From: David Chinner <dgc@sgi.com>
To: "Mr. Berkley Shands" <bshands@exegy.com>
Cc: David Chinner <dgc@sgi.com>, Eric Sandeen <sandeen@sandeen.net>,
Dave Lloyd <dlloyd@exegy.com>,
linux-xfs@oss.sgi.com
Subject: Re: XFS and 2.6.18 -> 2.6.20-rc3
Date: Thu, 11 Jan 2007 09:08:43 +1100 [thread overview]
Message-ID: <20070110220843.GA44411608@melbourne.sgi.com> (raw)
In-Reply-To: <45A4EA2B.5050505@exegy.com>
On Wed, Jan 10, 2007 at 07:29:15AM -0600, Mr. Berkley Shands wrote:
> With a fresh install of the O/S on a non-broken motherboard, the change to
>
> /proc/sys/vm/dirty_ratio
>
> restores most of the lost performance from 2.6.18,
> as of 2.6.20-rc4. The difference is 10% to 15% without the dirty_ratio
> change (40 is the default, 10 gives the old performance).
....
> So whatever needs to be tweaked in the VM system seems to be the key.
>
> Thanks to all for getting this regression repaired.
Well, it's not repaired as such - you've got a WAR for the problem.
I'll report the problem to lkml so that the VM gurus can try to
really fix the problem....
Thanks for confirming that the dirty_ratio tweak also worked
for you.
Cheers,
Dave.
--
Dave Chinner
Principal Engineer
SGI Australian Software Group
prev parent reply other threads:[~2007-01-10 22:09 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-08 17:13 XFS and 2.6.18 -> 2.6.20-rc3 Mr. Berkley Shands
2007-01-08 17:17 ` Eric Sandeen
2007-01-09 1:22 ` David Chinner
2007-01-09 7:25 ` David Chinner
2007-01-10 13:29 ` Mr. Berkley Shands
2007-01-10 22:08 ` David Chinner [this message]
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