* Re: [PATCH] per-cgroup tcp buffer limitation
From: Glauber Costa @ 2011-09-07 1:32 UTC (permalink / raw)
To: Paul Menage
Cc: linux-kernel, linux-mm, containers, netdev, xemul,
David S. Miller, Hiroyouki Kamezawa, Eric W. Biederman
In-Reply-To: <CALdu-PDZC3FTuR31d5+P+=U=0UFVUZD_KDEgPHBeD-MyQ4PuSQ@mail.gmail.com>
On 09/06/2011 10:29 PM, Paul Menage wrote:
> On Tue, Sep 6, 2011 at 6:09 PM, Glauber Costa<glommer@parallels.com> wrote:
>>
>> Can you be more specific?
>
> Maybe if you include the source to kmem_cgroup.c :-)
Yeah, *facepalm*.
I am about to send another version, just finishing writing up the docs.
But it is really simple right now, and only cares about the socket
stuff. No reporting, nothing else. My idea is we use it as a seed and
grow it.
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* Re: [PATCH -next v2] unix stream: Fix use-after-free crashes
From: Eric Dumazet @ 2011-09-07 2:35 UTC (permalink / raw)
To: Tim Chen
Cc: Yan, Zheng, netdev@vger.kernel.org, davem@davemloft.net,
sfr@canb.auug.org.au, jirislaby@gmail.com, sedat.dilek@gmail.com,
alex.shi
In-Reply-To: <1315346920.2576.3089.camel@schen9-DESK>
Le mardi 06 septembre 2011 à 15:08 -0700, Tim Chen a écrit :
> On Tue, 2011-09-06 at 22:19 +0200, Eric Dumazet wrote:
>
> >
> > unless scm_ref really means scm_noref ?
> >
> > I really hate this patch. I mean it.
> >
> > I read it 10 times, spent 2 hours and still dont understand it.
> >
>
> Eric,
>
> I've tried another patch to fix my original one. I've used a boolean
> ref_avail to indicate if there is an outstanding ref to scm not yet
> encoded into the skb. Hopefully the logic is clearer in this new patch.
>
> >
> > As I said, we should revert the buggy patch, and rewrite a performance
> > fix from scratch, with not a single get_pid()/put_pid() in fast path.
> >
> > read()/write() on AF_UNIX sockets should not use a single
> > get_pid()/put_pid().
> >
> > This is a serious regression we should fix at 100%, not 50% or even 75%,
> > adding serious bugs.
>
> That will be ideal if there is another way to fix it 100%, other than reverting
> commit 7361c36c. Probably if there is some way we know beforehand that
> both sender and receiver share the same pid, which is quite common, a
> lot of these pid code can be bypassed.
>
Let me restate : Its should be obvious to fix the performance hit for
good.
If namespaces are not used (CONFIG_PID_NS is not set), we can use the
old code, prior to commit 7361c36c : store pid/uid/gid in skb->cb[]
But more generally, when a write() is done on AF_UNIX socket, we pass a
NULL siocb->scm to unix_{dgram|stream}_sendmsg()
if (NULL == siocb->scm)
siocb->scm = &tmp_scm;
There is no need in this case to copy in each skb->cb, pointers to
struct pid and struct cred with their atomic reference being changed in
the sender and receiver.
We try to remove _all_ atomic ops on refcounts not only because atomic
ops are expensive by themselves, but also because of the cache line ping
pongs.
> Tim
>
>
> Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com>
> ---
>
When a patch is wrong, you can admit it and ask for a revert, instead of
obfuscating the code so much that even a netdev guy like me doesnt
understand it anymore.
We speak of a very recent patch in net-next, not yet published to Linus
tree. There is no shame to revert it right now and work on a new patch.
I want to be able to track future bugs on this code, and your patch and
their fixes made functions too hard to read.
If you dont want to work on it, I'll do it myself.
^ permalink raw reply
* Re: [PATCH] per-cgroup tcp buffer limitation
From: Eric Dumazet @ 2011-09-07 2:38 UTC (permalink / raw)
To: Greg Thelen
Cc: Glauber Costa, linux-kernel, linux-mm, containers, netdev, xemul,
David S. Miller, Hiroyouki Kamezawa, Eric W. Biederman
In-Reply-To: <CAHH2K0YJA7vZZ3QNAf63TZOnWhsRUwfuZYfntBL4muZ0G_Vt2w@mail.gmail.com>
Le mardi 06 septembre 2011 à 15:12 -0700, Greg Thelen a écrit :
> >>> +#define sk_sockets_allocated(sk) \
> >>> +({ \
> >>> + struct percpu_counter *__p; \
> >>> + __p = (sk)->sk_prot->sockets_allocated(sk->sk_cgrp); \
> >>> + __p; \
> >>> +})
>
> Could this be simplified as (same applies to following few macros):
>
> static inline struct percpu_counter *sk_sockets_allocated(struct sock *sk)
> {
> return sk->sk_prot->sockets_allocated(sk->sk_cgrp);
> }
>
Please Greg, dont copy/paste huge sequence of code if you dont have
anymore comments.
Right before sending your mail, remove all parts that we already got in
previous mails.
Thanks
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* Re: [PATCH -next v2] unix stream: Fix use-after-free crashes
From: Eric Dumazet @ 2011-09-07 2:55 UTC (permalink / raw)
To: Yan, Zheng
Cc: Tim Chen, Yan, Zheng, netdev@vger.kernel.org, davem@davemloft.net,
sfr@canb.auug.org.au, jirislaby@gmail.com, sedat.dilek@gmail.com,
alex.shi
In-Reply-To: <CAAM7YAnqLyK6JWPW_Y8wD=ykqWMn4fPdJ3_7yUUB+TQZWfDJzQ@mail.gmail.com>
Le mercredi 07 septembre 2011 à 07:09 +0800, Yan, Zheng a écrit :
> On Wed, Sep 7, 2011 at 4:19 AM, Eric Dumazet <eric.dumazet@gmail.com> wrote:
> > Le mardi 06 septembre 2011 à 12:59 -0700, Tim Chen a écrit :
> >> On Tue, 2011-09-06 at 21:43 +0200, Eric Dumazet wrote:
> >> > Le mardi 06 septembre 2011 à 12:33 -0700, Tim Chen a écrit :
> >> >
> >> > > Yes, I think locking the sendmsg for the entire duration of
> >> > > unix_stream_sendmsg makes a lot of sense. It simplifies the logic a lot
> >> > > more. I'll try to cook something up in the next couple of days.
> >> >
> >> > Thats not really possible, we cant hold a spinlock and call
> >> > sock_alloc_send_skb() and/or memcpy_fromiovec(), wich might sleep.
> >> >
> >> > You would need to prepare the full skb list, then :
> >> > - stick the ref on the last skb of the list.
> >> >
> >> > Transfert the whole skb list in other->sk_receive_queue in one go,
> >> > instead of one after another.
> >> >
> >> > Unfortunately, this would break streaming (big send(), and another
> >> > thread doing the receive)
> >> >
> >> > Listen, I am wondering why hackbench even triggers SCM code. This is
> >> > really odd. We should not have a _single_ pid/cred ref/unref at all.
> >> >
> >>
> >> Hackbench triggers the code because it has a bunch of threads sending
> >> msgs on UNIX socket.
> >> >
> >>
> >> Well, if the lock socket approach doesn't work, then my original patch
> >> plus Yan Zheng's fix should still work. I'll try to answer your
> >> objections below:
> >>
> >>
> >> > I was discussing of things after proposed patch, not current net-next.
> >> >
> >> > This reads :
> >> >
> >> > err = unix_scm_to_skb(siocb->scm, skb, !fds_sent, scm_ref);
> >> >
> >> > So first skb is sent without ref taken, as mentioned in Changelog ?
> >> >
> >>
> >> No. the first skb is sent *with* ref taken, as scm_ref is set to true for
> >> first skb.
> >>
> >> >
> >> > If second skb cannot be built, we exit this system call with an already
> >> > queued skb. Receiver can then access to freed memory.
> >> >
> >>
> >> No, we do have reference set. For first skb, in unix_scm_to_skb. For the
> >> second skb (which is the last skb), in scm_sent. Should the second skb alloc failed,
> >> we'll release the ref in scm_destroy. Otherwise, the receiver will release
> >> the references will consuming the skb.
> >>
> >
> > This is crap. This is not the intent of the code I read from the patch.
> >
> > unless scm_ref really means scm_noref ?
> >
> > I really hate this patch. I mean it.
> >
> > I read it 10 times, spent 2 hours and still dont understand it.
> >
>
> Sorry, scm_ref means "sender hold a scm reference". I should add comment for it.
There is no "sender holds a scm reference" requirement.
The process is running, so holds a pid and cred by itself.
If pid/cred pointers are stuffed into skb->cb[], then each last skb must
holds its own reference to pid and cred.
Problem is : we dont know wich skb _is_ the last one, because we can
fail skb allocation or user->kernel copy any time.
Please David just revert 0856a304091b33a8e
I'll work today on a fix to performance regression added in 7361c36c
^ permalink raw reply
* [PATCH v2 0/9] per-cgroup tcp buffers limitation
From: Glauber Costa @ 2011-09-07 4:23 UTC (permalink / raw)
To: linux-kernel; +Cc: linux-mm, containers, netdev, xemul, Glauber Costa
This patch introduces per-cgroup tcp buffers limitation. This allows
sysadmins to specify a maximum amount of kernel memory that
tcp connections can use at any point in time. TCP is the main interest
in this work, but extending it to other protocols would be easy.
For this to work, I am introducing kmem_cgroup, a cgroup targetted
at tracking and controlling objects in kernel memory. Since they
are usually not found in page granularity, and are fundamentally
different from userspace memory (not swappable, can't overcommit),
I am proposing those objects live in its own cgroup rather than
in the memory controller.
It piggybacks in the memory control mechanism already present in
/proc/sys/net/ipv4/tcp_mem. There is a soft limit, and a hard limit,
that will suppress allocation when reached. For each cgroup, however,
the file kmem.tcp_maxmem will be used to cap those values.
The usage I have in mind here is containers. Each container will
define its own values for soft and hard limits, but none of them will
be possibly bigger than the value the box' sysadmin specified from
the outside.
To test for any performance impacts of this patch, I used netperf's
TCP_RR benchmark on localhost, so we can have both recv and snd in action.
Command line used was ./src/netperf -t TCP_RR -H localhost, and the
results:
Without the patch
=================
Socket Size Request Resp. Elapsed Trans.
Send Recv Size Size Time Rate
bytes Bytes bytes bytes secs. per sec
16384 87380 1 1 10.00 26996.35
16384 87380
With the patch
===============
Local /Remote
Socket Size Request Resp. Elapsed Trans.
Send Recv Size Size Time Rate
bytes Bytes bytes bytes secs. per sec
16384 87380 1 1 10.00 27291.86
16384 87380
The difference is within a one-percent range.
Nesting cgroups doesn't seem to be the dominating factor as well,
with nestings up to 10 levels not showing a significant performance
difference.
Glauber Costa (9):
per-netns ipv4 sysctl_tcp_mem
Kernel Memory cgroup
socket: initial cgroup code.
function wrappers for upcoming socket
foundations of per-cgroup memory pressure controlling.
per-cgroup tcp buffers control
tcp buffer limitation: per-cgroup limit
Display current tcp memory allocation in kmem cgroup
Add documentation about kmem_cgroup
Documentation/cgroups/kmem_cgroups.txt | 27 +++++
crypto/af_alg.c | 7 +-
include/linux/cgroup_subsys.h | 4 +
include/linux/kmem_cgroup.h | 194 ++++++++++++++++++++++++++++++++
include/net/netns/ipv4.h | 1 +
include/net/sock.h | 37 +++++-
include/net/tcp.h | 13 ++-
include/net/udp.h | 3 +-
include/trace/events/sock.h | 10 +-
init/Kconfig | 11 ++
mm/Makefile | 1 +
mm/kmem_cgroup.c | 61 ++++++++++
net/core/sock.c | 88 ++++++++++-----
net/decnet/af_decnet.c | 21 +++-
net/ipv4/proc.c | 7 +-
net/ipv4/sysctl_net_ipv4.c | 59 +++++++++-
net/ipv4/tcp.c | 181 ++++++++++++++++++++++++++----
net/ipv4/tcp_input.c | 12 +-
net/ipv4/tcp_ipv4.c | 15 ++-
net/ipv4/tcp_output.c | 2 +-
net/ipv4/tcp_timer.c | 2 +-
net/ipv4/udp.c | 20 +++-
net/ipv6/tcp_ipv6.c | 10 +-
net/ipv6/udp.c | 4 +-
net/sctp/socket.c | 35 +++++--
25 files changed, 710 insertions(+), 115 deletions(-)
create mode 100644 Documentation/cgroups/kmem_cgroups.txt
create mode 100644 include/linux/kmem_cgroup.h
create mode 100644 mm/kmem_cgroup.c
--
1.7.6
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* [PATCH v2 1/9] per-netns ipv4 sysctl_tcp_mem
From: Glauber Costa @ 2011-09-07 4:23 UTC (permalink / raw)
To: linux-kernel
Cc: linux-mm, containers, netdev, xemul, Glauber Costa,
David S. Miller, Hiroyouki Kamezawa, Eric W. Biederman
In-Reply-To: <1315369399-3073-1-git-send-email-glommer@parallels.com>
This patch allows each namespace to independently set up
its levels for tcp memory pressure thresholds. This patch
alone does not buy much: we need to make this values
per group of process somehow. This is achieved in the
patches that follows in this patchset.
Signed-off-by: Glauber Costa <glommer@parallels.com>
CC: David S. Miller <davem@davemloft.net>
CC: Hiroyouki Kamezawa <kamezawa.hiroyu@jp.fujitsu.com>
CC: Eric W. Biederman <ebiederm@xmission.com>
---
include/net/netns/ipv4.h | 1 +
include/net/tcp.h | 1 -
net/ipv4/sysctl_net_ipv4.c | 51 +++++++++++++++++++++++++++++++++++++------
net/ipv4/tcp.c | 13 +++-------
4 files changed, 49 insertions(+), 17 deletions(-)
diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h
index d786b4f..bbd023a 100644
--- a/include/net/netns/ipv4.h
+++ b/include/net/netns/ipv4.h
@@ -55,6 +55,7 @@ struct netns_ipv4 {
int current_rt_cache_rebuild_count;
unsigned int sysctl_ping_group_range[2];
+ long sysctl_tcp_mem[3];
atomic_t rt_genid;
atomic_t dev_addr_genid;
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 149a415..6bfdd9b 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -230,7 +230,6 @@ extern int sysctl_tcp_fack;
extern int sysctl_tcp_reordering;
extern int sysctl_tcp_ecn;
extern int sysctl_tcp_dsack;
-extern long sysctl_tcp_mem[3];
extern int sysctl_tcp_wmem[3];
extern int sysctl_tcp_rmem[3];
extern int sysctl_tcp_app_win;
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index 69fd720..0d74b9d 100644
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -14,6 +14,7 @@
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/nsproxy.h>
+#include <linux/swap.h>
#include <net/snmp.h>
#include <net/icmp.h>
#include <net/ip.h>
@@ -174,6 +175,36 @@ static int proc_allowed_congestion_control(ctl_table *ctl,
return ret;
}
+static int ipv4_tcp_mem(ctl_table *ctl, int write,
+ void __user *buffer, size_t *lenp,
+ loff_t *ppos)
+{
+ int ret;
+ unsigned long vec[3];
+ struct net *net = current->nsproxy->net_ns;
+ int i;
+
+ ctl_table tmp = {
+ .data = &vec,
+ .maxlen = sizeof(vec),
+ .mode = ctl->mode,
+ };
+
+ if (!write) {
+ ctl->data = &net->ipv4.sysctl_tcp_mem;
+ return proc_doulongvec_minmax(ctl, write, buffer, lenp, ppos);
+ }
+
+ ret = proc_doulongvec_minmax(&tmp, write, buffer, lenp, ppos);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < 3; i++)
+ net->ipv4.sysctl_tcp_mem[i] = vec[i];
+
+ return 0;
+}
+
static struct ctl_table ipv4_table[] = {
{
.procname = "tcp_timestamps",
@@ -433,13 +464,6 @@ static struct ctl_table ipv4_table[] = {
.proc_handler = proc_dointvec
},
{
- .procname = "tcp_mem",
- .data = &sysctl_tcp_mem,
- .maxlen = sizeof(sysctl_tcp_mem),
- .mode = 0644,
- .proc_handler = proc_doulongvec_minmax
- },
- {
.procname = "tcp_wmem",
.data = &sysctl_tcp_wmem,
.maxlen = sizeof(sysctl_tcp_wmem),
@@ -721,6 +745,12 @@ static struct ctl_table ipv4_net_table[] = {
.mode = 0644,
.proc_handler = ipv4_ping_group_range,
},
+ {
+ .procname = "tcp_mem",
+ .maxlen = sizeof(init_net.ipv4.sysctl_tcp_mem),
+ .mode = 0644,
+ .proc_handler = ipv4_tcp_mem,
+ },
{ }
};
@@ -734,6 +764,7 @@ EXPORT_SYMBOL_GPL(net_ipv4_ctl_path);
static __net_init int ipv4_sysctl_init_net(struct net *net)
{
struct ctl_table *table;
+ unsigned long limit;
table = ipv4_net_table;
if (!net_eq(net, &init_net)) {
@@ -769,6 +800,12 @@ static __net_init int ipv4_sysctl_init_net(struct net *net)
net->ipv4.sysctl_rt_cache_rebuild_count = 4;
+ limit = nr_free_buffer_pages() / 8;
+ limit = max(limit, 128UL);
+ net->ipv4.sysctl_tcp_mem[0] = limit / 4 * 3;
+ net->ipv4.sysctl_tcp_mem[1] = limit;
+ net->ipv4.sysctl_tcp_mem[2] = net->ipv4.sysctl_tcp_mem[0] * 2;
+
net->ipv4.ipv4_hdr = register_net_sysctl_table(net,
net_ipv4_ctl_path, table);
if (net->ipv4.ipv4_hdr == NULL)
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 46febca..f06df24 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -266,6 +266,7 @@
#include <linux/crypto.h>
#include <linux/time.h>
#include <linux/slab.h>
+#include <linux/nsproxy.h>
#include <net/icmp.h>
#include <net/tcp.h>
@@ -282,11 +283,9 @@ int sysctl_tcp_fin_timeout __read_mostly = TCP_FIN_TIMEOUT;
struct percpu_counter tcp_orphan_count;
EXPORT_SYMBOL_GPL(tcp_orphan_count);
-long sysctl_tcp_mem[3] __read_mostly;
int sysctl_tcp_wmem[3] __read_mostly;
int sysctl_tcp_rmem[3] __read_mostly;
-EXPORT_SYMBOL(sysctl_tcp_mem);
EXPORT_SYMBOL(sysctl_tcp_rmem);
EXPORT_SYMBOL(sysctl_tcp_wmem);
@@ -3277,14 +3276,10 @@ void __init tcp_init(void)
sysctl_tcp_max_orphans = cnt / 2;
sysctl_max_syn_backlog = max(128, cnt / 256);
- limit = nr_free_buffer_pages() / 8;
- limit = max(limit, 128UL);
- sysctl_tcp_mem[0] = limit / 4 * 3;
- sysctl_tcp_mem[1] = limit;
- sysctl_tcp_mem[2] = sysctl_tcp_mem[0] * 2;
-
/* Set per-socket limits to no more than 1/128 the pressure threshold */
- limit = ((unsigned long)sysctl_tcp_mem[1]) << (PAGE_SHIFT - 7);
+ limit = (unsigned long)init_net.ipv4.sysctl_tcp_mem[1];
+ limit <<= (PAGE_SHIFT - 7);
+
max_share = min(4UL*1024*1024, limit);
sysctl_tcp_wmem[0] = SK_MEM_QUANTUM;
--
1.7.6
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* [PATCH v2 2/9] Kernel Memory cgroup
From: Glauber Costa @ 2011-09-07 4:23 UTC (permalink / raw)
To: linux-kernel
Cc: linux-mm, containers, netdev, xemul, Glauber Costa,
David S. Miller, Hiroyouki Kamezawa, Eric W. Biederman
In-Reply-To: <1315369399-3073-1-git-send-email-glommer@parallels.com>
This patch introduces the kernel memory cgroup. Its purpose
is to track and control/limit allocation of kernel objects.
Kernel objects are very different in nature than user memory,
because they can't be swapped out, so can't be overcommited.
The first incarnation is very simple. The current patch doesn't
add any objects to be tracked, but rather, just the cgroup
structure.
Signed-off-by: Glauber Costa <glommer@parallels.com>
CC: David S. Miller <davem@davemloft.net>
CC: Hiroyouki Kamezawa <kamezawa.hiroyu@jp.fujitsu.com>
CC: Eric W. Biederman <ebiederm@xmission.com>
---
include/linux/cgroup_subsys.h | 4 +++
include/linux/kmem_cgroup.h | 53 +++++++++++++++++++++++++++++++++++++++++
init/Kconfig | 11 ++++++++
mm/Makefile | 1 +
mm/kmem_cgroup.c | 53 +++++++++++++++++++++++++++++++++++++++++
5 files changed, 122 insertions(+), 0 deletions(-)
create mode 100644 include/linux/kmem_cgroup.h
create mode 100644 mm/kmem_cgroup.c
diff --git a/include/linux/cgroup_subsys.h b/include/linux/cgroup_subsys.h
index ac663c1..363b8e8 100644
--- a/include/linux/cgroup_subsys.h
+++ b/include/linux/cgroup_subsys.h
@@ -35,6 +35,10 @@ SUBSYS(cpuacct)
SUBSYS(mem_cgroup)
#endif
+#ifdef CONFIG_CGROUP_KMEM
+SUBSYS(kmem)
+#endif
+
/* */
#ifdef CONFIG_CGROUP_DEVICE
diff --git a/include/linux/kmem_cgroup.h b/include/linux/kmem_cgroup.h
new file mode 100644
index 0000000..0e4a74b
--- /dev/null
+++ b/include/linux/kmem_cgroup.h
@@ -0,0 +1,53 @@
+/* kmem_cgroup.h - Kernel Memory Controller
+ *
+ * Copyright Parallels Inc., 2011
+ * Author: Glauber Costa <glommer@parallels.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _LINUX_KMEM_CGROUP_H
+#define _LINUX_KMEM_CGROUP_H
+#include <linux/cgroup.h>
+#include <linux/atomic.h>
+#include <linux/percpu_counter.h>
+
+struct kmem_cgroup {
+ struct cgroup_subsys_state css;
+ struct kmem_cgroup *parent;
+};
+
+
+#ifdef CONFIG_CGROUP_KMEM
+static inline struct kmem_cgroup *kcg_from_cgroup(struct cgroup *cgrp)
+{
+ return container_of(cgroup_subsys_state(cgrp, kmem_subsys_id),
+ struct kmem_cgroup, css);
+}
+
+static inline struct kmem_cgroup *kcg_from_task(struct task_struct *tsk)
+{
+ return container_of(task_subsys_state(tsk, kmem_subsys_id),
+ struct kmem_cgroup, css);
+}
+#else
+static inline struct kmem_cgroup *kcg_from_cgroup(struct cgroup *cgrp)
+{
+ return NULL;
+}
+
+static inline struct kmem_cgroup *kcg_from_task(struct task_struct *tsk)
+{
+ return NULL;
+}
+#endif /* CONFIG_CGROUP_KMEM */
+#endif /* _LINUX_KMEM_CGROUP_H */
+
diff --git a/init/Kconfig b/init/Kconfig
index d627783..5955ac2 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -690,6 +690,17 @@ config CGROUP_MEM_RES_CTLR_SWAP_ENABLED
select this option (if, for some reason, they need to disable it
then swapaccount=0 does the trick).
+config CGROUP_KMEM
+ bool "Kernel Memory Resource Controller for Control Groups"
+ depends on CGROUPS
+ help
+ The Kernel Memory cgroup can limit the amount of memory used by
+ certain kernel objects in the system. Those are fundamentally
+ different from the entities handled by the Memory Controller,
+ which are page-based, and can be swapped. Users of the kmem
+ cgroup can use it to guarantee that no group of processes will
+ ever exhaust kernel resources alone.
+
config CGROUP_PERF
bool "Enable perf_event per-cpu per-container group (cgroup) monitoring"
depends on PERF_EVENTS && CGROUPS
diff --git a/mm/Makefile b/mm/Makefile
index 836e416..1b1aa24 100644
--- a/mm/Makefile
+++ b/mm/Makefile
@@ -45,6 +45,7 @@ obj-$(CONFIG_MIGRATION) += migrate.o
obj-$(CONFIG_QUICKLIST) += quicklist.o
obj-$(CONFIG_TRANSPARENT_HUGEPAGE) += huge_memory.o
obj-$(CONFIG_CGROUP_MEM_RES_CTLR) += memcontrol.o page_cgroup.o
+obj-$(CONFIG_CGROUP_KMEM) += kmem_cgroup.o
obj-$(CONFIG_MEMORY_FAILURE) += memory-failure.o
obj-$(CONFIG_HWPOISON_INJECT) += hwpoison-inject.o
obj-$(CONFIG_DEBUG_KMEMLEAK) += kmemleak.o
diff --git a/mm/kmem_cgroup.c b/mm/kmem_cgroup.c
new file mode 100644
index 0000000..7950e69
--- /dev/null
+++ b/mm/kmem_cgroup.c
@@ -0,0 +1,53 @@
+/* kmem_cgroup.c - Kernel Memory Controller
+ *
+ * Copyright Parallels Inc, 2011
+ * Author: Glauber Costa <glommer@parallels.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/cgroup.h>
+#include <linux/slab.h>
+#include <linux/kmem_cgroup.h>
+
+static int kmem_populate(struct cgroup_subsys *ss, struct cgroup *cgrp)
+{
+ return 0;
+}
+
+static void
+kmem_destroy(struct cgroup_subsys *ss, struct cgroup *cgrp)
+{
+ struct kmem_cgroup *cg = kcg_from_cgroup(cgrp);
+ kfree(cg);
+}
+
+static struct cgroup_subsys_state *kmem_create(
+ struct cgroup_subsys *ss, struct cgroup *cgrp)
+{
+ struct kmem_cgroup *sk = kzalloc(sizeof(*sk), GFP_KERNEL);
+
+ if (!sk)
+ return ERR_PTR(-ENOMEM);
+
+ if (cgrp->parent)
+ sk->parent = kcg_from_cgroup(cgrp->parent);
+
+ return &sk->css;
+}
+
+struct cgroup_subsys kmem_subsys = {
+ .name = "kmem",
+ .create = kmem_create,
+ .destroy = kmem_destroy,
+ .populate = kmem_populate,
+ .subsys_id = kmem_subsys_id,
+};
--
1.7.6
--
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^ permalink raw reply related
* [PATCH v2 3/9] socket: initial cgroup code.
From: Glauber Costa @ 2011-09-07 4:23 UTC (permalink / raw)
To: linux-kernel
Cc: linux-mm, containers, netdev, xemul, Glauber Costa,
David S. Miller, Hiroyouki Kamezawa, Eric W. Biederman
In-Reply-To: <1315369399-3073-1-git-send-email-glommer@parallels.com>
We aim to control the amount of kernel memory pinned at any
time by tcp sockets. To lay the foundations for this work,
this patch adds a pointer to the kmem_cgroup to the socket
structure.
Signed-off-by: Glauber Costa <glommer@parallels.com>
CC: David S. Miller <davem@davemloft.net>
CC: Hiroyouki Kamezawa <kamezawa.hiroyu@jp.fujitsu.com>
CC: Eric W. Biederman <ebiederm@xmission.com>
---
include/linux/kmem_cgroup.h | 29 +++++++++++++++++++++++++++++
include/net/sock.h | 2 ++
net/core/sock.c | 5 ++---
3 files changed, 33 insertions(+), 3 deletions(-)
diff --git a/include/linux/kmem_cgroup.h b/include/linux/kmem_cgroup.h
index 0e4a74b..77076d8 100644
--- a/include/linux/kmem_cgroup.h
+++ b/include/linux/kmem_cgroup.h
@@ -49,5 +49,34 @@ static inline struct kmem_cgroup *kcg_from_task(struct task_struct *tsk)
return NULL;
}
#endif /* CONFIG_CGROUP_KMEM */
+
+#ifdef CONFIG_INET
+#include <net/sock.h>
+static inline void sock_update_kmem_cgrp(struct sock *sk)
+{
+#ifdef CONFIG_CGROUP_KMEM
+ sk->sk_cgrp = kcg_from_task(current);
+
+ /*
+ * We don't need to protect against anything task-related, because
+ * we are basically stuck with the sock pointer that won't change,
+ * even if the task that originated the socket changes cgroups.
+ *
+ * What we do have to guarantee, is that the chain leading us to
+ * the top level won't change under our noses. Incrementing the
+ * reference count via cgroup_exclude_rmdir guarantees that.
+ */
+ cgroup_exclude_rmdir(&sk->sk_cgrp->css);
+#endif
+}
+
+static inline void sock_release_kmem_cgrp(struct sock *sk)
+{
+#ifdef CONFIG_CGROUP_KMEM
+ cgroup_release_and_wakeup_rmdir(&sk->sk_cgrp->css);
+#endif
+}
+
+#endif /* CONFIG_INET */
#endif /* _LINUX_KMEM_CGROUP_H */
diff --git a/include/net/sock.h b/include/net/sock.h
index 8e4062f..709382f 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -228,6 +228,7 @@ struct sock_common {
* @sk_security: used by security modules
* @sk_mark: generic packet mark
* @sk_classid: this socket's cgroup classid
+ * @sk_cgrp: this socket's kernel memory (kmem) cgroup
* @sk_write_pending: a write to stream socket waits to start
* @sk_state_change: callback to indicate change in the state of the sock
* @sk_data_ready: callback to indicate there is data to be processed
@@ -339,6 +340,7 @@ struct sock {
#endif
__u32 sk_mark;
u32 sk_classid;
+ struct kmem_cgroup *sk_cgrp;
void (*sk_state_change)(struct sock *sk);
void (*sk_data_ready)(struct sock *sk, int bytes);
void (*sk_write_space)(struct sock *sk);
diff --git a/net/core/sock.c b/net/core/sock.c
index 3449df8..7109864 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1139,6 +1139,7 @@ struct sock *sk_alloc(struct net *net, int family, gfp_t priority,
atomic_set(&sk->sk_wmem_alloc, 1);
sock_update_classid(sk);
+ sock_update_kmem_cgrp(sk);
}
return sk;
@@ -1170,6 +1171,7 @@ static void __sk_free(struct sock *sk)
put_cred(sk->sk_peer_cred);
put_pid(sk->sk_peer_pid);
put_net(sock_net(sk));
+ sock_release_kmem_cgrp(sk);
sk_prot_free(sk->sk_prot_creator, sk);
}
@@ -2252,9 +2254,6 @@ void sk_common_release(struct sock *sk)
}
EXPORT_SYMBOL(sk_common_release);
-static DEFINE_RWLOCK(proto_list_lock);
-static LIST_HEAD(proto_list);
-
#ifdef CONFIG_PROC_FS
#define PROTO_INUSE_NR 64 /* should be enough for the first time */
struct prot_inuse {
--
1.7.6
--
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^ permalink raw reply related
* [PATCH v2 4/9] function wrappers for upcoming socket
From: Glauber Costa @ 2011-09-07 4:23 UTC (permalink / raw)
To: linux-kernel
Cc: linux-mm, containers, netdev, xemul, Glauber Costa,
David S. Miller, Hiroyouki Kamezawa, Eric W. Biederman
In-Reply-To: <1315369399-3073-1-git-send-email-glommer@parallels.com>
Instead of dealing with global values for memory pressure scenarios,
per-cgroup values will be needed. This patch just writes down the
acessor functions to be used later.
Signed-off-by: Glauber Costa <glommer@parallels.com>
CC: David S. Miller <davem@davemloft.net>
CC: Hiroyouki Kamezawa <kamezawa.hiroyu@jp.fujitsu.com>
CC: Eric W. Biederman <ebiederm@xmission.com>
---
include/linux/kmem_cgroup.h | 104 +++++++++++++++++++++++++++++++++++++++++++
1 files changed, 104 insertions(+), 0 deletions(-)
diff --git a/include/linux/kmem_cgroup.h b/include/linux/kmem_cgroup.h
index 77076d8..d983ba8 100644
--- a/include/linux/kmem_cgroup.h
+++ b/include/linux/kmem_cgroup.h
@@ -52,6 +52,110 @@ static inline struct kmem_cgroup *kcg_from_task(struct task_struct *tsk)
#ifdef CONFIG_INET
#include <net/sock.h>
+static inline int *sk_memory_pressure(struct sock *sk)
+{
+ int *ret = NULL;
+ if (sk->sk_prot->memory_pressure)
+ ret = sk->sk_prot->memory_pressure(sk->sk_cgrp);
+ return ret;
+}
+
+static inline long sk_prot_mem(struct sock *sk, int index)
+{
+ long *prot = sk->sk_prot->prot_mem(sk->sk_cgrp);
+ return prot[index];
+}
+
+static inline long
+sk_memory_allocated(struct sock *sk)
+{
+ struct proto *prot = sk->sk_prot;
+ struct kmem_cgroup *cg = sk->sk_cgrp;
+
+ return atomic_long_read(prot->memory_allocated(cg));
+}
+
+static inline long
+sk_memory_allocated_add(struct sock *sk, int amt, int *parent_failure)
+{
+ struct proto *prot = sk->sk_prot;
+ struct kmem_cgroup *cg = sk->sk_cgrp;
+ long allocated = atomic_long_add_return(amt, prot->memory_allocated(cg));
+
+#ifdef CONFIG_CGROUP_KMEM
+ for (cg = cg->parent; cg != NULL; cg = cg->parent) {
+ long alloc;
+ /*
+ * Large nestings are not the common case, and stopping in the
+ * middle would be complicated enough, that we bill it all the
+ * way through the root, and if needed, unbill everything later
+ */
+ alloc = atomic_long_add_return(amt, prot->memory_allocated(cg));
+ *parent_failure |= (alloc > sk_prot_mem(sk, 2));
+ }
+#endif
+ return allocated;
+}
+
+static inline void
+sk_memory_allocated_sub(struct sock *sk, int amt)
+{
+ struct proto *prot = sk->sk_prot;
+ struct kmem_cgroup *cg = sk->sk_cgrp;
+
+ atomic_long_sub(amt, prot->memory_allocated(cg));
+
+#ifdef CONFIG_CGROUP_KMEM
+ for (cg = sk->sk_cgrp->parent; cg != NULL; cg = cg->parent)
+ atomic_long_sub(amt, prot->memory_allocated(cg));
+#endif
+}
+
+static inline void sk_sockets_allocated_dec(struct sock *sk)
+{
+ struct proto *prot = sk->sk_prot;
+ struct kmem_cgroup *cg = sk->sk_cgrp;
+
+ percpu_counter_dec(prot->sockets_allocated(cg));
+#ifdef CONFIG_CGROUP_KMEM
+ for (cg = sk->sk_cgrp->parent; cg; cg = cg->parent)
+ percpu_counter_dec(prot->sockets_allocated(cg));
+#endif
+}
+
+static inline void sk_sockets_allocated_inc(struct sock *sk)
+{
+ struct proto *prot = sk->sk_prot;
+ struct kmem_cgroup *cg = sk->sk_cgrp;
+
+ percpu_counter_inc(prot->sockets_allocated(cg));
+#ifdef CONFIG_CGROUP_KMEM
+ for (cg = sk->sk_cgrp->parent; cg; cg = cg->parent)
+ percpu_counter_inc(prot->sockets_allocated(cg));
+#endif
+}
+
+static inline int
+sk_sockets_allocated_read_positive(struct sock *sk)
+{
+ struct proto *prot = sk->sk_prot;
+ struct kmem_cgroup *cg = sk->sk_cgrp;
+
+ return percpu_counter_sum_positive(prot->sockets_allocated(cg));
+}
+
+static inline int
+kcg_sockets_allocated_sum_positive(struct proto *prot, struct kmem_cgroup *cg)
+{
+ return percpu_counter_sum_positive(prot->sockets_allocated(cg));
+}
+
+static inline long
+kcg_memory_allocated(struct proto *prot, struct kmem_cgroup *cg)
+{
+ return atomic_long_read(prot->memory_allocated(cg));
+}
+
static inline void sock_update_kmem_cgrp(struct sock *sk)
{
#ifdef CONFIG_CGROUP_KMEM
--
1.7.6
--
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^ permalink raw reply related
* [PATCH v2 5/9] foundations of per-cgroup memory pressure controlling.
From: Glauber Costa @ 2011-09-07 4:23 UTC (permalink / raw)
To: linux-kernel
Cc: linux-mm, containers, netdev, xemul, Glauber Costa,
David S. Miller, Hiroyouki Kamezawa, Eric W. Biederman
In-Reply-To: <1315369399-3073-1-git-send-email-glommer@parallels.com>
This patch converts struct sock fields memory_pressure,
memory_allocated, sockets_allocated, and sysctl_mem (now prot_mem)
to function pointers, receiving a struct kmem_cgroup parameter.
enter_memory_pressure is kept the same, since all its callers
have socket a context, and the kmem_cgroup can be derived from
the socket itself.
To keep things working, the patch convert all users of those fields
to use acessor functions.
In my benchmarks I didn't see a significant performance difference
with this patch applied compared to a baseline (around 1 % diff, thus
inside error margin).
Signed-off-by: Glauber Costa <glommer@parallels.com>
CC: David S. Miller <davem@davemloft.net>
CC: Hiroyouki Kamezawa <kamezawa.hiroyu@jp.fujitsu.com>
CC: Eric W. Biederman <ebiederm@xmission.com>
---
crypto/af_alg.c | 7 ++++-
include/net/sock.h | 27 ++++++++++++++---
include/net/tcp.h | 12 +++++--
include/net/udp.h | 3 +-
include/trace/events/sock.h | 10 +++---
net/core/sock.c | 65 +++++++++++++++++++++++++------------------
net/decnet/af_decnet.c | 21 ++++++++++++--
net/ipv4/proc.c | 7 ++--
net/ipv4/tcp.c | 30 +++++++++++++++++--
net/ipv4/tcp_input.c | 12 ++++----
net/ipv4/tcp_ipv4.c | 15 ++++++----
net/ipv4/tcp_output.c | 2 +-
net/ipv4/tcp_timer.c | 2 +-
net/ipv4/udp.c | 20 ++++++++++---
net/ipv6/tcp_ipv6.c | 10 +++---
net/ipv6/udp.c | 4 +-
net/sctp/socket.c | 35 ++++++++++++++++++-----
17 files changed, 195 insertions(+), 87 deletions(-)
diff --git a/crypto/af_alg.c b/crypto/af_alg.c
index ac33d5f..df168d8 100644
--- a/crypto/af_alg.c
+++ b/crypto/af_alg.c
@@ -29,10 +29,15 @@ struct alg_type_list {
static atomic_long_t alg_memory_allocated;
+static atomic_long_t *memory_allocated_alg(struct kmem_cgroup *sg)
+{
+ return &alg_memory_allocated;
+}
+
static struct proto alg_proto = {
.name = "ALG",
.owner = THIS_MODULE,
- .memory_allocated = &alg_memory_allocated,
+ .memory_allocated = memory_allocated_alg,
.obj_size = sizeof(struct alg_sock),
};
diff --git a/include/net/sock.h b/include/net/sock.h
index 709382f..ab65640 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -54,6 +54,7 @@
#include <linux/security.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
+#include <linux/cgroup.h>
#include <linux/filter.h>
#include <linux/rculist_nulls.h>
@@ -168,6 +169,8 @@ struct sock_common {
/* public: */
};
+struct kmem_cgroup;
+
/**
* struct sock - network layer representation of sockets
* @__sk_common: shared layout with inet_timewait_sock
@@ -786,18 +789,32 @@ struct proto {
unsigned int inuse_idx;
#endif
+ /*
+ * per-cgroup memory tracking:
+ *
+ * The following functions track memory consumption of network buffers
+ * by cgroup (kmem_cgroup) for the current protocol. As of the rest
+ * of the fields in this structure, not all protocols are required
+ * to implement them. Protocols that don't want to do per-cgroup
+ * memory pressure management, can just assume the root cgroup is used.
+ *
+ */
/* Memory pressure */
void (*enter_memory_pressure)(struct sock *sk);
- atomic_long_t *memory_allocated; /* Current allocated memory. */
- struct percpu_counter *sockets_allocated; /* Current number of sockets. */
+ /* Pointer to the current memory allocation of this cgroup. */
+ atomic_long_t *(*memory_allocated)(struct kmem_cgroup *sg);
+ /* Pointer to the current number of sockets in this cgroup. */
+ struct percpu_counter *(*sockets_allocated)(struct kmem_cgroup *sg);
/*
- * Pressure flag: try to collapse.
+ * Per cgroup pointer to the pressure flag: try to collapse.
* Technical note: it is used by multiple contexts non atomically.
* All the __sk_mem_schedule() is of this nature: accounting
* is strict, actions are advisory and have some latency.
*/
- int *memory_pressure;
- long *sysctl_mem;
+ int *(*memory_pressure)(struct kmem_cgroup *sg);
+ /* Pointer to the per-cgroup version of the the sysctl_mem field */
+ long *(*prot_mem)(struct kmem_cgroup *sg);
+
int *sysctl_wmem;
int *sysctl_rmem;
int max_header;
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 6bfdd9b..06b6865 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -45,6 +45,7 @@
#include <net/dst.h>
#include <linux/seq_file.h>
+#include <linux/kmem_cgroup.h>
extern struct inet_hashinfo tcp_hashinfo;
@@ -252,9 +253,12 @@ extern int sysctl_tcp_cookie_size;
extern int sysctl_tcp_thin_linear_timeouts;
extern int sysctl_tcp_thin_dupack;
-extern atomic_long_t tcp_memory_allocated;
-extern struct percpu_counter tcp_sockets_allocated;
-extern int tcp_memory_pressure;
+struct kmem_cgroup;
+extern long *tcp_sysctl_mem(struct kmem_cgroup *sg);
+struct percpu_counter *sockets_allocated_tcp(struct kmem_cgroup *sg);
+int *memory_pressure_tcp(struct kmem_cgroup *sg);
+int tcp_init_cgroup(struct cgroup *cgrp, struct cgroup_subsys *ss);
+atomic_long_t *memory_allocated_tcp(struct kmem_cgroup *sg);
/*
* The next routines deal with comparing 32 bit unsigned ints
@@ -285,7 +289,7 @@ static inline bool tcp_too_many_orphans(struct sock *sk, int shift)
}
if (sk->sk_wmem_queued > SOCK_MIN_SNDBUF &&
- atomic_long_read(&tcp_memory_allocated) > sysctl_tcp_mem[2])
+ sk_memory_allocated(sk) > sk_prot_mem(sk, 2))
return true;
return false;
}
diff --git a/include/net/udp.h b/include/net/udp.h
index 67ea6fc..0e27388 100644
--- a/include/net/udp.h
+++ b/include/net/udp.h
@@ -105,7 +105,8 @@ static inline struct udp_hslot *udp_hashslot2(struct udp_table *table,
extern struct proto udp_prot;
-extern atomic_long_t udp_memory_allocated;
+atomic_long_t *memory_allocated_udp(struct kmem_cgroup *sg);
+long *udp_sysctl_mem(struct kmem_cgroup *sg);
/* sysctl variables for udp */
extern long sysctl_udp_mem[3];
diff --git a/include/trace/events/sock.h b/include/trace/events/sock.h
index 779abb9..12a6083 100644
--- a/include/trace/events/sock.h
+++ b/include/trace/events/sock.h
@@ -37,7 +37,7 @@ TRACE_EVENT(sock_exceed_buf_limit,
TP_STRUCT__entry(
__array(char, name, 32)
- __field(long *, sysctl_mem)
+ __field(long *, prot_mem)
__field(long, allocated)
__field(int, sysctl_rmem)
__field(int, rmem_alloc)
@@ -45,7 +45,7 @@ TRACE_EVENT(sock_exceed_buf_limit,
TP_fast_assign(
strncpy(__entry->name, prot->name, 32);
- __entry->sysctl_mem = prot->sysctl_mem;
+ __entry->prot_mem = sk->sk_prot->prot_mem(sk->sk_cgrp);
__entry->allocated = allocated;
__entry->sysctl_rmem = prot->sysctl_rmem[0];
__entry->rmem_alloc = atomic_read(&sk->sk_rmem_alloc);
@@ -54,9 +54,9 @@ TRACE_EVENT(sock_exceed_buf_limit,
TP_printk("proto:%s sysctl_mem=%ld,%ld,%ld allocated=%ld "
"sysctl_rmem=%d rmem_alloc=%d",
__entry->name,
- __entry->sysctl_mem[0],
- __entry->sysctl_mem[1],
- __entry->sysctl_mem[2],
+ __entry->prot_mem[0],
+ __entry->prot_mem[1],
+ __entry->prot_mem[2],
__entry->allocated,
__entry->sysctl_rmem,
__entry->rmem_alloc)
diff --git a/net/core/sock.c b/net/core/sock.c
index 7109864..ead9c02 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1290,7 +1290,7 @@ struct sock *sk_clone(const struct sock *sk, const gfp_t priority)
newsk->sk_wq = NULL;
if (newsk->sk_prot->sockets_allocated)
- percpu_counter_inc(newsk->sk_prot->sockets_allocated);
+ sk_sockets_allocated_inc(newsk);
if (sock_flag(newsk, SOCK_TIMESTAMP) ||
sock_flag(newsk, SOCK_TIMESTAMPING_RX_SOFTWARE))
@@ -1681,30 +1681,33 @@ int __sk_mem_schedule(struct sock *sk, int size, int kind)
struct proto *prot = sk->sk_prot;
int amt = sk_mem_pages(size);
long allocated;
+ int *memory_pressure;
+ int parent_failure = 0;
sk->sk_forward_alloc += amt * SK_MEM_QUANTUM;
- allocated = atomic_long_add_return(amt, prot->memory_allocated);
- /* Under limit. */
- if (allocated <= prot->sysctl_mem[0]) {
- if (prot->memory_pressure && *prot->memory_pressure)
- *prot->memory_pressure = 0;
- return 1;
- }
+ memory_pressure = sk_memory_pressure(sk);
+ allocated = sk_memory_allocated_add(sk, amt, &parent_failure);
+
+ /* Over hard limit (we, or our parents) */
+ if (parent_failure || (allocated > sk_prot_mem(sk, 2)))
+ goto suppress_allocation;
- /* Under pressure. */
- if (allocated > prot->sysctl_mem[1])
+ /* Under limit. */
+ if (allocated <= sk_prot_mem(sk, 0))
+ if (memory_pressure && *memory_pressure)
+ *memory_pressure = 0;
+
+ /* Under pressure. */
+ if (allocated > sk_prot_mem(sk, 1))
if (prot->enter_memory_pressure)
prot->enter_memory_pressure(sk);
- /* Over hard limit. */
- if (allocated > prot->sysctl_mem[2])
- goto suppress_allocation;
-
/* guarantee minimum buffer size under pressure */
if (kind == SK_MEM_RECV) {
if (atomic_read(&sk->sk_rmem_alloc) < prot->sysctl_rmem[0])
return 1;
+
} else { /* SK_MEM_SEND */
if (sk->sk_type == SOCK_STREAM) {
if (sk->sk_wmem_queued < prot->sysctl_wmem[0])
@@ -1714,13 +1717,13 @@ int __sk_mem_schedule(struct sock *sk, int size, int kind)
return 1;
}
- if (prot->memory_pressure) {
+ if (memory_pressure) {
int alloc;
- if (!*prot->memory_pressure)
+ if (!*memory_pressure)
return 1;
- alloc = percpu_counter_read_positive(prot->sockets_allocated);
- if (prot->sysctl_mem[2] > alloc *
+ alloc = sk_sockets_allocated_read_positive(sk);
+ if (sk_prot_mem(sk, 2) > alloc *
sk_mem_pages(sk->sk_wmem_queued +
atomic_read(&sk->sk_rmem_alloc) +
sk->sk_forward_alloc))
@@ -1743,7 +1746,9 @@ suppress_allocation:
/* Alas. Undo changes. */
sk->sk_forward_alloc -= amt * SK_MEM_QUANTUM;
- atomic_long_sub(amt, prot->memory_allocated);
+
+ sk_memory_allocated_sub(sk, amt);
+
return 0;
}
EXPORT_SYMBOL(__sk_mem_schedule);
@@ -1754,15 +1759,14 @@ EXPORT_SYMBOL(__sk_mem_schedule);
*/
void __sk_mem_reclaim(struct sock *sk)
{
- struct proto *prot = sk->sk_prot;
+ int *memory_pressure = sk_memory_pressure(sk);
- atomic_long_sub(sk->sk_forward_alloc >> SK_MEM_QUANTUM_SHIFT,
- prot->memory_allocated);
+ sk_memory_allocated_sub(sk, sk->sk_forward_alloc >> SK_MEM_QUANTUM_SHIFT);
sk->sk_forward_alloc &= SK_MEM_QUANTUM - 1;
- if (prot->memory_pressure && *prot->memory_pressure &&
- (atomic_long_read(prot->memory_allocated) < prot->sysctl_mem[0]))
- *prot->memory_pressure = 0;
+ if (memory_pressure && *memory_pressure &&
+ (sk_memory_allocated(sk) < sk_prot_mem(sk, 0)))
+ *memory_pressure = 0;
}
EXPORT_SYMBOL(__sk_mem_reclaim);
@@ -2478,13 +2482,20 @@ static char proto_method_implemented(const void *method)
static void proto_seq_printf(struct seq_file *seq, struct proto *proto)
{
+ struct kmem_cgroup *cg = kcg_from_task(current);
+ int *memory_pressure = NULL;
+
+ if (proto->memory_pressure)
+ memory_pressure = proto->memory_pressure(cg);
+
seq_printf(seq, "%-9s %4u %6d %6ld %-3s %6u %-3s %-10s "
"%2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c\n",
proto->name,
proto->obj_size,
sock_prot_inuse_get(seq_file_net(seq), proto),
- proto->memory_allocated != NULL ? atomic_long_read(proto->memory_allocated) : -1L,
- proto->memory_pressure != NULL ? *proto->memory_pressure ? "yes" : "no" : "NI",
+ proto->memory_allocated != NULL ?
+ kcg_memory_allocated(proto, cg) : -1L,
+ memory_pressure != NULL ? *memory_pressure ? "yes" : "no" : "NI",
proto->max_header,
proto->slab == NULL ? "no" : "yes",
module_name(proto->owner),
diff --git a/net/decnet/af_decnet.c b/net/decnet/af_decnet.c
index 19acd00..463b299 100644
--- a/net/decnet/af_decnet.c
+++ b/net/decnet/af_decnet.c
@@ -458,13 +458,28 @@ static void dn_enter_memory_pressure(struct sock *sk)
}
}
+static atomic_long_t *memory_allocated_dn(struct kmem_cgroup *sg)
+{
+ return &decnet_memory_allocated;
+}
+
+static int *memory_pressure_dn(struct kmem_cgroup *sg)
+{
+ return &dn_memory_pressure;
+}
+
+static long *dn_sysctl_mem(struct kmem_cgroup *sg)
+{
+ return sysctl_decnet_mem;
+}
+
static struct proto dn_proto = {
.name = "NSP",
.owner = THIS_MODULE,
.enter_memory_pressure = dn_enter_memory_pressure,
- .memory_pressure = &dn_memory_pressure,
- .memory_allocated = &decnet_memory_allocated,
- .sysctl_mem = sysctl_decnet_mem,
+ .memory_pressure = memory_pressure_dn,
+ .memory_allocated = memory_allocated_dn,
+ .prot_mem = dn_sysctl_mem,
.sysctl_wmem = sysctl_decnet_wmem,
.sysctl_rmem = sysctl_decnet_rmem,
.max_header = DN_MAX_NSP_DATA_HEADER + 64,
diff --git a/net/ipv4/proc.c b/net/ipv4/proc.c
index b14ec7d..ebe938f 100644
--- a/net/ipv4/proc.c
+++ b/net/ipv4/proc.c
@@ -52,20 +52,21 @@ static int sockstat_seq_show(struct seq_file *seq, void *v)
{
struct net *net = seq->private;
int orphans, sockets;
+ struct kmem_cgroup *cg = kcg_from_task(current);
local_bh_disable();
orphans = percpu_counter_sum_positive(&tcp_orphan_count);
- sockets = percpu_counter_sum_positive(&tcp_sockets_allocated);
+ sockets = kcg_sockets_allocated_sum_positive(&tcp_prot, cg);
local_bh_enable();
socket_seq_show(seq);
seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %ld\n",
sock_prot_inuse_get(net, &tcp_prot), orphans,
tcp_death_row.tw_count, sockets,
- atomic_long_read(&tcp_memory_allocated));
+ kcg_memory_allocated(&tcp_prot, cg));
seq_printf(seq, "UDP: inuse %d mem %ld\n",
sock_prot_inuse_get(net, &udp_prot),
- atomic_long_read(&udp_memory_allocated));
+ kcg_memory_allocated(&udp_prot, cg));
seq_printf(seq, "UDPLITE: inuse %d\n",
sock_prot_inuse_get(net, &udplite_prot));
seq_printf(seq, "RAW: inuse %d\n",
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index f06df24..76f03ed 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -290,13 +290,11 @@ EXPORT_SYMBOL(sysctl_tcp_rmem);
EXPORT_SYMBOL(sysctl_tcp_wmem);
atomic_long_t tcp_memory_allocated; /* Current allocated memory. */
-EXPORT_SYMBOL(tcp_memory_allocated);
/*
* Current number of TCP sockets.
*/
struct percpu_counter tcp_sockets_allocated;
-EXPORT_SYMBOL(tcp_sockets_allocated);
/*
* TCP splice context
@@ -314,16 +312,40 @@ struct tcp_splice_state {
* is strict, actions are advisory and have some latency.
*/
int tcp_memory_pressure __read_mostly;
-EXPORT_SYMBOL(tcp_memory_pressure);
-void tcp_enter_memory_pressure(struct sock *sk)
+int *memory_pressure_tcp(struct kmem_cgroup *sg)
+{
+ return &tcp_memory_pressure;
+}
+
+struct percpu_counter *sockets_allocated_tcp(struct kmem_cgroup *sg)
+{
+ return &tcp_sockets_allocated;
+}
+
+void tcp_enter_memory_pressure(struct sock *sock)
{
if (!tcp_memory_pressure) {
NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPMEMORYPRESSURES);
tcp_memory_pressure = 1;
}
}
+
+long *tcp_sysctl_mem(struct kmem_cgroup *sg)
+{
+ return init_net.ipv4.sysctl_tcp_mem;
+}
+
+atomic_long_t *memory_allocated_tcp(struct kmem_cgroup *sg)
+{
+ return &tcp_memory_allocated;
+}
+
+EXPORT_SYMBOL(memory_pressure_tcp);
+EXPORT_SYMBOL(sockets_allocated_tcp);
EXPORT_SYMBOL(tcp_enter_memory_pressure);
+EXPORT_SYMBOL(tcp_sysctl_mem);
+EXPORT_SYMBOL(memory_allocated_tcp);
/* Convert seconds to retransmits based on initial and max timeout */
static u8 secs_to_retrans(int seconds, int timeout, int rto_max)
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index ea0d218..3f17423 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -316,7 +316,7 @@ static void tcp_grow_window(struct sock *sk, struct sk_buff *skb)
/* Check #1 */
if (tp->rcv_ssthresh < tp->window_clamp &&
(int)tp->rcv_ssthresh < tcp_space(sk) &&
- !tcp_memory_pressure) {
+ !sk_memory_pressure(sk)) {
int incr;
/* Check #2. Increase window, if skb with such overhead
@@ -398,8 +398,8 @@ static void tcp_clamp_window(struct sock *sk)
if (sk->sk_rcvbuf < sysctl_tcp_rmem[2] &&
!(sk->sk_userlocks & SOCK_RCVBUF_LOCK) &&
- !tcp_memory_pressure &&
- atomic_long_read(&tcp_memory_allocated) < sysctl_tcp_mem[0]) {
+ !sk_memory_pressure(sk) &&
+ sk_memory_allocated(sk) < sk_prot_mem(sk, 0)) {
sk->sk_rcvbuf = min(atomic_read(&sk->sk_rmem_alloc),
sysctl_tcp_rmem[2]);
}
@@ -4806,7 +4806,7 @@ static int tcp_prune_queue(struct sock *sk)
if (atomic_read(&sk->sk_rmem_alloc) >= sk->sk_rcvbuf)
tcp_clamp_window(sk);
- else if (tcp_memory_pressure)
+ else if (sk_memory_pressure(sk))
tp->rcv_ssthresh = min(tp->rcv_ssthresh, 4U * tp->advmss);
tcp_collapse_ofo_queue(sk);
@@ -4872,11 +4872,11 @@ static int tcp_should_expand_sndbuf(struct sock *sk)
return 0;
/* If we are under global TCP memory pressure, do not expand. */
- if (tcp_memory_pressure)
+ if (sk_memory_pressure(sk))
return 0;
/* If we are under soft global TCP memory pressure, do not expand. */
- if (atomic_long_read(&tcp_memory_allocated) >= sysctl_tcp_mem[0])
+ if (sk_memory_allocated(sk) >= sk_prot_mem(sk, 0))
return 0;
/* If we filled the congestion window, do not expand. */
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 1c12b8e..69a02fa 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -1901,7 +1901,7 @@ static int tcp_v4_init_sock(struct sock *sk)
sk->sk_rcvbuf = sysctl_tcp_rmem[1];
local_bh_disable();
- percpu_counter_inc(&tcp_sockets_allocated);
+ sk_sockets_allocated_inc(sk);
local_bh_enable();
return 0;
@@ -1957,7 +1957,7 @@ void tcp_v4_destroy_sock(struct sock *sk)
tp->cookie_values = NULL;
}
- percpu_counter_dec(&tcp_sockets_allocated);
+ sk_sockets_allocated_dec(sk);
}
EXPORT_SYMBOL(tcp_v4_destroy_sock);
@@ -2598,11 +2598,14 @@ struct proto tcp_prot = {
.unhash = inet_unhash,
.get_port = inet_csk_get_port,
.enter_memory_pressure = tcp_enter_memory_pressure,
- .sockets_allocated = &tcp_sockets_allocated,
+ .memory_pressure = memory_pressure_tcp,
+ .sockets_allocated = sockets_allocated_tcp,
.orphan_count = &tcp_orphan_count,
- .memory_allocated = &tcp_memory_allocated,
- .memory_pressure = &tcp_memory_pressure,
- .sysctl_mem = sysctl_tcp_mem,
+ .memory_allocated = memory_allocated_tcp,
+#ifdef CONFIG_CGROUP_KMEM
+ .init_cgroup = tcp_init_cgroup,
+#endif
+ .prot_mem = tcp_sysctl_mem,
.sysctl_wmem = sysctl_tcp_wmem,
.sysctl_rmem = sysctl_tcp_rmem,
.max_header = MAX_TCP_HEADER,
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 882e0b0..06aeb31 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -1912,7 +1912,7 @@ u32 __tcp_select_window(struct sock *sk)
if (free_space < (full_space >> 1)) {
icsk->icsk_ack.quick = 0;
- if (tcp_memory_pressure)
+ if (sk_memory_pressure(sk))
tp->rcv_ssthresh = min(tp->rcv_ssthresh,
4U * tp->advmss);
diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
index ecd44b0..2c67617 100644
--- a/net/ipv4/tcp_timer.c
+++ b/net/ipv4/tcp_timer.c
@@ -261,7 +261,7 @@ static void tcp_delack_timer(unsigned long data)
}
out:
- if (tcp_memory_pressure)
+ if (sk_memory_pressure(sk))
sk_mem_reclaim(sk);
out_unlock:
bh_unlock_sock(sk);
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 1b5a193..6c08c65 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -120,9 +120,6 @@ EXPORT_SYMBOL(sysctl_udp_rmem_min);
int sysctl_udp_wmem_min __read_mostly;
EXPORT_SYMBOL(sysctl_udp_wmem_min);
-atomic_long_t udp_memory_allocated;
-EXPORT_SYMBOL(udp_memory_allocated);
-
#define MAX_UDP_PORTS 65536
#define PORTS_PER_CHAIN (MAX_UDP_PORTS / UDP_HTABLE_SIZE_MIN)
@@ -1918,6 +1915,19 @@ unsigned int udp_poll(struct file *file, struct socket *sock, poll_table *wait)
}
EXPORT_SYMBOL(udp_poll);
+static atomic_long_t udp_memory_allocated;
+atomic_long_t *memory_allocated_udp(struct kmem_cgroup *sg)
+{
+ return &udp_memory_allocated;
+}
+EXPORT_SYMBOL(memory_allocated_udp);
+
+long *udp_sysctl_mem(struct kmem_cgroup *sg)
+{
+ return sysctl_udp_mem;
+}
+EXPORT_SYMBOL(udp_sysctl_mem);
+
struct proto udp_prot = {
.name = "UDP",
.owner = THIS_MODULE,
@@ -1936,8 +1946,8 @@ struct proto udp_prot = {
.unhash = udp_lib_unhash,
.rehash = udp_v4_rehash,
.get_port = udp_v4_get_port,
- .memory_allocated = &udp_memory_allocated,
- .sysctl_mem = sysctl_udp_mem,
+ .memory_allocated = &memory_allocated_udp,
+ .prot_mem = udp_sysctl_mem,
.sysctl_wmem = &sysctl_udp_wmem_min,
.sysctl_rmem = &sysctl_udp_rmem_min,
.obj_size = sizeof(struct udp_sock),
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index d1fb63f..807797a 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -2012,7 +2012,7 @@ static int tcp_v6_init_sock(struct sock *sk)
sk->sk_rcvbuf = sysctl_tcp_rmem[1];
local_bh_disable();
- percpu_counter_inc(&tcp_sockets_allocated);
+ sk_sockets_allocated_inc(sk);
local_bh_enable();
return 0;
@@ -2221,11 +2221,11 @@ struct proto tcpv6_prot = {
.unhash = inet_unhash,
.get_port = inet_csk_get_port,
.enter_memory_pressure = tcp_enter_memory_pressure,
- .sockets_allocated = &tcp_sockets_allocated,
- .memory_allocated = &tcp_memory_allocated,
- .memory_pressure = &tcp_memory_pressure,
+ .sockets_allocated = sockets_allocated_tcp,
+ .memory_allocated = memory_allocated_tcp,
+ .memory_pressure = memory_pressure_tcp,
.orphan_count = &tcp_orphan_count,
- .sysctl_mem = sysctl_tcp_mem,
+ .prot_mem = tcp_sysctl_mem,
.sysctl_wmem = sysctl_tcp_wmem,
.sysctl_rmem = sysctl_tcp_rmem,
.max_header = MAX_TCP_HEADER,
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 29213b5..ef4b5b3 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -1465,8 +1465,8 @@ struct proto udpv6_prot = {
.unhash = udp_lib_unhash,
.rehash = udp_v6_rehash,
.get_port = udp_v6_get_port,
- .memory_allocated = &udp_memory_allocated,
- .sysctl_mem = sysctl_udp_mem,
+ .memory_allocated = memory_allocated_udp,
+ .prot_mem = udp_sysctl_mem,
.sysctl_wmem = &sysctl_udp_wmem_min,
.sysctl_rmem = &sysctl_udp_rmem_min,
.obj_size = sizeof(struct udp6_sock),
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 836aa63..1b0300d 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -119,11 +119,30 @@ static int sctp_memory_pressure;
static atomic_long_t sctp_memory_allocated;
struct percpu_counter sctp_sockets_allocated;
+static long *sctp_sysctl_mem(struct kmem_cgroup *sg)
+{
+ return sysctl_sctp_mem;
+}
+
static void sctp_enter_memory_pressure(struct sock *sk)
{
sctp_memory_pressure = 1;
}
+static int *memory_pressure_sctp(struct kmem_cgroup *sg)
+{
+ return &sctp_memory_pressure;
+}
+
+static atomic_long_t *memory_allocated_sctp(struct kmem_cgroup *sg)
+{
+ return &sctp_memory_allocated;
+}
+
+static struct percpu_counter *sockets_allocated_sctp(struct kmem_cgroup *sg)
+{
+ return &sctp_sockets_allocated;
+}
/* Get the sndbuf space available at the time on the association. */
static inline int sctp_wspace(struct sctp_association *asoc)
@@ -6831,13 +6850,13 @@ struct proto sctp_prot = {
.unhash = sctp_unhash,
.get_port = sctp_get_port,
.obj_size = sizeof(struct sctp_sock),
- .sysctl_mem = sysctl_sctp_mem,
+ .prot_mem = sctp_sysctl_mem,
.sysctl_rmem = sysctl_sctp_rmem,
.sysctl_wmem = sysctl_sctp_wmem,
- .memory_pressure = &sctp_memory_pressure,
+ .memory_pressure = memory_pressure_sctp,
.enter_memory_pressure = sctp_enter_memory_pressure,
- .memory_allocated = &sctp_memory_allocated,
- .sockets_allocated = &sctp_sockets_allocated,
+ .memory_allocated = memory_allocated_sctp,
+ .sockets_allocated = sockets_allocated_sctp,
};
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
@@ -6863,12 +6882,12 @@ struct proto sctpv6_prot = {
.unhash = sctp_unhash,
.get_port = sctp_get_port,
.obj_size = sizeof(struct sctp6_sock),
- .sysctl_mem = sysctl_sctp_mem,
+ .prot_mem = sctp_sysctl_mem,
.sysctl_rmem = sysctl_sctp_rmem,
.sysctl_wmem = sysctl_sctp_wmem,
- .memory_pressure = &sctp_memory_pressure,
+ .memory_pressure = memory_pressure_sctp,
.enter_memory_pressure = sctp_enter_memory_pressure,
- .memory_allocated = &sctp_memory_allocated,
- .sockets_allocated = &sctp_sockets_allocated,
+ .memory_allocated = memory_allocated_sctp,
+ .sockets_allocated = sockets_allocated_sctp,
};
#endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
--
1.7.6
--
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^ permalink raw reply related
* [PATCH v2 6/9] per-cgroup tcp buffers control
From: Glauber Costa @ 2011-09-07 4:23 UTC (permalink / raw)
To: linux-kernel
Cc: linux-mm, containers, netdev, xemul, Glauber Costa,
David S. Miller, Hiroyouki Kamezawa, Eric W. Biederman
In-Reply-To: <1315369399-3073-1-git-send-email-glommer@parallels.com>
With all the infrastructure in place, this patch implements
per-cgroup control for tcp memory pressure handling.
Signed-off-by: Glauber Costa <glommer@parallels.com>
CC: David S. Miller <davem@davemloft.net>
CC: Hiroyouki Kamezawa <kamezawa.hiroyu@jp.fujitsu.com>
CC: Eric W. Biederman <ebiederm@xmission.com>
---
include/linux/kmem_cgroup.h | 7 ++++
include/net/sock.h | 10 ++++++-
mm/kmem_cgroup.c | 10 ++++++-
net/core/sock.c | 18 +++++++++++
net/ipv4/tcp.c | 67 +++++++++++++++++++++++++++++++++++++-----
5 files changed, 102 insertions(+), 10 deletions(-)
diff --git a/include/linux/kmem_cgroup.h b/include/linux/kmem_cgroup.h
index d983ba8..89ad0a1 100644
--- a/include/linux/kmem_cgroup.h
+++ b/include/linux/kmem_cgroup.h
@@ -23,6 +23,13 @@
struct kmem_cgroup {
struct cgroup_subsys_state css;
struct kmem_cgroup *parent;
+
+#ifdef CONFIG_INET
+ int tcp_memory_pressure;
+ atomic_long_t tcp_memory_allocated;
+ struct percpu_counter tcp_sockets_allocated;
+ long tcp_prot_mem[3];
+#endif
};
diff --git a/include/net/sock.h b/include/net/sock.h
index ab65640..91424e3 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -64,6 +64,7 @@
#include <net/dst.h>
#include <net/checksum.h>
+int sockets_populate(struct cgroup_subsys *ss, struct cgroup *cgrp);
/*
* This structure really needs to be cleaned up.
* Most of it is for TCP, and not used by any of
@@ -814,7 +815,14 @@ struct proto {
int *(*memory_pressure)(struct kmem_cgroup *sg);
/* Pointer to the per-cgroup version of the the sysctl_mem field */
long *(*prot_mem)(struct kmem_cgroup *sg);
-
+ /*
+ * cgroup specific initialization function. Called once for all
+ * protocols that implement it, from cgroups populate function.
+ * This function has to setup any files the protocol want to
+ * appear in the kmem cgroup filesystem.
+ */
+ int (*init_cgroup)(struct cgroup *cgrp,
+ struct cgroup_subsys *ss);
int *sysctl_wmem;
int *sysctl_rmem;
int max_header;
diff --git a/mm/kmem_cgroup.c b/mm/kmem_cgroup.c
index 7950e69..5e53d66 100644
--- a/mm/kmem_cgroup.c
+++ b/mm/kmem_cgroup.c
@@ -17,16 +17,24 @@
#include <linux/cgroup.h>
#include <linux/slab.h>
#include <linux/kmem_cgroup.h>
+#include <net/sock.h>
static int kmem_populate(struct cgroup_subsys *ss, struct cgroup *cgrp)
{
- return 0;
+ int ret = 0;
+#ifdef CONFIG_NET
+ ret = sockets_populate(ss, cgrp);
+#endif
+ return ret;
}
static void
kmem_destroy(struct cgroup_subsys *ss, struct cgroup *cgrp)
{
struct kmem_cgroup *cg = kcg_from_cgroup(cgrp);
+#ifdef CONFIG_INET
+ percpu_counter_destroy(&cg->tcp_sockets_allocated);
+#endif
kfree(cg);
}
diff --git a/net/core/sock.c b/net/core/sock.c
index ead9c02..9d833cf 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -134,6 +134,24 @@
#include <net/tcp.h>
#endif
+static DEFINE_RWLOCK(proto_list_lock);
+static LIST_HEAD(proto_list);
+
+int sockets_populate(struct cgroup_subsys *ss, struct cgroup *cgrp)
+{
+ struct proto *proto;
+ int ret = 0;
+
+ read_lock(&proto_list_lock);
+ list_for_each_entry(proto, &proto_list, node) {
+ if (proto->init_cgroup)
+ ret |= proto->init_cgroup(cgrp, ss);
+ }
+ read_unlock(&proto_list_lock);
+
+ return ret;
+}
+
/*
* Each address family might have different locking rules, so we have
* one slock key per address family:
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 76f03ed..0725dc4 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -289,13 +289,6 @@ int sysctl_tcp_rmem[3] __read_mostly;
EXPORT_SYMBOL(sysctl_tcp_rmem);
EXPORT_SYMBOL(sysctl_tcp_wmem);
-atomic_long_t tcp_memory_allocated; /* Current allocated memory. */
-
-/*
- * Current number of TCP sockets.
- */
-struct percpu_counter tcp_sockets_allocated;
-
/*
* TCP splice context
*/
@@ -305,13 +298,68 @@ struct tcp_splice_state {
unsigned int flags;
};
+#ifdef CONFIG_CGROUP_KMEM
/*
* Pressure flag: try to collapse.
* Technical note: it is used by multiple contexts non atomically.
* All the __sk_mem_schedule() is of this nature: accounting
* is strict, actions are advisory and have some latency.
*/
-int tcp_memory_pressure __read_mostly;
+void tcp_enter_memory_pressure(struct sock *sk)
+{
+ struct kmem_cgroup *sg = sk->sk_cgrp;
+ if (!sg->tcp_memory_pressure) {
+ NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPMEMORYPRESSURES);
+ sg->tcp_memory_pressure = 1;
+ }
+}
+
+long *tcp_sysctl_mem(struct kmem_cgroup *sg)
+{
+ return sg->tcp_prot_mem;
+}
+
+atomic_long_t *memory_allocated_tcp(struct kmem_cgroup *sg)
+{
+ return &(sg->tcp_memory_allocated);
+}
+
+int tcp_init_cgroup(struct cgroup *cgrp, struct cgroup_subsys *ss)
+{
+ struct kmem_cgroup *sg = kcg_from_cgroup(cgrp);
+ unsigned long limit;
+ struct net *net = current->nsproxy->net_ns;
+
+ sg->tcp_memory_pressure = 0;
+ atomic_long_set(&sg->tcp_memory_allocated, 0);
+ percpu_counter_init(&sg->tcp_sockets_allocated, 0);
+
+ limit = nr_free_buffer_pages() / 8;
+ limit = max(limit, 128UL);
+
+ sg->tcp_prot_mem[0] = net->ipv4.sysctl_tcp_mem[0];
+ sg->tcp_prot_mem[1] = net->ipv4.sysctl_tcp_mem[1];
+ sg->tcp_prot_mem[2] = net->ipv4.sysctl_tcp_mem[2];
+
+ return 0;
+}
+EXPORT_SYMBOL(tcp_init_cgroup);
+
+int *memory_pressure_tcp(struct kmem_cgroup *sg)
+{
+ return &sg->tcp_memory_pressure;
+}
+
+struct percpu_counter *sockets_allocated_tcp(struct kmem_cgroup *sg)
+{
+ return &sg->tcp_sockets_allocated;
+}
+#else
+
+/* Current number of TCP sockets. */
+struct percpu_counter tcp_sockets_allocated;
+atomic_long_t tcp_memory_allocated; /* Current allocated memory. */
+int tcp_memory_pressure;
int *memory_pressure_tcp(struct kmem_cgroup *sg)
{
@@ -340,6 +388,7 @@ atomic_long_t *memory_allocated_tcp(struct kmem_cgroup *sg)
{
return &tcp_memory_allocated;
}
+#endif /* CONFIG_CGROUP_KMEM */
EXPORT_SYMBOL(memory_pressure_tcp);
EXPORT_SYMBOL(sockets_allocated_tcp);
@@ -3247,7 +3296,9 @@ void __init tcp_init(void)
BUILD_BUG_ON(sizeof(struct tcp_skb_cb) > sizeof(skb->cb));
+#ifndef CONFIG_CGROUP_KMEM
percpu_counter_init(&tcp_sockets_allocated, 0);
+#endif
percpu_counter_init(&tcp_orphan_count, 0);
tcp_hashinfo.bind_bucket_cachep =
kmem_cache_create("tcp_bind_bucket",
--
1.7.6
--
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^ permalink raw reply related
* [PATCH v2 7/9] tcp buffer limitation: per-cgroup limit
From: Glauber Costa @ 2011-09-07 4:23 UTC (permalink / raw)
To: linux-kernel
Cc: linux-mm, containers, netdev, xemul, Glauber Costa,
David S. Miller, Hiroyouki Kamezawa, Eric W. Biederman
In-Reply-To: <1315369399-3073-1-git-send-email-glommer@parallels.com>
This patch uses the "tcp_max_mem" field of the kmem_cgroup to
effectively control the amount of kernel memory pinned by a cgroup.
We have to make sure that none of the memory pressure thresholds
specified in the namespace are bigger than the current cgroup.
Signed-off-by: Glauber Costa <glommer@parallels.com>
CC: David S. Miller <davem@davemloft.net>
CC: Hiroyouki Kamezawa <kamezawa.hiroyu@jp.fujitsu.com>
CC: Eric W. Biederman <ebiederm@xmission.com>
---
include/linux/kmem_cgroup.h | 1 +
net/ipv4/sysctl_net_ipv4.c | 8 ++++++
net/ipv4/tcp.c | 56 ++++++++++++++++++++++++++++++++++++++++++-
3 files changed, 64 insertions(+), 1 deletions(-)
diff --git a/include/linux/kmem_cgroup.h b/include/linux/kmem_cgroup.h
index 89ad0a1..57a432b 100644
--- a/include/linux/kmem_cgroup.h
+++ b/include/linux/kmem_cgroup.h
@@ -26,6 +26,7 @@ struct kmem_cgroup {
#ifdef CONFIG_INET
int tcp_memory_pressure;
+ int tcp_max_memory;
atomic_long_t tcp_memory_allocated;
struct percpu_counter tcp_sockets_allocated;
long tcp_prot_mem[3];
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index 0d74b9d..5e89480 100644
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -14,6 +14,7 @@
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/nsproxy.h>
+#include <linux/kmem_cgroup.h>
#include <linux/swap.h>
#include <net/snmp.h>
#include <net/icmp.h>
@@ -181,6 +182,7 @@ static int ipv4_tcp_mem(ctl_table *ctl, int write,
{
int ret;
unsigned long vec[3];
+ struct kmem_cgroup *kmem = kcg_from_task(current);
struct net *net = current->nsproxy->net_ns;
int i;
@@ -200,7 +202,13 @@ static int ipv4_tcp_mem(ctl_table *ctl, int write,
return ret;
for (i = 0; i < 3; i++)
+ if (vec[i] > kmem->tcp_max_memory)
+ return -EINVAL;
+
+ for (i = 0; i < 3; i++) {
net->ipv4.sysctl_tcp_mem[i] = vec[i];
+ kmem->tcp_prot_mem[i] = net->ipv4.sysctl_tcp_mem[i];
+ }
return 0;
}
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 0725dc4..e1918fa 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -324,6 +324,55 @@ atomic_long_t *memory_allocated_tcp(struct kmem_cgroup *sg)
return &(sg->tcp_memory_allocated);
}
+static int tcp_write_maxmem(struct cgroup *cgrp, struct cftype *cft, u64 val)
+{
+ struct kmem_cgroup *sg = kcg_from_cgroup(cgrp);
+ struct net *net = current->nsproxy->net_ns;
+ int i;
+
+ if (!cgroup_lock_live_group(cgrp))
+ return -ENODEV;
+
+ /*
+ * We can't allow more memory than our parents. Since this
+ * will be tested for all calls, by induction, there is no need
+ * to test any parent other than our own
+ * */
+ if (sg->parent && (val > sg->parent->tcp_max_memory))
+ val = sg->parent->tcp_max_memory;
+
+ sg->tcp_max_memory = val;
+
+ for (i = 0; i < 3; i++)
+ sg->tcp_prot_mem[i] = min_t(long, val,
+ net->ipv4.sysctl_tcp_mem[i]);
+
+ cgroup_unlock();
+
+ return 0;
+}
+
+static u64 tcp_read_maxmem(struct cgroup *cgrp, struct cftype *cft)
+{
+ struct kmem_cgroup *sg = kcg_from_cgroup(cgrp);
+ u64 ret;
+
+ if (!cgroup_lock_live_group(cgrp))
+ return -ENODEV;
+ ret = sg->tcp_max_memory;
+
+ cgroup_unlock();
+ return ret;
+}
+
+static struct cftype tcp_files[] = {
+ {
+ .name = "tcp_maxmem",
+ .write_u64 = tcp_write_maxmem,
+ .read_u64 = tcp_read_maxmem,
+ },
+};
+
int tcp_init_cgroup(struct cgroup *cgrp, struct cgroup_subsys *ss)
{
struct kmem_cgroup *sg = kcg_from_cgroup(cgrp);
@@ -337,11 +386,16 @@ int tcp_init_cgroup(struct cgroup *cgrp, struct cgroup_subsys *ss)
limit = nr_free_buffer_pages() / 8;
limit = max(limit, 128UL);
+ if (sg->parent)
+ sg->tcp_max_memory = sg->parent->tcp_max_memory;
+ else
+ sg->tcp_max_memory = limit * 2;
+
sg->tcp_prot_mem[0] = net->ipv4.sysctl_tcp_mem[0];
sg->tcp_prot_mem[1] = net->ipv4.sysctl_tcp_mem[1];
sg->tcp_prot_mem[2] = net->ipv4.sysctl_tcp_mem[2];
- return 0;
+ return cgroup_add_files(cgrp, ss, tcp_files, ARRAY_SIZE(tcp_files));
}
EXPORT_SYMBOL(tcp_init_cgroup);
--
1.7.6
--
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^ permalink raw reply related
* [PATCH v2 8/9] Display current tcp memory allocation in kmem cgroup
From: Glauber Costa @ 2011-09-07 4:23 UTC (permalink / raw)
To: linux-kernel
Cc: linux-mm, containers, netdev, xemul, Glauber Costa,
David S. Miller, Hiroyouki Kamezawa, Eric W. Biederman
In-Reply-To: <1315369399-3073-1-git-send-email-glommer@parallels.com>
This patch introduces kmem.tcp_current_memory file, living in the
kmem_cgroup filesystem. It is a simple read-only file that displays the
amount of kernel memory currently consumed by the cgroup.
Signed-off-by: Glauber Costa <glommer@parallels.com>
CC: David S. Miller <davem@davemloft.net>
CC: Hiroyouki Kamezawa <kamezawa.hiroyu@jp.fujitsu.com>
CC: Eric W. Biederman <ebiederm@xmission.com>
---
net/ipv4/tcp.c | 17 +++++++++++++++++
1 files changed, 17 insertions(+), 0 deletions(-)
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index e1918fa..ff5c0e0 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -365,12 +365,29 @@ static u64 tcp_read_maxmem(struct cgroup *cgrp, struct cftype *cft)
return ret;
}
+static u64 tcp_read_curmem(struct cgroup *cgrp, struct cftype *cft)
+{
+ struct kmem_cgroup *sg = kcg_from_cgroup(cgrp);
+ u64 ret;
+
+ if (!cgroup_lock_live_group(cgrp))
+ return -ENODEV;
+ ret = atomic_long_read(&sg->tcp_memory_allocated);
+
+ cgroup_unlock();
+ return ret;
+}
+
static struct cftype tcp_files[] = {
{
.name = "tcp_maxmem",
.write_u64 = tcp_write_maxmem,
.read_u64 = tcp_read_maxmem,
},
+ {
+ .name = "tcp_current_memory",
+ .read_u64 = tcp_read_curmem,
+ },
};
int tcp_init_cgroup(struct cgroup *cgrp, struct cgroup_subsys *ss)
--
1.7.6
--
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^ permalink raw reply related
* [PATCH v2 9/9] Add documentation about kmem_cgroup
From: Glauber Costa @ 2011-09-07 4:23 UTC (permalink / raw)
To: linux-kernel
Cc: linux-mm, containers, netdev, xemul, Glauber Costa,
David S. Miller, Hiroyouki Kamezawa, Eric W. Biederman,
Randy Dunlap
In-Reply-To: <1315369399-3073-1-git-send-email-glommer@parallels.com>
Signed-off-by: Glauber Costa <glommer@parallels.com>
CC: David S. Miller <davem@davemloft.net>
CC: Hiroyouki Kamezawa <kamezawa.hiroyu@jp.fujitsu.com>
CC: Eric W. Biederman <ebiederm@xmission.com>
CC: Randy Dunlap <rdunlap@xenotime.net>
---
Documentation/cgroups/kmem_cgroups.txt | 27 +++++++++++++++++++++++++++
1 files changed, 27 insertions(+), 0 deletions(-)
create mode 100644 Documentation/cgroups/kmem_cgroups.txt
diff --git a/Documentation/cgroups/kmem_cgroups.txt b/Documentation/cgroups/kmem_cgroups.txt
new file mode 100644
index 0000000..930e069
--- /dev/null
+++ b/Documentation/cgroups/kmem_cgroups.txt
@@ -0,0 +1,27 @@
+Kernel Memory Cgroup
+====================
+
+This document briefly describes the kernel memory cgroup, or "kmem cgroup".
+Unlike user memory, kernel memory cannot be swapped. This effectively means
+that rogue processes can start operations that pin kernel objects permanently
+into memory, exhausting resources of all other processes in the system.
+
+kmem_cgroup main goal is to control the amount of memory a group of processes
+can pin at any given point in time. Other uses of this infrastructure are
+expected to come up with time. Right now, the only resource effectively limited
+are tcp send and receive buffers.
+
+TCP network buffers
+===================
+
+TCP network buffers, both on the send and receive sides, can be controlled
+by the kmem cgroup. Once a socket is created, it is attached to the cgroup of
+the controller process, where it stays until the end of its lifetime.
+
+Files
+=====
+ kmem.tcp_maxmem: control the maximum amount in bytes that can be used by
+ tcp sockets inside the cgroup.
+
+ kmem.tcp_current_memory: current amount in bytes used by all sockets in
+ this cgroup
--
1.7.6
--
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* Re: [PATCH -next v2] unix stream: Fix use-after-free crashes
From: Yan, Zheng @ 2011-09-07 4:36 UTC (permalink / raw)
To: Eric Dumazet
Cc: Tim Chen, Yan, Zheng, netdev@vger.kernel.org, davem@davemloft.net,
sfr@canb.auug.org.au, jirislaby@gmail.com, sedat.dilek@gmail.com,
alex.shi
In-Reply-To: <1315340388.3400.28.camel@edumazet-laptop>
On Wed, Sep 7, 2011 at 4:19 AM, Eric Dumazet <eric.dumazet@gmail.com> wrote:
> Le mardi 06 septembre 2011 à 12:59 -0700, Tim Chen a écrit :
>> On Tue, 2011-09-06 at 21:43 +0200, Eric Dumazet wrote:
>> > Le mardi 06 septembre 2011 à 12:33 -0700, Tim Chen a écrit :
>> >
>> > > Yes, I think locking the sendmsg for the entire duration of
>> > > unix_stream_sendmsg makes a lot of sense. It simplifies the logic a lot
>> > > more. I'll try to cook something up in the next couple of days.
>> >
>> > Thats not really possible, we cant hold a spinlock and call
>> > sock_alloc_send_skb() and/or memcpy_fromiovec(), wich might sleep.
>> >
>> > You would need to prepare the full skb list, then :
>> > - stick the ref on the last skb of the list.
>> >
>> > Transfert the whole skb list in other->sk_receive_queue in one go,
>> > instead of one after another.
>> >
>> > Unfortunately, this would break streaming (big send(), and another
>> > thread doing the receive)
>> >
>> > Listen, I am wondering why hackbench even triggers SCM code. This is
>> > really odd. We should not have a _single_ pid/cred ref/unref at all.
>> >
>>
>> Hackbench triggers the code because it has a bunch of threads sending
>> msgs on UNIX socket.
>> >
>>
>> Well, if the lock socket approach doesn't work, then my original patch
>> plus Yan Zheng's fix should still work. I'll try to answer your
>> objections below:
>>
>>
>> > I was discussing of things after proposed patch, not current net-next.
>> >
>> > This reads :
>> >
>> > err = unix_scm_to_skb(siocb->scm, skb, !fds_sent, scm_ref);
>> >
>> > So first skb is sent without ref taken, as mentioned in Changelog ?
>> >
>>
>> No. the first skb is sent *with* ref taken, as scm_ref is set to true for
>> first skb.
>>
>> >
>> > If second skb cannot be built, we exit this system call with an already
>> > queued skb. Receiver can then access to freed memory.
>> >
>>
>> No, we do have reference set. For first skb, in unix_scm_to_skb. For the
>> second skb (which is the last skb), in scm_sent. Should the second skb alloc failed,
>> we'll release the ref in scm_destroy. Otherwise, the receiver will release
>> the references will consuming the skb.
>>
>
> This is crap. This is not the intent of the code I read from the patch.
>
> unless scm_ref really means scm_noref ?
>
> I really hate this patch. I mean it.
>
> I read it 10 times, spent 2 hours and still dont understand it.
>
>
> @@ -1577,6 +1577,7 @@ static int unix_stream_sendmsg(struct kiocb *kiocb, struct socket *sock,
> int sent = 0;
> struct scm_cookie tmp_scm;
> bool fds_sent = false;
> + bool scm_ref = true;
> int max_level;
>
> if (NULL == siocb->scm)
> @@ -1637,12 +1638,15 @@ static int unix_stream_sendmsg(struct kiocb *kiocb, struct socket *sock,
> */
> size = min_t(int, size, skb_tailroom(skb));
>
> + /* pass the scm reference to the very last skb */
>
> HERE: I understand : on the last skb, set scm_ref to false.
> So comment is wrong.
I guess you misunderstood this code. Set scm_ref to false means skb will inherit
sender's reference. Then we call unix_scm_to_skb() with parameter
'ref' == false.
So it doesn't get additional reference. I admit my patch is confusing,
but I think
Tim's new patch is OK. (even in the case of fail skb allocation or
user->kernel copy)
Regards
>
> + if (sent + size >= len)
> + scm_ref = false;
>
> - /* Only send the fds and no ref to pid in the first buffer */
> - err = unix_scm_to_skb(siocb->scm, skb, !fds_sent, fds_sent);
> + /* Only send the fds in the first buffer */
> + err = unix_scm_to_skb(siocb->scm, skb, !fds_sent, scm_ref);
> if (err < 0) {
> kfree_skb(skb);
> - goto out;
> + goto out_err;
> }
>
>
>
> As I said, we should revert the buggy patch, and rewrite a performance
> fix from scratch, with not a single get_pid()/put_pid() in fast path.
>
> read()/write() on AF_UNIX sockets should not use a single
> get_pid()/put_pid().
>
> This is a serious regression we should fix at 100%, not 50% or even 75%,
> adding serious bugs.
>
>
>
> --
> To unsubscribe from this list: send the line "unsubscribe netdev" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
^ permalink raw reply
* Re: [PATCH -next v2] unix stream: Fix use-after-free crashes
From: Eric Dumazet @ 2011-09-07 5:08 UTC (permalink / raw)
To: Yan, Zheng
Cc: Tim Chen, Yan, Zheng, netdev@vger.kernel.org, davem@davemloft.net,
sfr@canb.auug.org.au, jirislaby@gmail.com, sedat.dilek@gmail.com,
alex.shi
In-Reply-To: <CAAM7YAn0c0SpAD42PcT+-HDXjT9HMajhmfZD6D68_0E21i2tSQ@mail.gmail.com>
Le mercredi 07 septembre 2011 à 12:36 +0800, Yan, Zheng a écrit :
> I guess you misunderstood this code. Set scm_ref to false means skb will inherit
> sender's reference. Then we call unix_scm_to_skb() with parameter
> 'ref' == false.
> So it doesn't get additional reference. I admit my patch is confusing,
> but I think
> Tim's new patch is OK. (even in the case of fail skb allocation or
> user->kernel copy)
>
I want to be able to review the code now, and in two or three years too,
without spending hours and hours.
Could you _please_ guys send a patch, with :
1) A good changelog : In this confusing area, this is probably more
important than actual code.
2) right logic and right variable names
I am sorry, but this is not good :
+ /* encode scm in skb and use the scm ref */
+ ref_avail = false;
+ if (sent + size < len) {
+ /* Only send the fds in the first buffer */
+ /* get additional ref if more skbs will be created */
+ err = unix_scm_to_skb(siocb->scm, skb, !fds_sent, true);
+ ref_avail = true;
+ } else
+ err = unix_scm_to_skb(siocb->scm, skb, !fds_sent, false);
^ permalink raw reply
* Re: [PATCH -next v2] unix stream: Fix use-after-free crashes
From: Yan, Zheng @ 2011-09-07 5:20 UTC (permalink / raw)
To: Eric Dumazet
Cc: Yan, Zheng, Tim Chen, netdev@vger.kernel.org, davem@davemloft.net,
sfr@canb.auug.org.au, jirislaby@gmail.com, sedat.dilek@gmail.com,
Shi, Alex
In-Reply-To: <1315372100.3400.76.camel@edumazet-laptop>
On 09/07/2011 01:08 PM, Eric Dumazet wrote:
> Le mercredi 07 septembre 2011 à 12:36 +0800, Yan, Zheng a écrit :
>
>> I guess you misunderstood this code. Set scm_ref to false means skb will inherit
>> sender's reference. Then we call unix_scm_to_skb() with parameter
>> 'ref' == false.
>> So it doesn't get additional reference. I admit my patch is confusing,
>> but I think
>> Tim's new patch is OK. (even in the case of fail skb allocation or
>> user->kernel copy)
>>
>
> I want to be able to review the code now, and in two or three years too,
> without spending hours and hours.
>
> Could you _please_ guys send a patch, with :
>
> 1) A good changelog : In this confusing area, this is probably more
> important than actual code.
Sorry for my poor English.
>
> 2) right logic and right variable names
>
> I am sorry, but this is not good :
>
> + /* encode scm in skb and use the scm ref */
> + ref_avail = false;
> + if (sent + size < len) {
> + /* Only send the fds in the first buffer */
> + /* get additional ref if more skbs will be created */
> + err = unix_scm_to_skb(siocb->scm, skb, !fds_sent, true);
> + ref_avail = true;
> + } else
> + err = unix_scm_to_skb(siocb->scm, skb, !fds_sent, false);
>
>
Is code like this OK? Thanks
---
if (sent + size < len) {
/* Only send the fds in the first buffer */
/* get additional ref if more skbs will be created */
err = unix_scm_to_skb(siocb->scm, skb, !fds_sent, true);
} else {
err = unix_scm_to_skb(siocb->scm, skb, !fds_sent, false);
ref_avail = false;
}
^ permalink raw reply
* Re: [PATCH v2 2/9] Kernel Memory cgroup
From: Paul Menage @ 2011-09-07 5:24 UTC (permalink / raw)
To: Glauber Costa
Cc: linux-kernel, linux-mm, containers, netdev, xemul,
David S. Miller, Hiroyouki Kamezawa, Eric W. Biederman
In-Reply-To: <1315369399-3073-3-git-send-email-glommer@parallels.com>
On Tue, Sep 6, 2011 at 9:23 PM, Glauber Costa <glommer@parallels.com> wrote:
> +
> +struct kmem_cgroup {
> + struct cgroup_subsys_state css;
> + struct kmem_cgroup *parent;
> +};
There's a parent pointer in css.cgroup, so you shouldn't need a
separate one here.
Most cgroup subsystems define this structure (and the below accessor
functions) in their .c file rather than exposing it to the world? Does
this subsystem particularly need it exposed?
> +
> +static struct cgroup_subsys_state *kmem_create(
> + struct cgroup_subsys *ss, struct cgroup *cgrp)
> +{
> + struct kmem_cgroup *sk = kzalloc(sizeof(*sk), GFP_KERNEL);
kcg or just cg would be a better name?
Paul
^ permalink raw reply
* Re: [PATCH v2 3/9] socket: initial cgroup code.
From: Paul Menage @ 2011-09-07 5:26 UTC (permalink / raw)
To: Glauber Costa
Cc: linux-kernel, linux-mm, containers, netdev, xemul,
David S. Miller, Hiroyouki Kamezawa, Eric W. Biederman
In-Reply-To: <1315369399-3073-4-git-send-email-glommer@parallels.com>
On Tue, Sep 6, 2011 at 9:23 PM, Glauber Costa <glommer@parallels.com> wrote:
> We aim to control the amount of kernel memory pinned at any
> time by tcp sockets. To lay the foundations for this work,
> this patch adds a pointer to the kmem_cgroup to the socket
> structure.
>
> Signed-off-by: Glauber Costa <glommer@parallels.com>
> CC: David S. Miller <davem@davemloft.net>
> CC: Hiroyouki Kamezawa <kamezawa.hiroyu@jp.fujitsu.com>
> CC: Eric W. Biederman <ebiederm@xmission.com>
> ---
> include/linux/kmem_cgroup.h | 29 +++++++++++++++++++++++++++++
> include/net/sock.h | 2 ++
> net/core/sock.c | 5 ++---
> 3 files changed, 33 insertions(+), 3 deletions(-)
>
> diff --git a/include/linux/kmem_cgroup.h b/include/linux/kmem_cgroup.h
> index 0e4a74b..77076d8 100644
> --- a/include/linux/kmem_cgroup.h
> +++ b/include/linux/kmem_cgroup.h
> @@ -49,5 +49,34 @@ static inline struct kmem_cgroup *kcg_from_task(struct task_struct *tsk)
> return NULL;
> }
> #endif /* CONFIG_CGROUP_KMEM */
> +
> +#ifdef CONFIG_INET
> +#include <net/sock.h>
> +static inline void sock_update_kmem_cgrp(struct sock *sk)
> +{
> +#ifdef CONFIG_CGROUP_KMEM
> + sk->sk_cgrp = kcg_from_task(current);
BUG_ON(sk->sk_cgrp) ? Or else release the old cgroup if necessary.
> @@ -339,6 +340,7 @@ struct sock {
> #endif
> __u32 sk_mark;
> u32 sk_classid;
> + struct kmem_cgroup *sk_cgrp;
Should this be protected by a #ifdef?
Paul
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^ permalink raw reply
* Re: [PATCH v2 2/9] Kernel Memory cgroup
From: Glauber Costa @ 2011-09-07 5:55 UTC (permalink / raw)
To: Paul Menage
Cc: linux-kernel, linux-mm, containers, netdev, xemul,
David S. Miller, Hiroyouki Kamezawa, Eric W. Biederman
In-Reply-To: <CALdu-PCosvJ-SfVROLLM29RoMfxxRyW9E-_Za9A7LTAZwmkPeg@mail.gmail.com>
On 09/07/2011 02:24 AM, Paul Menage wrote:
> On Tue, Sep 6, 2011 at 9:23 PM, Glauber Costa<glommer@parallels.com> wrote:
>> +
>> +struct kmem_cgroup {
>> + struct cgroup_subsys_state css;
>> + struct kmem_cgroup *parent;
>> +};
>
> There's a parent pointer in css.cgroup, so you shouldn't need a
> separate one here.
Ok, I missed that. Thanks
> Most cgroup subsystems define this structure (and the below accessor
> functions) in their .c file rather than exposing it to the world? Does
> this subsystem particularly need it exposed?
Originally I was using it in sock.c and friends. Now, from the last
submission to this one, most of those uses were substituted. The
acessors, however, are in kmem_cgroup.h. Reason being I want most of
them to be inline.
>> +
>> +static struct cgroup_subsys_state *kmem_create(
>> + struct cgroup_subsys *ss, struct cgroup *cgrp)
>> +{
>> + struct kmem_cgroup *sk = kzalloc(sizeof(*sk), GFP_KERNEL);
>
> kcg or just cg would be a better name?
I'll go with kcg.
--
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^ permalink raw reply
* Re: [PATCH v2 3/9] socket: initial cgroup code.
From: Glauber Costa @ 2011-09-07 5:59 UTC (permalink / raw)
To: Paul Menage
Cc: linux-kernel, linux-mm, containers, netdev, xemul,
David S. Miller, Hiroyouki Kamezawa, Eric W. Biederman
In-Reply-To: <CALdu-PCeZLnF-3zx=NU6paC41Hp+_VTN-mTt6RvXbCu7Kdk-mQ@mail.gmail.com>
On 09/07/2011 02:26 AM, Paul Menage wrote:
> On Tue, Sep 6, 2011 at 9:23 PM, Glauber Costa<glommer@parallels.com> wrote:
>> We aim to control the amount of kernel memory pinned at any
>> time by tcp sockets. To lay the foundations for this work,
>> this patch adds a pointer to the kmem_cgroup to the socket
>> structure.
>>
>> Signed-off-by: Glauber Costa<glommer@parallels.com>
>> CC: David S. Miller<davem@davemloft.net>
>> CC: Hiroyouki Kamezawa<kamezawa.hiroyu@jp.fujitsu.com>
>> CC: Eric W. Biederman<ebiederm@xmission.com>
>> ---
>> include/linux/kmem_cgroup.h | 29 +++++++++++++++++++++++++++++
>> include/net/sock.h | 2 ++
>> net/core/sock.c | 5 ++---
>> 3 files changed, 33 insertions(+), 3 deletions(-)
>>
>> diff --git a/include/linux/kmem_cgroup.h b/include/linux/kmem_cgroup.h
>> index 0e4a74b..77076d8 100644
>> --- a/include/linux/kmem_cgroup.h
>> +++ b/include/linux/kmem_cgroup.h
>> @@ -49,5 +49,34 @@ static inline struct kmem_cgroup *kcg_from_task(struct task_struct *tsk)
>> return NULL;
>> }
>> #endif /* CONFIG_CGROUP_KMEM */
>> +
>> +#ifdef CONFIG_INET
>> +#include<net/sock.h>
>> +static inline void sock_update_kmem_cgrp(struct sock *sk)
>> +{
>> +#ifdef CONFIG_CGROUP_KMEM
>> + sk->sk_cgrp = kcg_from_task(current);
>
> BUG_ON(sk->sk_cgrp) ? Or else release the old cgroup if necessary.
Since at least in this current incarnation, I am not doing migrations,
I definitely don't expect to have a pointer already present here.
BUG_ON() it is.
>> @@ -339,6 +340,7 @@ struct sock {
>> #endif
>> __u32 sk_mark;
>> u32 sk_classid;
>> + struct kmem_cgroup *sk_cgrp;
>
> Should this be protected by a #ifdef?
I don't particularly like it. I think that ifdef'ing fields
in structures, while allowing for size optimization, takes away
size and alignment predictability. But... can do.
^ permalink raw reply
* [PATCH] net/phy: add IC+ IP101A and support APS.
From: Giuseppe CAVALLARO @ 2011-09-07 6:14 UTC (permalink / raw)
To: netdev; +Cc: Giuseppe Cavallaro
This patch adds the IC+ IP101A Single port 10/100 PHY
and supports the APS (i.e. power saving mode while link is down)
for both IP1001 and IP101A (where this mode is supported).
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
---
drivers/net/phy/icplus.c | 79 +++++++++++++++++++++++++++++++++++++++------
1 files changed, 68 insertions(+), 11 deletions(-)
diff --git a/drivers/net/phy/icplus.c b/drivers/net/phy/icplus.c
index d4cbc29..6e344e5 100644
--- a/drivers/net/phy/icplus.c
+++ b/drivers/net/phy/icplus.c
@@ -30,10 +30,17 @@
#include <asm/irq.h>
#include <asm/uaccess.h>
-MODULE_DESCRIPTION("ICPlus IP175C/IC1001 PHY drivers");
+MODULE_DESCRIPTION("ICPlus IP175C/IP101A/IC1001 PHY drivers");
MODULE_AUTHOR("Michael Barkowski");
MODULE_LICENSE("GPL");
+/* IP101A/IP1001 */
+#define IP10XX_SPEC_CTRL_STATUS 16 /* Spec. Control Register */
+#define IP1001_SPEC_CTRL_STATUS_2 20 /* IP1001 Spec. Control Reg 2 */
+#define IP1001_PHASE_SEL_MASK 3 /* IP1001 RX/TXPHASE_SEL */
+#define IP1001_APS_ON 11 /* IP1001 APS Mode bit */
+#define IP101A_APS_ON 2 /* IP101A APS Mode bit */
+
static int ip175c_config_init(struct phy_device *phydev)
{
int err, i;
@@ -89,27 +96,58 @@ static int ip175c_config_init(struct phy_device *phydev)
return 0;
}
-static int ip1001_config_init(struct phy_device *phydev)
+static int ip1xx_reset(struct phy_device *phydev)
{
- int err, value;
+ int err, bmcr;
/* Software Reset PHY */
- value = phy_read(phydev, MII_BMCR);
- value |= BMCR_RESET;
- err = phy_write(phydev, MII_BMCR, value);
+ bmcr = phy_read(phydev, MII_BMCR);
+ bmcr |= BMCR_RESET;
+ err = phy_write(phydev, MII_BMCR, bmcr);
if (err < 0)
return err;
do {
- value = phy_read(phydev, MII_BMCR);
- } while (value & BMCR_RESET);
+ bmcr = phy_read(phydev, MII_BMCR);
+ } while (bmcr & BMCR_RESET);
+
+ return err;
+}
+
+static int ip1001_config_init(struct phy_device *phydev)
+{
+ int c;
+
+ c = ip1xx_reset(phydev);
+ if (c < 0)
+ return c;
+
+ /* Enable Auto Power Saving mode */
+ c = phy_read(phydev, IP1001_SPEC_CTRL_STATUS_2);
+ c |= IP1001_APS_ON;
+ if (c < 0)
+ return c;
/* Additional delay (2ns) used to adjust RX clock phase
* at GMII/ RGMII interface */
- value = phy_read(phydev, 16);
- value |= 0x3;
+ c = phy_read(phydev, IP10XX_SPEC_CTRL_STATUS);
+ c |= IP1001_PHASE_SEL_MASK;
+
+ return phy_write(phydev, IP10XX_SPEC_CTRL_STATUS, c);
+}
+
+static int ip101a_config_init(struct phy_device *phydev)
+{
+ int c;
- return phy_write(phydev, 16, value);
+ c = ip1xx_reset(phydev);
+ if (c < 0)
+ return c;
+
+ /* Enable Auto Power Saving mode */
+ c = phy_read(phydev, IP10XX_SPEC_CTRL_STATUS);
+ c |= IP101A_APS_ON;
+ return c;
}
static int ip175c_read_status(struct phy_device *phydev)
@@ -158,6 +196,20 @@ static struct phy_driver ip1001_driver = {
.driver = { .owner = THIS_MODULE,},
};
+static struct phy_driver ip101a_driver = {
+ .phy_id = 0x02430c54,
+ .name = "ICPlus IP101A",
+ .phy_id_mask = 0x0ffffff0,
+ .features = PHY_BASIC_FEATURES | SUPPORTED_Pause |
+ SUPPORTED_Asym_Pause,
+ .config_init = &ip101a_config_init,
+ .config_aneg = &genphy_config_aneg,
+ .read_status = &genphy_read_status,
+ .suspend = genphy_suspend,
+ .resume = genphy_resume,
+ .driver = { .owner = THIS_MODULE,},
+};
+
static int __init icplus_init(void)
{
int ret = 0;
@@ -166,12 +218,17 @@ static int __init icplus_init(void)
if (ret < 0)
return -ENODEV;
+ ret = phy_driver_register(&ip101a_driver);
+ if (ret < 0)
+ return -ENODEV;
+
return phy_driver_register(&ip175c_driver);
}
static void __exit icplus_exit(void)
{
phy_driver_unregister(&ip1001_driver);
+ phy_driver_unregister(&ip101a_driver);
phy_driver_unregister(&ip175c_driver);
}
--
1.7.4.4
^ permalink raw reply related
* Re: [PATCH v2 6/9] per-cgroup tcp buffers control
From: Li Zefan @ 2011-09-07 7:32 UTC (permalink / raw)
To: Glauber Costa
Cc: linux-kernel, xemul, netdev, linux-mm, Eric W. Biederman,
containers, David S. Miller
In-Reply-To: <1315369399-3073-7-git-send-email-glommer@parallels.com>
> +#ifdef CONFIG_INET
> +#include <net/sock.h>
> +static inline void sock_update_kmem_cgrp(struct sock *sk)
> +{
> +#ifdef CONFIG_CGROUP_KMEM
> + sk->sk_cgrp = kcg_from_task(current);
> +
> + /*
> + * We don't need to protect against anything task-related, because
> + * we are basically stuck with the sock pointer that won't change,
> + * even if the task that originated the socket changes cgroups.
> + *
> + * What we do have to guarantee, is that the chain leading us to
> + * the top level won't change under our noses. Incrementing the
> + * reference count via cgroup_exclude_rmdir guarantees that.
> + */
> + cgroup_exclude_rmdir(&sk->sk_cgrp->css);
> +#endif
must be protected by rcu_read_lock.
> +}
> +
> +static inline void sock_release_kmem_cgrp(struct sock *sk)
> +{
> +#ifdef CONFIG_CGROUP_KMEM
> + cgroup_release_and_wakeup_rmdir(&sk->sk_cgrp->css);
> +#endif
> +}
Ugly. Just use the way you define kcg_from_task().
> +
> +#endif /* CONFIG_INET */
> #endif /* _LINUX_KMEM_CGROUP_H */
>
> diff --git a/include/net/sock.h b/include/net/sock.h
> index 8e4062f..709382f 100644
> --- a/include/net/sock.h
> +++ b/include/net/sock.h
> @@ -228,6 +228,7 @@ struct sock_common {
> * @sk_security: used by security modules
> * @sk_mark: generic packet mark
> * @sk_classid: this socket's cgroup classid
> + * @sk_cgrp: this socket's kernel memory (kmem) cgroup
> * @sk_write_pending: a write to stream socket waits to start
> * @sk_state_change: callback to indicate change in the state of the sock
> * @sk_data_ready: callback to indicate there is data to be processed
> @@ -339,6 +340,7 @@ struct sock {
> #endif
> __u32 sk_mark;
> u32 sk_classid;
> + struct kmem_cgroup *sk_cgrp;
> void (*sk_state_change)(struct sock *sk);
> void (*sk_data_ready)(struct sock *sk, int bytes);
> void (*sk_write_space)(struct sock *sk);
> diff --git a/net/core/sock.c b/net/core/sock.c
> index 3449df8..7109864 100644
> --- a/net/core/sock.c
> +++ b/net/core/sock.c
> @@ -1139,6 +1139,7 @@ struct sock *sk_alloc(struct net *net, int family, gfp_t priority,
> atomic_set(&sk->sk_wmem_alloc, 1);
>
> sock_update_classid(sk);
> + sock_update_kmem_cgrp(sk);
> }
>
> return sk;
> @@ -1170,6 +1171,7 @@ static void __sk_free(struct sock *sk)
> put_cred(sk->sk_peer_cred);
> put_pid(sk->sk_peer_pid);
> put_net(sock_net(sk));
> + sock_release_kmem_cgrp(sk);
> sk_prot_free(sk->sk_prot_creator, sk);
> }
>
> @@ -2252,9 +2254,6 @@ void sk_common_release(struct sock *sk)
> }
> EXPORT_SYMBOL(sk_common_release);
>
> -static DEFINE_RWLOCK(proto_list_lock);
> -static LIST_HEAD(proto_list);
> -
compile error.
you should do compile test after each single patch.
> #ifdef CONFIG_PROC_FS
> #define PROTO_INUSE_NR 64 /* should be enough for the first time */
> struct prot_inuse {
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^ permalink raw reply
* [PATCH 39/62] ISDN: irq: Remove IRQF_DISABLED
From: Yong Zhang @ 2011-09-07 8:10 UTC (permalink / raw)
To: linux-kernel
Cc: tglx, mingo, Armin Schindler, Karsten Keil, Yong Zhang, netdev
In-Reply-To: <1315383059-3673-1-git-send-email-yong.zhang0@gmail.com>
This flag is a NOOP and can be removed now.
Signed-off-by: Yong Zhang <yong.zhang0@gmail.com>
---
drivers/isdn/hardware/eicon/divasmain.c | 2 +-
drivers/isdn/sc/init.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/isdn/hardware/eicon/divasmain.c b/drivers/isdn/hardware/eicon/divasmain.c
index f332b60..8a0a831 100644
--- a/drivers/isdn/hardware/eicon/divasmain.c
+++ b/drivers/isdn/hardware/eicon/divasmain.c
@@ -481,7 +481,7 @@ void __inline__ outpp(void __iomem *addr, word p)
int diva_os_register_irq(void *context, byte irq, const char *name)
{
int result = request_irq(irq, diva_os_irq_wrapper,
- IRQF_DISABLED | IRQF_SHARED, name, context);
+ IRQF_SHARED, name, context);
return (result);
}
diff --git a/drivers/isdn/sc/init.c b/drivers/isdn/sc/init.c
index ca710ab..a3127fb 100644
--- a/drivers/isdn/sc/init.c
+++ b/drivers/isdn/sc/init.c
@@ -336,7 +336,7 @@ static int __init sc_init(void)
*/
sc_adapter[cinst]->interrupt = irq[b];
if (request_irq(sc_adapter[cinst]->interrupt, interrupt_handler,
- IRQF_DISABLED, interface->id,
+ 0, interface->id,
(void *)(unsigned long) cinst))
{
kfree(sc_adapter[cinst]->channel);
--
1.7.4.1
^ permalink raw reply related
* [PATCH 45/62] net: irq: Remove IRQF_DISABLED
From: Yong Zhang @ 2011-09-07 8:10 UTC (permalink / raw)
To: linux-kernel
Cc: Jaroslav Kysela, David Howells, Philip Rakity, netdev,
Christian Lamparter, Sonic Zhang, Klaus Kudielka, Thomas Sailer,
Kevin Hilman, Eric Dumazet, Johan Hovold, Cyril Chemparathy,
Russell King, mingo, Jean-Paul Roubelat, Alexey Dobriyan,
Joerg Reuter, cbe-oss-dev, Javier Martinez Canillas, Samuel Ortiz,
Mike Frysinger, Grant Grundler, Yong Zhang, Tobias Klauser, Luca
In-Reply-To: <1315383059-3673-1-git-send-email-yong.zhang0@gmail.com>
This flag is a NOOP and can be removed now.
Signed-off-by: Yong Zhang <yong.zhang0@gmail.com>
---
drivers/net/bcm63xx_enet.c | 4 ++--
drivers/net/bfin_mac.c | 4 ++--
drivers/net/davinci_emac.c | 2 +-
drivers/net/ehea/ehea_main.c | 6 +++---
drivers/net/fec.c | 2 +-
drivers/net/hamradio/baycom_ser_fdx.c | 2 +-
drivers/net/hamradio/baycom_ser_hdx.c | 2 +-
drivers/net/hamradio/scc.c | 2 +-
drivers/net/hamradio/yam.c | 2 +-
drivers/net/hp100.c | 2 +-
drivers/net/irda/bfin_sir.c | 4 ++--
drivers/net/irda/donauboe.c | 4 ++--
drivers/net/irda/sh_irda.c | 2 +-
drivers/net/irda/sh_sir.c | 2 +-
drivers/net/jazzsonic.c | 2 +-
drivers/net/korina.c | 8 ++++----
drivers/net/ks8851_mll.c | 2 +-
drivers/net/lantiq_etop.c | 4 ++--
drivers/net/pasemi_mac.c | 4 ++--
drivers/net/ps3_gelic_net.c | 2 +-
drivers/net/pxa168_eth.c | 2 +-
drivers/net/smc91x.h | 2 +-
drivers/net/smsc9420.c | 2 +-
drivers/net/sun3lance.c | 2 +-
drivers/net/tulip/de4x5.c | 2 +-
drivers/net/wan/hostess_sv11.c | 2 +-
drivers/net/wan/sealevel.c | 2 +-
drivers/net/wireless/p54/p54spi.c | 2 +-
drivers/net/xtsonic.c | 2 +-
include/net/irda/irda_device.h | 2 +-
30 files changed, 41 insertions(+), 41 deletions(-)
diff --git a/drivers/net/bcm63xx_enet.c b/drivers/net/bcm63xx_enet.c
index 1d9b985..24f57b5 100644
--- a/drivers/net/bcm63xx_enet.c
+++ b/drivers/net/bcm63xx_enet.c
@@ -840,13 +840,13 @@ static int bcm_enet_open(struct net_device *dev)
if (ret)
goto out_phy_disconnect;
- ret = request_irq(priv->irq_rx, bcm_enet_isr_dma, IRQF_DISABLED,
+ ret = request_irq(priv->irq_rx, bcm_enet_isr_dma, 0,
dev->name, dev);
if (ret)
goto out_freeirq;
ret = request_irq(priv->irq_tx, bcm_enet_isr_dma,
- IRQF_DISABLED, dev->name, dev);
+ 0, dev->name, dev);
if (ret)
goto out_freeirq_rx;
diff --git a/drivers/net/bfin_mac.c b/drivers/net/bfin_mac.c
index 6c019e1..765b7df 100644
--- a/drivers/net/bfin_mac.c
+++ b/drivers/net/bfin_mac.c
@@ -531,7 +531,7 @@ static int bfin_mac_ethtool_setwol(struct net_device *dev,
if (lp->wol && !lp->irq_wake_requested) {
/* register wake irq handler */
rc = request_irq(IRQ_MAC_WAKEDET, bfin_mac_wake_interrupt,
- IRQF_DISABLED, "EMAC_WAKE", dev);
+ 0, "EMAC_WAKE", dev);
if (rc)
return rc;
lp->irq_wake_requested = true;
@@ -1544,7 +1544,7 @@ static int __devinit bfin_mac_probe(struct platform_device *pdev)
/* now, enable interrupts */
/* register irq handler */
rc = request_irq(IRQ_MAC_RX, bfin_mac_interrupt,
- IRQF_DISABLED, "EMAC_RX", ndev);
+ 0, "EMAC_RX", ndev);
if (rc) {
dev_err(&pdev->dev, "Cannot request Blackfin MAC RX IRQ!\n");
rc = -EBUSY;
diff --git a/drivers/net/davinci_emac.c b/drivers/net/davinci_emac.c
index 3f451e4..7373ab1 100644
--- a/drivers/net/davinci_emac.c
+++ b/drivers/net/davinci_emac.c
@@ -1553,7 +1553,7 @@ static int emac_dev_open(struct net_device *ndev)
while ((res = platform_get_resource(priv->pdev, IORESOURCE_IRQ, k))) {
for (i = res->start; i <= res->end; i++) {
- if (request_irq(i, emac_irq, IRQF_DISABLED,
+ if (request_irq(i, emac_irq, 0,
ndev->name, ndev))
goto rollback;
}
diff --git a/drivers/net/ehea/ehea_main.c b/drivers/net/ehea/ehea_main.c
index be2cb4a..053327e 100644
--- a/drivers/net/ehea/ehea_main.c
+++ b/drivers/net/ehea/ehea_main.c
@@ -1340,7 +1340,7 @@ static int ehea_reg_interrupts(struct net_device *dev)
ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
ehea_qp_aff_irq_handler,
- IRQF_DISABLED, port->int_aff_name, port);
+ 0, port->int_aff_name, port);
if (ret) {
netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
port->qp_eq->attr.ist1);
@@ -1358,7 +1358,7 @@ static int ehea_reg_interrupts(struct net_device *dev)
"%s-queue%d", dev->name, i);
ret = ibmebus_request_irq(pr->eq->attr.ist1,
ehea_recv_irq_handler,
- IRQF_DISABLED, pr->int_send_name,
+ 0, pr->int_send_name,
pr);
if (ret) {
netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
@@ -3513,7 +3513,7 @@ static int __devinit ehea_probe_adapter(struct platform_device *dev,
(unsigned long)adapter);
ret = ibmebus_request_irq(adapter->neq->attr.ist1,
- ehea_interrupt_neq, IRQF_DISABLED,
+ ehea_interrupt_neq, 0,
"ehea_neq", adapter);
if (ret) {
dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
diff --git a/drivers/net/fec.c b/drivers/net/fec.c
index e8266cc..0da5346 100644
--- a/drivers/net/fec.c
+++ b/drivers/net/fec.c
@@ -1508,7 +1508,7 @@ fec_probe(struct platform_device *pdev)
irq = platform_get_irq(pdev, i);
if (i && irq < 0)
break;
- ret = request_irq(irq, fec_enet_interrupt, IRQF_DISABLED, pdev->name, ndev);
+ ret = request_irq(irq, fec_enet_interrupt, 0, pdev->name, ndev);
if (ret) {
while (--i >= 0) {
irq = platform_get_irq(pdev, i);
diff --git a/drivers/net/hamradio/baycom_ser_fdx.c b/drivers/net/hamradio/baycom_ser_fdx.c
index a974727..636b65c 100644
--- a/drivers/net/hamradio/baycom_ser_fdx.c
+++ b/drivers/net/hamradio/baycom_ser_fdx.c
@@ -445,7 +445,7 @@ static int ser12_open(struct net_device *dev)
outb(0, FCR(dev->base_addr)); /* disable FIFOs */
outb(0x0d, MCR(dev->base_addr));
outb(0, IER(dev->base_addr));
- if (request_irq(dev->irq, ser12_interrupt, IRQF_DISABLED | IRQF_SHARED,
+ if (request_irq(dev->irq, ser12_interrupt, IRQF_SHARED,
"baycom_ser_fdx", dev)) {
release_region(dev->base_addr, SER12_EXTENT);
return -EBUSY;
diff --git a/drivers/net/hamradio/baycom_ser_hdx.c b/drivers/net/hamradio/baycom_ser_hdx.c
index e349d86..f9a8976 100644
--- a/drivers/net/hamradio/baycom_ser_hdx.c
+++ b/drivers/net/hamradio/baycom_ser_hdx.c
@@ -490,7 +490,7 @@ static int ser12_open(struct net_device *dev)
outb(0, FCR(dev->base_addr)); /* disable FIFOs */
outb(0x0d, MCR(dev->base_addr));
outb(0, IER(dev->base_addr));
- if (request_irq(dev->irq, ser12_interrupt, IRQF_DISABLED | IRQF_SHARED,
+ if (request_irq(dev->irq, ser12_interrupt, IRQF_SHARED,
"baycom_ser12", dev)) {
release_region(dev->base_addr, SER12_EXTENT);
return -EBUSY;
diff --git a/drivers/net/hamradio/scc.c b/drivers/net/hamradio/scc.c
index 3365581..f432f32 100644
--- a/drivers/net/hamradio/scc.c
+++ b/drivers/net/hamradio/scc.c
@@ -1735,7 +1735,7 @@ static int scc_net_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
if (!Ivec[hwcfg.irq].used && hwcfg.irq)
{
if (request_irq(hwcfg.irq, scc_isr,
- IRQF_DISABLED, "AX.25 SCC",
+ 0, "AX.25 SCC",
(void *)(long) hwcfg.irq))
printk(KERN_WARNING "z8530drv: warning, cannot get IRQ %d\n", hwcfg.irq);
else
diff --git a/drivers/net/hamradio/yam.c b/drivers/net/hamradio/yam.c
index 96a98d2..9d60f06 100644
--- a/drivers/net/hamradio/yam.c
+++ b/drivers/net/hamradio/yam.c
@@ -890,7 +890,7 @@ static int yam_open(struct net_device *dev)
goto out_release_base;
}
outb(0, IER(dev->base_addr));
- if (request_irq(dev->irq, yam_interrupt, IRQF_DISABLED | IRQF_SHARED, dev->name, dev)) {
+ if (request_irq(dev->irq, yam_interrupt, IRQF_SHARED, dev->name, dev)) {
printk(KERN_ERR "%s: irq %d busy\n", dev->name, dev->irq);
ret = -EBUSY;
goto out_release_base;
diff --git a/drivers/net/hp100.c b/drivers/net/hp100.c
index b6519c1..e3b7c1d 100644
--- a/drivers/net/hp100.c
+++ b/drivers/net/hp100.c
@@ -1097,7 +1097,7 @@ static int hp100_open(struct net_device *dev)
/* New: if bus is PCI or EISA, interrupts might be shared interrupts */
if (request_irq(dev->irq, hp100_interrupt,
lp->bus == HP100_BUS_PCI || lp->bus ==
- HP100_BUS_EISA ? IRQF_SHARED : IRQF_DISABLED,
+ HP100_BUS_EISA ? IRQF_SHARED : 0,
"hp100", dev)) {
printk("hp100: %s: unable to get IRQ %d\n", dev->name, dev->irq);
return -EAGAIN;
diff --git a/drivers/net/irda/bfin_sir.c b/drivers/net/irda/bfin_sir.c
index 9d4ce1a..529317b 100644
--- a/drivers/net/irda/bfin_sir.c
+++ b/drivers/net/irda/bfin_sir.c
@@ -410,12 +410,12 @@ static int bfin_sir_startup(struct bfin_sir_port *port, struct net_device *dev)
#else
- if (request_irq(port->irq, bfin_sir_rx_int, IRQF_DISABLED, "BFIN_SIR_RX", dev)) {
+ if (request_irq(port->irq, bfin_sir_rx_int, 0, "BFIN_SIR_RX", dev)) {
dev_warn(&dev->dev, "Unable to attach SIR RX interrupt\n");
return -EBUSY;
}
- if (request_irq(port->irq+1, bfin_sir_tx_int, IRQF_DISABLED, "BFIN_SIR_TX", dev)) {
+ if (request_irq(port->irq+1, bfin_sir_tx_int, 0, "BFIN_SIR_TX", dev)) {
dev_warn(&dev->dev, "Unable to attach SIR TX interrupt\n");
free_irq(port->irq, dev);
return -EBUSY;
diff --git a/drivers/net/irda/donauboe.c b/drivers/net/irda/donauboe.c
index b45b2cc..04e4528 100644
--- a/drivers/net/irda/donauboe.c
+++ b/drivers/net/irda/donauboe.c
@@ -1353,7 +1353,7 @@ toshoboe_net_open (struct net_device *dev)
return 0;
rc = request_irq (self->io.irq, toshoboe_interrupt,
- IRQF_SHARED | IRQF_DISABLED, dev->name, self);
+ IRQF_SHARED, dev->name, self);
if (rc)
return rc;
@@ -1560,7 +1560,7 @@ toshoboe_open (struct pci_dev *pci_dev, const struct pci_device_id *pdid)
self->io.fir_base = self->base;
self->io.fir_ext = OBOE_IO_EXTENT;
self->io.irq = pci_dev->irq;
- self->io.irqflags = IRQF_SHARED | IRQF_DISABLED;
+ self->io.irqflags = IRQF_SHARED;
self->speed = self->io.speed = 9600;
self->async = 0;
diff --git a/drivers/net/irda/sh_irda.c b/drivers/net/irda/sh_irda.c
index 8266067..2b23e0b 100644
--- a/drivers/net/irda/sh_irda.c
+++ b/drivers/net/irda/sh_irda.c
@@ -810,7 +810,7 @@ static int __devinit sh_irda_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, ndev);
- if (request_irq(irq, sh_irda_irq, IRQF_DISABLED, "sh_irda", self)) {
+ if (request_irq(irq, sh_irda_irq, 0, "sh_irda", self)) {
dev_warn(&pdev->dev, "Unable to attach sh_irda interrupt\n");
goto err_mem_4;
}
diff --git a/drivers/net/irda/sh_sir.c b/drivers/net/irda/sh_sir.c
index ed7d7d6..d5575f7 100644
--- a/drivers/net/irda/sh_sir.c
+++ b/drivers/net/irda/sh_sir.c
@@ -761,7 +761,7 @@ static int __devinit sh_sir_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, ndev);
- if (request_irq(irq, sh_sir_irq, IRQF_DISABLED, "sh_sir", self)) {
+ if (request_irq(irq, sh_sir_irq, 0, "sh_sir", self)) {
dev_warn(&pdev->dev, "Unable to attach sh_sir interrupt\n");
goto err_mem_4;
}
diff --git a/drivers/net/jazzsonic.c b/drivers/net/jazzsonic.c
index 949c1f9..363d71c 100644
--- a/drivers/net/jazzsonic.c
+++ b/drivers/net/jazzsonic.c
@@ -84,7 +84,7 @@ static int jazzsonic_open(struct net_device* dev)
{
int retval;
- retval = request_irq(dev->irq, sonic_interrupt, IRQF_DISABLED,
+ retval = request_irq(dev->irq, sonic_interrupt, 0,
"sonic", dev);
if (retval) {
printk(KERN_ERR "%s: unable to get IRQ %d.\n",
diff --git a/drivers/net/korina.c b/drivers/net/korina.c
index 763844c..b78c4b9 100644
--- a/drivers/net/korina.c
+++ b/drivers/net/korina.c
@@ -1002,14 +1002,14 @@ static int korina_open(struct net_device *dev)
* that handles the Done Finished
* Ovr and Und Events */
ret = request_irq(lp->rx_irq, korina_rx_dma_interrupt,
- IRQF_DISABLED, "Korina ethernet Rx", dev);
+ 0, "Korina ethernet Rx", dev);
if (ret < 0) {
printk(KERN_ERR "%s: unable to get Rx DMA IRQ %d\n",
dev->name, lp->rx_irq);
goto err_release;
}
ret = request_irq(lp->tx_irq, korina_tx_dma_interrupt,
- IRQF_DISABLED, "Korina ethernet Tx", dev);
+ 0, "Korina ethernet Tx", dev);
if (ret < 0) {
printk(KERN_ERR "%s: unable to get Tx DMA IRQ %d\n",
dev->name, lp->tx_irq);
@@ -1018,7 +1018,7 @@ static int korina_open(struct net_device *dev)
/* Install handler for overrun error. */
ret = request_irq(lp->ovr_irq, korina_ovr_interrupt,
- IRQF_DISABLED, "Ethernet Overflow", dev);
+ 0, "Ethernet Overflow", dev);
if (ret < 0) {
printk(KERN_ERR "%s: unable to get OVR IRQ %d\n",
dev->name, lp->ovr_irq);
@@ -1027,7 +1027,7 @@ static int korina_open(struct net_device *dev)
/* Install handler for underflow error. */
ret = request_irq(lp->und_irq, korina_und_interrupt,
- IRQF_DISABLED, "Ethernet Underflow", dev);
+ 0, "Ethernet Underflow", dev);
if (ret < 0) {
printk(KERN_ERR "%s: unable to get UND IRQ %d\n",
dev->name, lp->und_irq);
diff --git a/drivers/net/ks8851_mll.c b/drivers/net/ks8851_mll.c
index d19c849..a6b427b 100644
--- a/drivers/net/ks8851_mll.c
+++ b/drivers/net/ks8851_mll.c
@@ -899,7 +899,7 @@ static int ks_net_open(struct net_device *netdev)
struct ks_net *ks = netdev_priv(netdev);
int err;
-#define KS_INT_FLAGS (IRQF_DISABLED|IRQF_TRIGGER_LOW)
+#define KS_INT_FLAGS (IRQF_TRIGGER_LOW)
/* lock the card, even if we may not actually do anything
* else at the moment.
*/
diff --git a/drivers/net/lantiq_etop.c b/drivers/net/lantiq_etop.c
index 45f252b..4f69e57 100644
--- a/drivers/net/lantiq_etop.c
+++ b/drivers/net/lantiq_etop.c
@@ -280,7 +280,7 @@ ltq_etop_hw_init(struct net_device *dev)
if (IS_TX(i)) {
ltq_dma_alloc_tx(&ch->dma);
- request_irq(irq, ltq_etop_dma_irq, IRQF_DISABLED,
+ request_irq(irq, ltq_etop_dma_irq, 0,
"etop_tx", priv);
} else if (IS_RX(i)) {
ltq_dma_alloc_rx(&ch->dma);
@@ -289,7 +289,7 @@ ltq_etop_hw_init(struct net_device *dev)
if (ltq_etop_alloc_skb(ch))
return -ENOMEM;
ch->dma.desc = 0;
- request_irq(irq, ltq_etop_dma_irq, IRQF_DISABLED,
+ request_irq(irq, ltq_etop_dma_irq, 0,
"etop_rx", priv);
}
ch->dma.irq = irq;
diff --git a/drivers/net/pasemi_mac.c b/drivers/net/pasemi_mac.c
index 9ec112c..dc58485 100644
--- a/drivers/net/pasemi_mac.c
+++ b/drivers/net/pasemi_mac.c
@@ -1218,7 +1218,7 @@ static int pasemi_mac_open(struct net_device *dev)
snprintf(mac->tx_irq_name, sizeof(mac->tx_irq_name), "%s tx",
dev->name);
- ret = request_irq(mac->tx->chan.irq, pasemi_mac_tx_intr, IRQF_DISABLED,
+ ret = request_irq(mac->tx->chan.irq, pasemi_mac_tx_intr, 0,
mac->tx_irq_name, mac->tx);
if (ret) {
dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
@@ -1229,7 +1229,7 @@ static int pasemi_mac_open(struct net_device *dev)
snprintf(mac->rx_irq_name, sizeof(mac->rx_irq_name), "%s rx",
dev->name);
- ret = request_irq(mac->rx->chan.irq, pasemi_mac_rx_intr, IRQF_DISABLED,
+ ret = request_irq(mac->rx->chan.irq, pasemi_mac_rx_intr, 0,
mac->rx_irq_name, mac->rx);
if (ret) {
dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
diff --git a/drivers/net/ps3_gelic_net.c b/drivers/net/ps3_gelic_net.c
index d82a82d..aaa79f5 100644
--- a/drivers/net/ps3_gelic_net.c
+++ b/drivers/net/ps3_gelic_net.c
@@ -1732,7 +1732,7 @@ static int __devinit ps3_gelic_driver_probe(struct ps3_system_bus_device *dev)
goto fail_alloc_irq;
}
result = request_irq(card->irq, gelic_card_interrupt,
- IRQF_DISABLED, netdev->name, card);
+ 0, netdev->name, card);
if (result) {
dev_info(ctodev(card), "%s:request_irq failed (%d)\n",
diff --git a/drivers/net/pxa168_eth.c b/drivers/net/pxa168_eth.c
index 1a3033d..8abc407 100644
--- a/drivers/net/pxa168_eth.c
+++ b/drivers/net/pxa168_eth.c
@@ -1131,7 +1131,7 @@ static int pxa168_eth_open(struct net_device *dev)
int err;
err = request_irq(dev->irq, pxa168_eth_int_handler,
- IRQF_DISABLED, dev->name, dev);
+ 0, dev->name, dev);
if (err) {
dev_printk(KERN_ERR, &dev->dev, "can't assign irq\n");
return -EAGAIN;
diff --git a/drivers/net/smc91x.h b/drivers/net/smc91x.h
index 5f53fbb..e6319f5 100644
--- a/drivers/net/smc91x.h
+++ b/drivers/net/smc91x.h
@@ -271,7 +271,7 @@ static inline void mcf_outsw(void *a, unsigned char *p, int l)
#define SMC_insw(a, r, p, l) mcf_insw(a + r, p, l)
#define SMC_outsw(a, r, p, l) mcf_outsw(a + r, p, l)
-#define SMC_IRQ_FLAGS (IRQF_DISABLED)
+#define SMC_IRQ_FLAGS (0)
#else
diff --git a/drivers/net/smsc9420.c b/drivers/net/smsc9420.c
index 459726f..25ae3f1 100644
--- a/drivers/net/smsc9420.c
+++ b/drivers/net/smsc9420.c
@@ -1359,7 +1359,7 @@ static int smsc9420_open(struct net_device *dev)
smsc9420_reg_write(pd, INT_STAT, 0xFFFFFFFF);
smsc9420_pci_flush_write(pd);
- if (request_irq(dev->irq, smsc9420_isr, IRQF_SHARED | IRQF_DISABLED,
+ if (request_irq(dev->irq, smsc9420_isr, IRQF_SHARED,
DRV_NAME, pd)) {
smsc_warn(IFUP, "Unable to use IRQ = %d", dev->irq);
result = -ENODEV;
diff --git a/drivers/net/sun3lance.c b/drivers/net/sun3lance.c
index 7d9ec23..2a749a7 100644
--- a/drivers/net/sun3lance.c
+++ b/drivers/net/sun3lance.c
@@ -358,7 +358,7 @@ static int __init lance_probe( struct net_device *dev)
REGA(CSR0) = CSR0_STOP;
- if (request_irq(LANCE_IRQ, lance_interrupt, IRQF_DISABLED, "SUN3 Lance", dev) < 0) {
+ if (request_irq(LANCE_IRQ, lance_interrupt, 0, "SUN3 Lance", dev) < 0) {
#ifdef CONFIG_SUN3
iounmap((void __iomem *)ioaddr);
#endif
diff --git a/drivers/net/tulip/de4x5.c b/drivers/net/tulip/de4x5.c
index 959b410..7b230b4 100644
--- a/drivers/net/tulip/de4x5.c
+++ b/drivers/net/tulip/de4x5.c
@@ -1321,7 +1321,7 @@ de4x5_open(struct net_device *dev)
if (request_irq(dev->irq, de4x5_interrupt, IRQF_SHARED,
lp->adapter_name, dev)) {
printk("de4x5_open(): Requested IRQ%d is busy - attemping FAST/SHARE...", dev->irq);
- if (request_irq(dev->irq, de4x5_interrupt, IRQF_DISABLED | IRQF_SHARED,
+ if (request_irq(dev->irq, de4x5_interrupt, IRQF_SHARED,
lp->adapter_name, dev)) {
printk("\n Cannot get IRQ- reconfigure your hardware.\n");
disable_ast(dev);
diff --git a/drivers/net/wan/hostess_sv11.c b/drivers/net/wan/hostess_sv11.c
index 3d80e42..3d74166 100644
--- a/drivers/net/wan/hostess_sv11.c
+++ b/drivers/net/wan/hostess_sv11.c
@@ -220,7 +220,7 @@ static struct z8530_dev *sv11_init(int iobase, int irq)
/* We want a fast IRQ for this device. Actually we'd like an even faster
IRQ ;) - This is one driver RtLinux is made for */
- if (request_irq(irq, z8530_interrupt, IRQF_DISABLED,
+ if (request_irq(irq, z8530_interrupt, 0,
"Hostess SV11", sv) < 0) {
pr_warn("IRQ %d already in use\n", irq);
goto err_irq;
diff --git a/drivers/net/wan/sealevel.c b/drivers/net/wan/sealevel.c
index 0b4fd05..6027e47 100644
--- a/drivers/net/wan/sealevel.c
+++ b/drivers/net/wan/sealevel.c
@@ -266,7 +266,7 @@ static __init struct slvl_board *slvl_init(int iobase, int irq,
/* We want a fast IRQ for this device. Actually we'd like an even faster
IRQ ;) - This is one driver RtLinux is made for */
- if (request_irq(irq, z8530_interrupt, IRQF_DISABLED,
+ if (request_irq(irq, z8530_interrupt, 0,
"SeaLevel", dev) < 0) {
pr_warn("IRQ %d already in use\n", irq);
goto err_request_irq;
diff --git a/drivers/net/wireless/p54/p54spi.c b/drivers/net/wireless/p54/p54spi.c
index 6d9204fe..1ebc5e5 100644
--- a/drivers/net/wireless/p54/p54spi.c
+++ b/drivers/net/wireless/p54/p54spi.c
@@ -642,7 +642,7 @@ static int __devinit p54spi_probe(struct spi_device *spi)
gpio_direction_input(p54spi_gpio_irq);
ret = request_irq(gpio_to_irq(p54spi_gpio_irq),
- p54spi_interrupt, IRQF_DISABLED, "p54spi",
+ p54spi_interrupt, 0, "p54spi",
priv->spi);
if (ret < 0) {
dev_err(&priv->spi->dev, "request_irq() failed");
diff --git a/drivers/net/xtsonic.c b/drivers/net/xtsonic.c
index 9f12026..cc4876f 100644
--- a/drivers/net/xtsonic.c
+++ b/drivers/net/xtsonic.c
@@ -95,7 +95,7 @@ static int xtsonic_open(struct net_device *dev)
{
int retval;
- retval = request_irq(dev->irq, sonic_interrupt, IRQF_DISABLED,
+ retval = request_irq(dev->irq, sonic_interrupt, 0,
"sonic", dev);
if (retval) {
printk(KERN_ERR "%s: unable to get IRQ %d.\n",
diff --git a/include/net/irda/irda_device.h b/include/net/irda/irda_device.h
index 94c852d..1141747 100644
--- a/include/net/irda/irda_device.h
+++ b/include/net/irda/irda_device.h
@@ -162,7 +162,7 @@ typedef struct {
int irq, irq2; /* Interrupts used */
int dma, dma2; /* DMA channel(s) used */
int fifo_size; /* FIFO size */
- int irqflags; /* interrupt flags (ie, IRQF_SHARED|IRQF_DISABLED) */
+ int irqflags; /* interrupt flags (ie, IRQF_SHARED) */
int direction; /* Link direction, used by some FIR drivers */
int enabled; /* Powered on? */
int suspended; /* Suspended by APM */
--
1.7.4.1
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