From: William Lee Irwin III <wli@holomorphy.com>
To: Andrew Morton <akpm@digeo.com>
Cc: "Martin J. Bligh" <mbligh@aracnet.com>, linux-kernel@vger.kernel.org
Subject: Re: 67-mjb2 vs 68-mjb1 (sdet degredation)
Date: Mon, 21 Apr 2003 15:55:52 -0700 [thread overview]
Message-ID: <20030421225552.GE8978@holomorphy.com> (raw)
In-Reply-To: <20030421144631.4987db46.akpm@digeo.com>
"Martin J. Bligh" <mbligh@aracnet.com> wrote:
>> Just wondering if you can recognise / guess the problem from the profiles,
>> else I'll poke at it some more (will probably just work out what's hitting
>> .text.lock.filemap).
On Mon, Apr 21, 2003 at 02:46:31PM -0700, Andrew Morton wrote:
> erk. Looks like the rwlock->spinlock conversion of mapping->page_lock.
> That was a small (1%?) win on small SMP, and looks to be a small lose on
> big SMP. No real surprise there.
> Here's a backout patch. Does it fix it up?
I've yet to recover from merging against this and several others;
hopefully mbligh can run the numbers you need.
-- wli
next prev parent reply other threads:[~2003-04-21 22:44 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-04-21 21:12 67-mjb2 vs 68-mjb1 (sdet degredation) Martin J. Bligh
2003-04-21 21:46 ` Andrew Morton
2003-04-21 22:55 ` William Lee Irwin III [this message]
2003-04-22 3:22 ` Martin J. Bligh
2003-04-22 3:52 ` Andrew Morton
2003-04-22 4:14 ` Martin J. Bligh
2003-04-22 4:06 ` Martin J. Bligh
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