From: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date: Thu, 9 Apr 2009 08:53:44 +0000 (+0200)
Subject: perf_counter: optimize mmap/comm tracking
X-Git-Tag: v2.6.31-rc1~383^2~372
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9ee318a7825929bc3734110b83ae8e20e53d9de3;p=pandora-kernel.git

perf_counter: optimize mmap/comm tracking

Impact: performance optimization

The mmap/comm tracking code does quite a lot of work before it discovers
there's no interest in it, avoid that by keeping a counter.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
LKML-Reference: <20090409085524.427173196@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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