From: Oleg Nesterov <oleg@redhat.com>
To: Peter Chiang <pchiang@nvidia.com>
Cc: "ccross@android.com" <ccross@android.com>,
"lizefan@huawei.com" <lizefan@huawei.com>,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
"tj@kernel.org" <tj@kernel.org>, "pavel@ucw.cz" <pavel@ucw.cz>,
"ebiederm@xmission.com" <ebiederm@xmission.com>,
"guillaume@morinfr.org" <guillaume@morinfr.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] mm : Avoid candidate task is equal to current task
Date: Fri, 18 Apr 2014 18:23:59 +0200 [thread overview]
Message-ID: <20140418162359.GA4398@redhat.com> (raw)
In-Reply-To: <80341664FB79C2419999599F48F7384102273279C3@HKMAIL01.nvidia.com>
On 04/17, Peter Chiang wrote:
>
> It is a speculation where the panic was.
>
> [38261.652100] Call trace:
> [38261.654616] [<ffffffc000aa6fe0>] mm_update_next_owner+0x190/0x238
> [38261.660766] [<ffffffc000aa728c>] do_exit+0x204/0x924
> [38261.665790] [<ffffffc000aa7a1c>] do_group_exit+0x40/0xcc
> [38261.671169] [<ffffffc000ab59cc>] get_signal_to_deliver+0x218/0x57c
> [38261.677409] [<ffffffc000a87e6c>] do_signal+0x534/0x550
> [38261.682608] [<ffffffc000a88070>] do_notify_resume+0x20/0x58
Could you show the full dmesg?
Could you look into asm/objdump/addr2line to figure out what this
mm_update_next_owner+0x190 means?
Is it reproducable?
Hmm. I seem to see a bug in this function, it can be fulled by use_mm,
but I am not sure this can explain the problem. I'll send a patch.
Oleg.
next prev parent reply other threads:[~2014-04-18 16:24 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-16 3:02 [PATCH] mm : Avoid candidate task is equal to current task Peter Chiang
2014-04-16 12:31 ` Peter Chiang
2014-04-16 12:52 ` Peter Chiang
2014-04-16 13:57 ` Oleg Nesterov
2014-04-17 6:48 ` Peter Chiang
2014-04-18 16:23 ` Oleg Nesterov [this message]
2014-04-18 17:26 ` [PATCH 0/2] memcg: mm_update_next_owner() should skip kthreads Oleg Nesterov
2014-04-18 17:26 ` [PATCH 1/2] " Oleg Nesterov
2014-04-18 17:27 ` [PATCH 2/2] memcg: optimize the "Search everything else" loop in mm_update_next_owner() Oleg Nesterov
2014-04-18 18:24 ` [PATCH 0/2] memcg: mm_update_next_owner() should skip kthreads Michal Hocko
2014-04-18 18:44 ` Oleg Nesterov
2014-04-18 19:12 ` [PATCH 0/1] memcg: kill start_kernel()->mm_init_owner(init_mm) Oleg Nesterov
2014-04-18 19:13 ` [PATCH 1/1] " Oleg Nesterov
2014-04-22 13:34 ` Michal Hocko
2014-04-22 13:23 ` [PATCH 0/1] " Michal Hocko
2014-04-22 16:15 ` [PATCH 0/1] memcg: kill CONFIG_MM_OWNER Oleg Nesterov
2014-04-22 16:15 ` [PATCH 1/1] " Oleg Nesterov
2014-04-22 16:39 ` Johannes Weiner
2014-04-22 16:59 ` [PATCH 0/1] " Michal Hocko
2014-04-22 10:52 ` [PATCH 0/2] memcg: mm_update_next_owner() should skip kthreads Michal Hocko
2014-04-22 13:21 ` Michal Hocko
2014-04-22 21:35 ` Hugh Dickins
2014-04-23 7:04 ` Michal Hocko
2014-04-19 8:34 ` Pavel Machek
2014-04-19 18:14 ` Oleg Nesterov
2014-04-19 21:23 ` Hugh Dickins
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