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Date: Sun, 17 Mar 2002 17:09:55 -0500
From: Theodore Tso <tytso@mit.edu>
To: Anton Blanchard <anton@samba.org>
Cc: Gerrit Huizenga <gh@us.ibm.com>, lse-tech@lists.sourceforge.net,
        linux-kernel@vger.kernel.org
Subject: Re: [Lse-tech] 7.52 second kernel compile
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On Sun, Mar 17, 2002 at 11:34:34PM +1100, Anton Blanchard wrote:
> 
> > And this *without* the dcache_lock?  Hmm.  So you are saying there
> > may still be room for improvement?
> 
> I tried the dcache lock patches but found it hard to see a difference,
> for us the mm stuff still seems to be the bottleneck.

Try the patch which gets rid of the BKL in ext2_get_block() --- if you
don't have that, let me know, I've got one kicking around that mostly
works except I haven't validated that it does the right thing if
quotas are enabled.  If you're running with a cold page cache, I
suspect that will help out much more.  If the numbers are assuming a
page-cache already preloaded with then getting rid of the BKL in
ext2_get_block() will help somewhat, but maybe not enough to be
significant.

						- Ted
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