From: Dave Hansen <dave.hansen@linux.intel.com>
Date: Fri, 21 Jun 2013 15:51:38 +0000 (-0700)
Subject: x86: Add NMI duration tracepoints
X-Git-Tag: omap-for-v3.11/fixes-for-merge-window~62^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0c4df02d739fed5ab081b330d67403206dd3967e;p=pandora-kernel.git

x86: Add NMI duration tracepoints

This patch has been invaluable in my adventures finding
issues in the perf NMI handler.  I'm as big a fan of
printk() as anybody is, but using printk() in NMIs is
deadly when they're happening frequently.

Even hacking in trace_printk() ended up eating enough
CPU to throw off some of the measurements I was making.

Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: paulus@samba.org
Cc: acme@ghostprotocols.net
Cc: Dave Hansen <dave@sr71.net>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---

Reading git-diff-tree failed