From: Michal Hocko <mhocko@kernel.org>
To: Ian Jackson <ian.jackson@eu.citrix.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>,
Vladimir Davydov <vdavydov@parallels.com>,
xen-devel@lists.xensource.com, Ming Li <mingli199x@qq.com>,
stable@vger.kernel.org, Minchan Kim <minchan@kernel.org>,
Lukasz Odzioba <lukasz.odzioba@intel.com>,
Sasha Levin <sasha.levin@oracle.com>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Kirill Shutemov <kirill.shutemov@linux.intel.com>
Subject: Re: Regression due to "mm/swap.c: flush lru pvecs on compound page arrival"
Date: Wed, 14 Dec 2016 16:21:48 +0100 [thread overview]
Message-ID: <20161214152148.GO25573@dhcp22.suse.cz> (raw)
In-Reply-To: <22609.18772.521248.918298@mariner.uk.xensource.com>
On Wed 14-12-16 13:29:56, Ian Jackson wrote:
> osstest service owner writes ("[linux-3.18 bisection] complete test-amd64-amd64-xl-qemut-win7-amd64"):
> > *** Found and reproduced problem changeset ***
> >
> > Bug is in tree: linux git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
> > Bug introduced: a2d8c514753276394d68414f563591f174ef86cb
> > Bug not present: 8f620446135b64ca6f96cf32066a76d64e79a388
> > Last fail repro: http://logs.test-lab.xenproject.org/osstest/logs/103315/
> >
> > commit a2d8c514753276394d68414f563591f174ef86cb
> > Author: Lukasz Odzioba <lukasz.odzioba@intel.com>
> > Date: Fri Jun 24 14:50:01 2016 -0700
> >
> > mm/swap.c: flush lru pvecs on compound page arrival
>
> This commit breaks the test "test-amd64-amd64-xl-qemut-win7-amd64" in
> the Xen Project CI system.
Ohh, I can see it now. This is not an upstream commit. This is a 3.18.37
backport which was wrong! You need the follow up fix 52c84a95dc6a
("4.1.28 Fix bad backport of 8f182270dfec "mm/swap.c: flush lru pvecs on
compound page arrival""). The primary problem was that __lru_cache_add
has leaked pages which would explain your OOM.
--
Michal Hocko
SUSE Labs
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next prev parent reply other threads:[~2016-12-14 15:21 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-14 8:34 [linux-3.18 bisection] complete test-amd64-amd64-xl-qemut-win7-amd64 osstest service owner
2016-12-14 13:29 ` Regression due to "mm/swap.c: flush lru pvecs on compound page arrival" Ian Jackson
2016-12-14 13:39 ` Michal Hocko
2016-12-14 15:14 ` Ian Jackson
2016-12-14 16:46 ` Greg KH
2016-12-14 16:58 ` Ian Jackson
2016-12-14 15:21 ` Michal Hocko [this message]
2016-12-19 18:53 ` Odzioba, Lukasz
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