linux-kernel - Re: High load in 2.6.27, NFS / rpcauth_lookup

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Message-ID: <20081117123536.GA16539@squirrel.roonstrasse.net>
Date:	Mon, 17 Nov 2008 13:35:36 +0100
From:	Max Kellermann <max@...mpel.org>
To:	Trond Myklebust <trond.myklebust@....uio.no>
Cc:	linux-kernel@...r.kernel.org, linux-nfs@...r.kernel.org
Subject: Re: High load in 2.6.27, NFS / rpcauth_lookup_credcache()?

On 2008/10/27 16:48, Trond Myklebust <trond.myklebust@....uio.no> wrote:
> OK. That points a finger at the garbage collector. Does the following
> patch help at all?

Hi Trond,

the server's load seems to be a little bit lower with 2.6.27.6 plus
your patch, but OProfile still gives me 45% in
rpcauth_lookup_credcache().  See:

1060627  45.1474  (no location information)   rpcauth_lookup_credcache
289362   12.3172  auth_generic.c:0            generic_match
31886     1.3573  page_alloc.c:0              get_page_from_freelist
23932     1.0187  (no location information)   page_fault
22176     0.9440  (no location information)   schedule
14613     0.6220  (no location information)   __d_lookup
[...]

Max
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