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Date: Sat, 27 Mar 2010 18:20:37 -0700 (PDT)
From: Ben Gamari <bgamari.foss@gmail.com>
Subject: Re: Poor interactive performance with I/O loads with fsync()ing
To: linux-kernel@vger.kernel.org
Cc: tytso@mit.edu, npiggin@suse.de, mingo@elte.hu,
       Ruald Andreae <ruald.a@gmail.com>, Jens Axboe <jens.axboe@oracle.com>,
       Olly Betts <olly@survex.com>, martin f krafft <madduck@madduck.net>
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Hey all,

I have posted another profile[1] from an incident yesterday. As you can see,
both swapper and init (strange?) show up prominently in the profile. Moreover,
most processes seem to be in blk_peek_request a disturbingly large percentage
of the time. Both of these profiles were taken with 2.6.34-rc kernels.

Anyone have any ideas on how to proceed? Is more profile data necessary? Are
the existing profiles at all useful? Thanks,

- Ben