Re: [PATCH 2/3] vmscan: make mapped executable pages the first class citizen
- From: Nai Xia <nai xia gmail com>
- To: Wu Fengguang <fengguang wu intel com>
- Cc: Nick Piggin <npiggin suse de>, Rik van Riel <riel redhat com>, Christoph Lameter <cl linux-foundation org>, "linux-mm kvack org" <linux-mm kvack org>, Peter Zijlstra <peterz infradead org>, "xorg lists freedesktop org" <xorg lists freedesktop org>, LKML <linux-kernel vger kernel org>, gnome-list gnome org, Andi Kleen <andi firstfloor org>, "minchan kim gmail com" <minchan kim gmail com>, KOSAKI Motohiro <kosaki motohiro jp fujitsu com>, Johannes Weiner <hannes cmpxchg org>, "tytso mit edu" <tytso mit edu>, Andrew Morton <akpm linux-foundation org>, Elladan <elladan eskimo com>
- Subject: Re: [PATCH 2/3] vmscan: make mapped executable pages the first class citizen
- Date: Mon, 8 Jun 2009 20:14:53 +0800
On Wed, May 20, 2009 at 11:38 PM, Wu Fengguang<fengguang wu intel com> wrote:
> Hi list,
> On Wed, May 20, 2009 at 10:56:07PM +0800, Wu Fengguang wrote:
>> On Wed, May 20, 2009 at 10:47:31PM +0800, Andi Kleen wrote:
>> > > > One scenario that might be useful to test is what happens when some
>> > > > very large processes, all mapped and executable exceed memory and
>> > >
>> > > Good idea. Too bad I may have to install some bloated desktop in order
>> > > to test this out ;) I guess the pgmajfault+pswpin numbers can serve as
>> > > negative scores in that case?
>> > I would just generate a large C program with a script and compile
>> > and run that. The program can be very dumb (e.g. only run
>> > a gigantic loop), it just needs to be large.
>> > Just don't compile it with optimization, that can be quite slow.
>> > And use multiple functions, otherwise gcc might exceed your memory.
>> Hehe, an arbitrary C program may not be persuasive..but I do have some
>> bloated binaries at hand :-)
>> -rwsr-sr-x 1 root wfg 36M 2009-04-22 17:21 Xorg
>> lrwxrwxrwx 1 wfg wfg 4 2009-04-22 17:21 X -> Xorg
>> -rwxr-xr-x 1 wfg wfg 39M 2009-04-22 17:21 Xvfb
>> -rwxr-xr-x 1 wfg wfg 35M 2009-04-22 17:21 Xnest
> I would like to create a lot of windows in gnome, and to switch
> between them. Any ideas on scripting/automating the "switch window"
You can easily do this in KDE 3.5 with dcop(Desktop Communications Protocol)\
$dcop kchmviewer-17502 KCHMMainWindow raise
will raise the window of my kchmviewer.
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