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Date: Thu, 20 Feb 2003 23:45:22 -0800
From: Andrew Morton <akpm@digeo.com>
To: "Martin J. Bligh" <mbligh@aracnet.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Strange performance change 59 -> 61/62
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"Martin J. Bligh" <mbligh@aracnet.com> wrote:
>
> Some more stats ... which look rather suspicious. 600% increase for
> dentry_open and __mark_inode_dirty? Hmmmmm.

__mark_inode_dirty() just got itself an smp_mb().  Would be instructive to
disable that.

dentry_open(): don't know - fs/open.c hasn't changed at all.  Perhaps
dcache_rcu has caused additional pingpong?