linux-kernel - Re: [Bug 67651] Bisected: Lots of fragmented mmaps cause gimp to fail in 3.12 after exceeding vm_max_map

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Message-ID: <20140123072833.GC4963@suse.de>
Date:	Thu, 23 Jan 2014 07:28:33 +0000
From:	Mel Gorman <mgorman@...e.de>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Cyrill Gorcunov <gorcunov@...il.com>,
	Pavel Emelyanov <xemul@...allels.com>, gnome@...t.net,
	drawoc@...krefraction.com, alan@...rguk.ukuu.org.uk,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	bugzilla-daemon@...zilla.kernel.org
Subject: Re: [Bug 67651] Bisected: Lots of fragmented mmaps cause gimp to
 fail in 3.12 after exceeding vm_max_map_count

On Wed, Jan 22, 2014 at 11:52:15AM -0800, Andrew Morton wrote:
> On Wed, 22 Jan 2014 19:08:16 +0000 Mel Gorman <mgorman@...e.de> wrote:
> 
> > X-related junk is there was because I was using a headless server and
> > xinit directly to launch gimp to reproduce the bug.
> 
> I've never done this.  Can you share the magic recipe for running an X
> app in this way?
> 

The relevant part of the test script is

# Build a wrapper script to launch gimp
cat > gimp-launch.sh << EOF
/usr/bin/gimp -i -b "(mmtests-open-image \"$FILENAME\")" -b "(gimp-quit 0)" > $LOGDIR_RESULTS/gimp-out.1 2>&1
echo \$? > gimp-exit-code
EOF
chmod u+x gimp-launch.sh

$TIME_CMD xinit ./gimp-launch.sh 2> $LOGDIR_RESULTS/time.1
RETVAL=`cat gimp-exit-code`

It's clumsy because the application would start with no window manager
and looking at it again, it probably was not even necessary because of
the -i switch in gimp.

Previously when I needed to automate an X app I configured the machine to
login automatically, exported the DISPLAY variable in the test script and
used wmctrl to detect if an application had a window displayed yet.

-- 
Mel Gorman
SUSE Labs
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