From: Holger Kiehl <Holger.Kiehl@dwd.de>
To: David Rientjes <rientjes@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>, Michal Hocko <mhocko@suse.cz>,
linux-kernel <linux-kernel@vger.kernel.org>,
Mel Gorman <mgorman@suse.de>,
linux-mm@kvack.org
Subject: Re: Need help in bug in isolate_migratepages_range
Date: Tue, 4 Feb 2014 07:17:18 +0000 (GMT) [thread overview]
Message-ID: <alpine.LRH.2.02.1402040713220.13901@diagnostix.dwd.de> (raw)
In-Reply-To: <alpine.DEB.2.02.1402031602060.10778@chino.kir.corp.google.com>
On Mon, 3 Feb 2014, David Rientjes wrote:
> On Mon, 3 Feb 2014, Vlastimil Babka wrote:
>
>> It seems to come from balloon_page_movable() and its test page_count(page) ==
>> 1.
>>
>
> Hmm, I think it might be because compound_head() == NULL here. Holger,
> this looks like a race condition when allocating a compound page, did you
> only see it once or is it actually reproducible?
>
No, this only happened once. It is not reproducable, the system was running
for four days without problems. And before this kernel, five years without
any problems.
Thanks,
Holger
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2014-02-04 7:17 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <alpine.LRH.2.02.1401312037340.6630@diagnostix.dwd.de>
2014-02-03 12:20 ` Michal Hocko
2014-02-03 14:29 ` Holger Kiehl
2014-02-03 16:20 ` Michal Hocko
2014-02-03 16:52 ` Vlastimil Babka
2014-02-04 0:06 ` David Rientjes
2014-02-04 7:17 ` Holger Kiehl [this message]
2014-02-05 0:02 ` [patch] mm, page_alloc: make first_page visible before PageTail David Rientjes
2014-02-05 0:06 ` Andrew Morton
2014-02-05 0:14 ` David Rientjes
2014-02-05 0:22 ` [patch v2] " David Rientjes
2014-02-05 8:42 ` Michal Hocko
2014-02-12 9:00 ` [patch -mm] mm: close PageTail race David Rientjes
2014-02-03 19:50 ` Need help in bug in isolate_migratepages_range Holger Kiehl
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=alpine.LRH.2.02.1402040713220.13901@diagnostix.dwd.de \
--to=holger.kiehl@dwd.de \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mgorman@suse.de \
--cc=mhocko@suse.cz \
--cc=rientjes@google.com \
--cc=vbabka@suse.cz \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox