From: Chuck Lever <cel@netapp.com>
Date: Mon, 20 Mar 2006 18:44:13 +0000 (-0500)
Subject: NFS: introduce mechanism for tracking NFS client metrics
X-Git-Tag: v2.6.17-rc1~667^2~82
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d9ef5a8c26aab09762afce43df64736720b4860e;p=pandora-kernel.git

NFS: introduce mechanism for tracking NFS client metrics

Add a per-superblock performance counter facility to the NFS client.  This
facility mimics the counters available for block devices and for
networking.  Expose these new counters via the new /proc/self/mountstats
interface.

Thanks to Andrew Morton and Trond Myklebust for their review and comments.

Test plan:
fsx and iozone on UP and SMP systems, with and without pre-emption.  Watch
for memory overwrite bugs, and performance loss (significantly more CPU
required per op).

Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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