christoph Lameter]

On Mon, 7 Apr 2008, Andrew Morton wrote:

> On Fri, 04 Apr 2008 16:02:10 -0700 Christoph Lameter <clameter@sgi.com> wrote:
> 
> > Support defragmentation for extX filesystem inodes
> > 
> > Reviewed-by: Rik van Riel <riel@redhat.com>
> > Signed-off-by: Christoph Lameter <clameter@sgi.com>
> > ---
> >  fs/ext2/super.c |    9 +++++++++
> >  fs/ext3/super.c |    8 ++++++++
> >  fs/ext4/super.c |    8 ++++++++
> 
> One patch per fs would be preferable please.
> 
> Is there much point in doing this if the ext2 user is mainly (or fully)
> using `-o nobh'?  

The defrag is for inodes, not for buffer heads.
 

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