From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 12 Nov 2009 21:12:06 +0000 (+0100)
Subject: nohz: Track last do_timer() cpu
X-Git-Tag: v2.6.33-rc1~363^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=27185016b806d5a1181ff501cae120582b2b27dd;p=pandora-kernel.git

nohz: Track last do_timer() cpu

The previous patch which limits the sleep time to the maximum
deferment time of the time keeping clocksource has some limitations on
SMP machines: if all CPUs are idle then for all CPUs the maximum sleep
time is limited.

Solve this by keeping track of which cpu had the do_timer() duty
assigned last and limit the sleep time only for this cpu.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
LKML-Reference: <new-submission>
Cc: Jon Hunter <jon-hunter@ti.com>
Cc: John Stultz <johnstul@us.ibm.com>
---

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