Date: Wed, 28 Apr 2004 05:41:10 -0500
From: "Jose R. Santos" <jrsantos@austin.ibm.com>
To: Andrew Morton <akpm@osdl.org>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>, corbet@lwn.net,
       linux-kernel@vger.kernel.org
Subject: Re: ext3 inode cache eats system, news at 11
Message-ID: <20040428104110.GU2995@rx8.ibm.com>
References: <20040426171856.22514.qmail@lwn.net> <20040426181235.2b5b62c8.akpm@osdl.org> <408DD2D5.1040306@yahoo.com.au> <20040426210237.788045cf.akpm@osdl.org>
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In-Reply-To: <20040426210237.788045cf.akpm@osdl.org> (from akpm@osdl.org on Mon, Apr 26, 2004 at 23:02:37 -0500)
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On 04/26/04 23:02:37, Andrew Morton wrote:
> Nick Piggin <nickpiggin@yahoo.com.au> wrote:
> >
> >  Andrew Morton wrote:
> > 
> >  > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.6-rc2/2.6.6-rc2-mm2/broken-out/slab-order-0-for-vfs-caches.patch
> >  > 
> >  > is not a completely happy solution, but it should fix things up.
> > 
> >  Another thing you could be doing is not zeroing swapper->nr
> >  if the shrinker function doesn't do anything, in order to try
> >  to maintain pressure on the dcache. This would be similar to
> >  your deferred list idea.
> 
> Am now doing this.
> 
> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.6-rc2/2.6.6-rc2-mm2/broken-out/shrink_slab-handle-GFP_NOFS.patch

Hi Andrew,

I've been fighting a similar problem to this one on a SpecSFS setup
that Im running and it seems that this patch fixes it.  While I was
trying several other patches at the time (all of them not dcache
related) and its hard right now to measure the exact improvement
percentage,  I would guess that these patches provides at least a 
11% improvement on my 64GB machine.

BTW: I was using JFS on my setup.

Thanks

-JRS

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