From: Lai Jiangshan <laijs@cn.fujitsu.com>
Date: Tue, 30 Mar 2010 10:40:36 +0000 (+0800)
Subject: rcu: ignore offline CPUs in last non-dyntick-idle CPU check
X-Git-Tag: v2.6.35-rc1~524^2~19
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5db356736acb9ba717df1aa9444e4e44cbb30a71;p=pandora-kernel.git

rcu: ignore offline CPUs in last non-dyntick-idle CPU check

Offline CPUs are not in nohz_cpu_mask, but can be ignored when checking
for the last non-dyntick-idle CPU.  This patch therefore only checks
online CPUs for not being dyntick idle, allowing fast entry into
full-system dyntick-idle state even when there are some offline CPUs.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
---

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