From: Michal Hocko <mhocko@suse.cz>
To: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Mika Westerberg <mika.westerberg@intel.com>,
Hugh Dickins <hughd@google.com>,
linux-mm@kvack.org
Subject: Re: mm related crash
Date: Mon, 14 Dec 2015 11:05:56 +0100 [thread overview]
Message-ID: <20151214100556.GB4540@dhcp22.suse.cz> (raw)
In-Reply-To: <20151214092433.GA90449@black.fi.intel.com>
On Mon 14-12-15 11:24:33, Kirill A. Shutemov wrote:
> On Thu, Dec 10, 2015 at 05:48:01PM +0200, Mika Westerberg wrote:
> > Hi Kirill,
> >
> > I got following crash on my desktop machine while building swift. It
> > reproduces pretty easily on 4.4-rc4.
> >
> > Before it happens the ld process is killed by OOM killer. I attached the
> > whole dmesg.
> >
> > [ 254.740603] page:ffffea00111c31c0 count:2 mapcount:0 mapping: (null) index:0x0
> > [ 254.740636] flags: 0x5fff8000048028(uptodate|lru|swapcache|swapbacked)
> > [ 254.740655] page dumped because: VM_BUG_ON_PAGE(!PageLocked(page))
> > [ 254.740679] ------------[ cut here ]------------
> > [ 254.740690] kernel BUG at mm/memcontrol.c:5270!
>
>
> Hm. I don't see how this can happen.
What a coincidence. I have just posted a similar report:
http://lkml.kernel.org/r/20151214100156.GA4540@dhcp22.suse.cz except I
have hit the VM_BUG_ON from a different path. My suspicion is that
somebody unlocks the page while we are waiting on the writeback.
I am trying to reproduce this now.
--
Michal Hocko
SUSE Labs
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next prev parent reply other threads:[~2015-12-14 10:05 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20151210154801.GA12007@lahna.fi.intel.com>
2015-12-14 9:24 ` Kirill A. Shutemov
2015-12-14 10:05 ` Michal Hocko [this message]
2015-12-14 10:13 ` Andrey Ryabinin
2015-12-14 10:57 ` Michal Hocko
2015-12-14 11:14 ` Andrey Ryabinin
2015-12-14 11:54 ` Michal Hocko
2015-12-14 12:11 ` Mika Westerberg
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