From: Jeremy Kerr <jk@ozlabs.org>
Date: Wed, 11 Mar 2009 17:55:52 +0000 (+0000)
Subject: powerpc: Add virtual processor dispatch trace log
X-Git-Tag: v2.6.30-rc1~619^2~23
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fc59a3fc8eed3a2c811e64ec65015d7eb1459ace;p=pandora-kernel.git

powerpc: Add virtual processor dispatch trace log

pseries SPLPAR machines are able to retrieve a log of dispatch and
preempt events from the hypervisor. With this information, we can
see when and why each dispatch & preempt is occuring.

This change adds a set of debugfs files allowing userspace to read this
dispatch log.

Based on initial patches from Nishanth Aravamudan <nacc@us.ibm.com>.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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