From: Naga Chumbalkar <nagananda.chumbalkar@hp.com>
Date: Tue, 23 Feb 2010 17:14:58 +0000 (+0100)
Subject: oprofile/x86: add comment to counter-in-use warning
X-Git-Tag: v2.6.34-rc1~264^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8588d1067147e14d1dd521fbadd1d2564f8cc794;p=pandora-kernel.git

oprofile/x86: add comment to counter-in-use warning

Currently, oprofile fails silently on platforms where a non-OS entity
such as the system firmware "enables" and uses a performance
counter. There is a warning in the code for this case.

The warning indicates an already running counter. If oprofile doesn't
collect data, then try using a different performance counter on your
platform to monitor the desired event. Delete the counter from the
desired event by editing the

 /usr/share/oprofile/<cpu_type>/<cpu>/events

file. If the event cannot be monitored by any other counter, contact
your hardware or BIOS vendor.

Cc: Shashi Belur <shashi-kiran.belur@hp.com>
Cc: Tony Jones <tonyj@suse.de>
Signed-off-by: Naga Chumbalkar <nagananda.chumbalkar@hp.com>
Signed-off-by: Robert Richter <robert.richter@amd.com>
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