From: Mel Gorman <mgorman@suse.de>
To: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Pavel Emelyanov <xemul@parallels.com>,
Andrew Morton <akpm@linux-foundation.org>,
gnome@rvzt.net, drawoc@darkrefraction.com,
alan@lxorguk.ukuu.org.uk, linux-mm@kvack.org,
linux-kernel@vger.kernel.org,
bugzilla-daemon@bugzilla.kernel.org
Subject: Re: [Bug 67651] Bisected: Lots of fragmented mmaps cause gimp to fail in 3.12 after exceeding vm_max_map_count
Date: Thu, 23 Jan 2014 09:55:41 +0000 [thread overview]
Message-ID: <20140123095541.GD4963@suse.de> (raw)
In-Reply-To: <20140122223325.GA30637@moon>
On Thu, Jan 23, 2014 at 02:33:25AM +0400, Cyrill Gorcunov wrote:
> On Wed, Jan 22, 2014 at 11:19:28PM +0400, Cyrill Gorcunov wrote:
> > > commit. Test case was simple -- try and open the large file described in
> > > the bug. I did not investigate the patch itself as I'm just reporting
> > > the results of the bisection. If I had to guess, I'd say that VMA
> > > merging has been affected.
> >
> > Thanks a lot for report, Mel! I'm investigating...
>
> Mel, here is a quick fix for bring merging back (just in case if you
> have a minute to test it and confirm the merging were affected). It
> seems I've lost setting up vma-softdirty bit somewhere and procedure
> which tests vma flags mathcing fails, will continue investigating/testing
> tomorrow.
The test case passes with this patch applied to 3.13 so that appears
to confirm that this is related to VM_SOFTDIRTY preventing merges.
Unfortunately I did not have slabinfo tracking enabled to double check
the number of vm_area_structs in teh system.
--
Mel Gorman
SUSE Labs
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next prev parent reply other threads:[~2014-01-23 9:55 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-22 19:08 [Bug 67651] Bisected: Lots of fragmented mmaps cause gimp to fail in 3.12 after exceeding vm_max_map_count Mel Gorman
2014-01-22 19:19 ` Cyrill Gorcunov
2014-01-22 22:33 ` Cyrill Gorcunov
2014-01-23 9:55 ` Mel Gorman [this message]
2014-01-23 10:36 ` Cyrill Gorcunov
2014-01-23 12:15 ` Cyrill Gorcunov
2014-01-23 12:55 ` Cyrill Gorcunov
2014-01-23 15:14 ` [PATCH] mm: Ignore VM_SOFTDIRTY on VMA merging, v2 Cyrill Gorcunov
2014-01-23 18:07 ` Pavel Emelyanov
2014-01-23 21:02 ` Andrew Morton
2014-01-23 21:45 ` Cyrill Gorcunov
2014-01-24 10:14 ` Mel Gorman
2014-01-24 11:56 ` Cyrill Gorcunov
2014-01-24 13:41 ` Mel Gorman
2014-01-24 14:23 ` Cyrill Gorcunov
2014-01-23 10:30 ` [Bug 67651] Bisected: Lots of fragmented mmaps cause gimp to fail in 3.12 after exceeding vm_max_map_count Mel Gorman
2014-01-22 19:52 ` Andrew Morton
2014-01-23 7:28 ` Mel Gorman
2014-01-22 22:45 ` Andy Lutomirski
2014-01-23 5:59 ` Cyrill Gorcunov
2014-01-23 6:09 ` Andrew Morton
2014-01-23 6:27 ` Cyrill Gorcunov
2022-11-21 17:23 ` Muhammad Usama Anjum
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