From: Andrew Morton <akpm@linux-foundation.org>
To: Andrew Vagin <avagin@parallels.com>
Cc: Andrey Vagin <avagin@openvz.org>,
linux-mm@kvack.org, cgroups@vger.kernel.org,
linux-kernel@vger.kernel.org, Glauber Costa <glommer@openvz.org>,
Johannes Weiner <hannes@cmpxchg.org>,
Michal Hocko <mhocko@suse.cz>,
Balbir Singh <bsingharora@gmail.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Konstantin Khlebnikov <khlebnikov@openvz.org>,
stable@vger.kernel.org
Subject: Re: [PATCH] memcg: don't initialize kmem-cache destroying work for root caches
Date: Mon, 5 Aug 2013 14:16:09 -0700 [thread overview]
Message-ID: <20130805141609.777a0d6dee55091f6981c39b@linux-foundation.org> (raw)
In-Reply-To: <20130805210128.GA2772@paralelels.com>
On Tue, 6 Aug 2013 01:01:28 +0400 Andrew Vagin <avagin@parallels.com> wrote:
> On Mon, Aug 05, 2013 at 01:05:30PM -0700, Andrew Morton wrote:
> > On Mon, 5 Aug 2013 20:09:40 +0400 Andrey Vagin <avagin@openvz.org> wrote:
> >
> > > struct memcg_cache_params has a union. Different parts of this union
> > > are used for root and non-root caches. A part with destroying work is
> > > used only for non-root caches.
> > >
> > > I fixed the same problem in another place v3.9-rc1-16204-gf101a94, but
> > > didn't notice this one.
> > >
> > > Cc: <stable@vger.kernel.org> [3.9.x]
> >
> > hm, why the cc:stable?
>
> Because this patch fixes the kernel panic:
>
> [ 46.848187] BUG: unable to handle kernel paging request at 000000fffffffeb8
> [ 46.849026] IP: [<ffffffff811a484c>] kmem_cache_destroy_memcg_children+0x6c/0xc0
> [ 46.849092] PGD 0
> [ 46.849092] Oops: 0000 [#1] SMP
OK, pretty soon we'll have a changelog!
What does one do to trigger this oops? The bug has been there since
3.9, so the means-of-triggering must be quite special?
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next prev parent reply other threads:[~2013-08-05 21:16 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-05 16:09 Andrey Vagin
2013-08-05 20:05 ` Andrew Morton
2013-08-05 21:01 ` Andrew Vagin
2013-08-05 21:16 ` Andrew Morton [this message]
2013-08-05 21:41 ` Andrew Vagin
-- strict thread matches above, loose matches on Subject: below --
2013-05-22 8:09 Andrey Vagin
2013-05-14 12:38 Andrey Vagin
2013-05-14 14:40 ` Michal Hocko
2013-05-14 14:44 ` Michal Hocko
2013-05-14 14:49 ` Glauber Costa
2013-05-14 14:52 ` Michal Hocko
2013-05-14 16:08 ` Michal Hocko
2013-05-22 7:40 ` Andrew Vagin
2013-05-22 7:50 ` Li Zefan
2013-05-22 7:56 ` Andrew Vagin
2013-05-22 10:32 ` Michal Hocko
2013-05-28 22:53 ` Andrew Morton
2013-05-29 2:48 ` Glauber Costa
2013-05-30 10:59 ` Glauber Costa
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