On Tue, Oct 7, 2014 at 5:33 AM, Michal Hocko wrote:
> On Fri 03-10-14 11:16:31, Cong Wang wrote:
>> I am sorry to confuse you that it is my the above test case which caused
>> this bug. No, we saw this bug in *production* in our data center, it happened
>> on 30+ machines!! :) The above insane
On Tue, Oct 7, 2014 at 5:33 AM, Michal Hocko mho...@suse.cz wrote:
On Fri 03-10-14 11:16:31, Cong Wang wrote:
I am sorry to confuse you that it is my the above test case which caused
this bug. No, we saw this bug in *production* in our data center, it happened
on 30+ machines!! :) The above
On Fri 03-10-14 11:16:31, Cong Wang wrote:
> On Fri, Oct 3, 2014 at 8:37 AM, Michal Hocko wrote:
> > On Thu 02-10-14 14:04:08, Cong Wang wrote:
> >> Hello again,
> >>
> >> I realized it is a series of patch actually:
> >>
> >> 3812c8c8f3953921ef18544110dafc3505c1ac62 mm: memcg: do not trap
> >>
On Fri 03-10-14 11:03:30, Cong Wang wrote:
> On Fri, Oct 3, 2014 at 8:13 AM, Michal Hocko wrote:
> >
> > That commit fixes an OOM deadlock. Not a soft lockup. Do you have the
> > OOM killer report from the log? This would tell us that the killed task
> > was indeed sleeping on the lock which is
On Fri 03-10-14 11:03:30, Cong Wang wrote:
On Fri, Oct 3, 2014 at 8:13 AM, Michal Hocko mho...@suse.cz wrote:
That commit fixes an OOM deadlock. Not a soft lockup. Do you have the
OOM killer report from the log? This would tell us that the killed task
was indeed sleeping on the lock which
On Fri 03-10-14 11:16:31, Cong Wang wrote:
On Fri, Oct 3, 2014 at 8:37 AM, Michal Hocko mho...@suse.cz wrote:
On Thu 02-10-14 14:04:08, Cong Wang wrote:
Hello again,
I realized it is a series of patch actually:
3812c8c8f3953921ef18544110dafc3505c1ac62 mm: memcg: do not trap
chargers
On Fri, Oct 3, 2014 at 11:16 AM, Cong Wang wrote:
>
> Why not? OOM killer tries to kill a process sleeping on a mutex it already
> holds, why not a deadlock? Given the fact that both are lots of inode mutex
> hung because of OOM, I am 90% sure they are the same.
>
I backported these patches to
On Fri, Oct 3, 2014 at 8:37 AM, Michal Hocko wrote:
> On Thu 02-10-14 14:04:08, Cong Wang wrote:
>> Hello again,
>>
>> I realized it is a series of patch actually:
>>
>> 3812c8c8f3953921ef18544110dafc3505c1ac62 mm: memcg: do not trap
>> chargers with full callstack on OOM
>>
On Fri, Oct 3, 2014 at 8:13 AM, Michal Hocko wrote:
>
> That commit fixes an OOM deadlock. Not a soft lockup. Do you have the
> OOM killer report from the log? This would tell us that the killed task
> was indeed sleeping on the lock which is hold by the charger which
> triggered the OOM. I am
On Thu 02-10-14 14:04:08, Cong Wang wrote:
> Hello again,
>
> I realized it is a series of patch actually:
>
> 3812c8c8f3953921ef18544110dafc3505c1ac62 mm: memcg: do not trap
> chargers with full callstack on OOM
> fb2a6fc56be66c169f8b80e07ed999ba453a2db2 mm: memcg: rework and
> document OOM
On Tue 30-09-14 10:14:08, Cong Wang wrote:
> On Tue, Sep 30, 2014 at 1:16 AM, Michal Hocko wrote:
> > On Mon 29-09-14 20:43:46, Cong Wang wrote:
> >> Hi, Johannes and Greg
> >>
> >>
> >> Please consider to backport the following commit to stable kernels < 3.12.
> >>
> >> commit
On Tue 30-09-14 10:14:08, Cong Wang wrote:
On Tue, Sep 30, 2014 at 1:16 AM, Michal Hocko mho...@suse.cz wrote:
On Mon 29-09-14 20:43:46, Cong Wang wrote:
Hi, Johannes and Greg
Please consider to backport the following commit to stable kernels 3.12.
commit
On Thu 02-10-14 14:04:08, Cong Wang wrote:
Hello again,
I realized it is a series of patch actually:
3812c8c8f3953921ef18544110dafc3505c1ac62 mm: memcg: do not trap
chargers with full callstack on OOM
fb2a6fc56be66c169f8b80e07ed999ba453a2db2 mm: memcg: rework and
document OOM waiting and
On Fri, Oct 3, 2014 at 8:13 AM, Michal Hocko mho...@suse.cz wrote:
That commit fixes an OOM deadlock. Not a soft lockup. Do you have the
OOM killer report from the log? This would tell us that the killed task
was indeed sleeping on the lock which is hold by the charger which
triggered the
On Fri, Oct 3, 2014 at 8:37 AM, Michal Hocko mho...@suse.cz wrote:
On Thu 02-10-14 14:04:08, Cong Wang wrote:
Hello again,
I realized it is a series of patch actually:
3812c8c8f3953921ef18544110dafc3505c1ac62 mm: memcg: do not trap
chargers with full callstack on OOM
On Fri, Oct 3, 2014 at 11:16 AM, Cong Wang xiyou.wangc...@gmail.com wrote:
Why not? OOM killer tries to kill a process sleeping on a mutex it already
holds, why not a deadlock? Given the fact that both are lots of inode mutex
hung because of OOM, I am 90% sure they are the same.
I backported
Hello again,
I realized it is a series of patch actually:
3812c8c8f3953921ef18544110dafc3505c1ac62 mm: memcg: do not trap
chargers with full callstack on OOM
fb2a6fc56be66c169f8b80e07ed999ba453a2db2 mm: memcg: rework and
document OOM waiting and wakeup
519e52473ebe9db5cdef44670d5a97f1fd53d721
Hello again,
I realized it is a series of patch actually:
3812c8c8f3953921ef18544110dafc3505c1ac62 mm: memcg: do not trap
chargers with full callstack on OOM
fb2a6fc56be66c169f8b80e07ed999ba453a2db2 mm: memcg: rework and
document OOM waiting and wakeup
519e52473ebe9db5cdef44670d5a97f1fd53d721
On Tue, Sep 30, 2014 at 1:16 AM, Michal Hocko wrote:
> On Mon 29-09-14 20:43:46, Cong Wang wrote:
>> Hi, Johannes and Greg
>>
>>
>> Please consider to backport the following commit to stable kernels < 3.12.
>>
>> commit 3812c8c8f3953921ef18544110dafc3505c1ac62
>> Author: Johannes Weiner
>> Date:
On Mon 29-09-14 20:43:46, Cong Wang wrote:
> Hi, Johannes and Greg
>
>
> Please consider to backport the following commit to stable kernels < 3.12.
>
> commit 3812c8c8f3953921ef18544110dafc3505c1ac62
> Author: Johannes Weiner
> Date: Thu Sep 12 15:13:44 2013 -0700
>
> mm: memcg: do not
On Mon 29-09-14 20:43:46, Cong Wang wrote:
Hi, Johannes and Greg
Please consider to backport the following commit to stable kernels 3.12.
commit 3812c8c8f3953921ef18544110dafc3505c1ac62
Author: Johannes Weiner han...@cmpxchg.org
Date: Thu Sep 12 15:13:44 2013 -0700
mm: memcg:
On Tue, Sep 30, 2014 at 1:16 AM, Michal Hocko mho...@suse.cz wrote:
On Mon 29-09-14 20:43:46, Cong Wang wrote:
Hi, Johannes and Greg
Please consider to backport the following commit to stable kernels 3.12.
commit 3812c8c8f3953921ef18544110dafc3505c1ac62
Author: Johannes Weiner
Hi, Johannes and Greg
Please consider to backport the following commit to stable kernels < 3.12.
commit 3812c8c8f3953921ef18544110dafc3505c1ac62
Author: Johannes Weiner
Date: Thu Sep 12 15:13:44 2013 -0700
mm: memcg: do not trap chargers with full callstack on OOM
It should solve some
Hi, Johannes and Greg
Please consider to backport the following commit to stable kernels 3.12.
commit 3812c8c8f3953921ef18544110dafc3505c1ac62
Author: Johannes Weiner han...@cmpxchg.org
Date: Thu Sep 12 15:13:44 2013 -0700
mm: memcg: do not trap chargers with full callstack on OOM
It
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