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Date: Sun, 23 Mar 2003 23:27:59 -0800
From: William Lee Irwin III <wli@holomorphy.com>
To: Andrew Morton <akpm@digeo.com>
Cc: Ingo Molnar <mingo@elte.hu>, linux-kernel@vger.kernel.org,
       linux-mm@kvack.org
Subject: Re: 2.5.65-mm4
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On Sun, Mar 23, 2003 at 11:17:16PM -0800, Andrew Morton wrote:
> In the case of ext2 the codepath which needs to be locked is very small, and
> converting it to use a per-blockgroup spinlock was a big win on the 16-way
> numas, and perhaps 8-way x440's.  On 4-way xeon and ppc64 the effects were
> very small indeed - 1.5% on xeon, zero on ppc64.

And also very large on 32x NUMA-Q.


-- wli
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