From: Ingo Molnar <mingo@elte.hu>
Date: Fri, 1 Jun 2007 07:47:16 +0000 (-0700)
Subject: timer stats: speedups
X-Git-Tag: v2.6.22-rc4~16
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c1a834dc704763673df10282995257f2de93cbe9;p=pandora-kernel.git

timer stats: speedups

Make timer-stats have almost zero overhead when enabled in the config but
not used.  (this way distros can enable it more easily)

Also update the documentation about overhead of timer_stats - it was
written for the first version which had a global lock and a linear list
walk based lookup ;-)

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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