linux-kernel - Re: [PATCH 0/3] make mapped executable pages the first class citizen

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Message-ID: <20090617143756.5c57f6e7@jbarnes-g45>
Date:	Wed, 17 Jun 2009 14:37:56 -0700
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Wu Fengguang <fengguang.wu@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/3] make mapped executable pages the first class
 citizen

On Wed, 17 Jun 2009 14:11:35 -0700
Jesse Barnes <jbarnes@...tuousgeek.org> wrote:

> On Sat, 16 May 2009 16:56:16 +0200
> Peter Zijlstra <peterz@...radead.org> wrote:
> 
> > On Sat, 2009-05-16 at 17:00 +0800, Wu Fengguang wrote:
> > > Andrew,
> > > 
> > > This patchset makes mapped executable pages the first class
> > > citizen. This version has incorparated many valuable comments
> > > from people in the CC list, and runs OK on my desktop. Let's test
> > > it in your -mm?
> > 
> > Seems like a good set to me. Thanks for following this through Wu!
> 
> Now that this set has hit the mainline I just wanted to chime in and
> say this makes a big difference.  Under my current load (a parallel
> kernel build and virtualbox session the old kernel would have been
> totally unusable.  With Linus's current bits, things are much better
> (still a little sluggish with a big dd going on in the virtualbox, but
> actually usable).

To really make things better though, I changed from CFQ to deadline on
the disk I'm using.  I also changed swappiness to 40 and reduced my
max_sectors_kb (512 -> 64) though...

-- 
Jesse Barnes, Intel Open Source Technology Center
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