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Date: Wed, 14 Dec 2016 14:39:58 +0100
From: Michal Hocko <mhocko@kernel.org>
To: Ian Jackson <ian.jackson@eu.citrix.com>
Cc: xen-devel@lists.xensource.com,
        Lukasz Odzioba <lukasz.odzioba@intel.com>,
        Kirill Shutemov <kirill.shutemov@linux.intel.com>,
        Andrea Arcangeli <aarcange@redhat.com>,
        Vladimir Davydov <vdavydov@parallels.com>,
        Ming Li <mingli199x@qq.com>, Minchan Kim <minchan@kernel.org>,
        stable@vger.kernel.org, Andrew Morton <akpm@linux-foundation.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Sasha Levin <sasha.levin@oracle.com>
Subject: Re: Regression due to "mm/swap.c: flush lru pvecs on compound page
 arrival"
Message-ID: <20161214133958.GK25573@dhcp22.suse.cz>
References: <E1cH512-0002Ax-Qy@osstest.test-lab.xenproject.org>
 <22609.18772.521248.918298@mariner.uk.xensource.com>
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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.

Could you be more specific about the regression please?
-- 
Michal Hocko
SUSE Labs