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From: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
To: Michal Hocko <mhocko@kernel.org>,
	Matthias Dahl <ml_linux-kernel@binary-island.eu>
Cc: linux-raid@vger.kernel.org, linux-mm@kvack.org,
	dm-devel@redhat.com, linux-kernel@vger.kernel.org,
	Mike Snitzer <snitzer@redhat.com>
Subject: Re: Page Allocation Failures/OOM with dm-crypt on software RAID10 (Intel Rapid Storage)
Date: Thu, 14 Jul 2016 20:18:49 +0900	[thread overview]
Message-ID: <9074e82f-bf52-011e-8bd7-5731d2b0dcaa@I-love.SAKURA.ne.jp> (raw)
In-Reply-To: <20160713134717.GL28723@dhcp22.suse.cz>

On 2016/07/13 22:47, Michal Hocko wrote:
> On Wed 13-07-16 15:18:11, Matthias Dahl wrote:
>> I tried to figure this out myself but
>> couldn't find anything -- what does the number "-3" state? It is the
>> position in some chain or has it a different meaning?
> 
> $ git grep "kmem_cache_create.*bio"
> block/bio-integrity.c:  bip_slab = kmem_cache_create("bio_integrity_payload",
> 
> so there doesn't seem to be any cache like that in the vanilla kernel.
> 
It is

  snprintf(bslab->name, sizeof(bslab->name), "bio-%d", entry);

line in bio_find_or_create_slab() in block/bio.c.
I think you can identify who is creating it by printing backtrace at that line.

  parent reply	other threads:[~2016-07-14 11:19 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-07-12  8:27 Page Allocation Failures/OOM with dm-crypt on software RAID10 (Intel Rapid Storage) Matthias Dahl
2016-07-12  9:50 ` Michal Hocko
2016-07-12 11:28   ` Matthias Dahl
2016-07-12 11:49     ` Michal Hocko
2016-07-12 11:59       ` Michal Hocko
2016-07-12 12:42       ` Matthias Dahl
2016-07-12 14:07         ` Michal Hocko
2016-07-12 14:56           ` Matthias Dahl
2016-07-13 11:21             ` Michal Hocko
2016-07-13 12:18               ` Michal Hocko
2016-07-13 13:18                 ` Matthias Dahl
2016-07-13 13:47                   ` Michal Hocko
2016-07-13 15:32                     ` Matthias Dahl
2016-07-13 16:24                       ` [dm-devel] " Ondrej Kozina
2016-07-13 18:24                         ` Matthias Dahl
2016-07-14 11:18                     ` Tetsuo Handa [this message]
2016-07-15  7:11                       ` Page Allocation Failures/OOM with dm-crypt on software RAID10 (Intel Rapid Storage) with check/repair/sync Matthias Dahl
2016-07-18  7:24                         ` Matthias Dahl

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