From: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Date: Mon, 8 Dec 2014 17:57:48 +0000 (-0800)
Subject: rcu: Make RCU_CPU_STALL_INFO include number of fqs attempts
X-Git-Tag: omap-for-v4.1/prcm-dts-mfd-syscon-fix~166^2^2^5~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fc908ed33e7c1428f799abb12399f906da03b397;p=pandora-kernel.git

rcu: Make RCU_CPU_STALL_INFO include number of fqs attempts

One way that an RCU CPU stall warning can happen is if the grace-period
kthread is not allowed to execute.  One proxy for this kthread's
forward progress is the number of force-quiescent-state (fqs) scans.
This commit therefore adds the number of fqs scans to the RCU CPU stall
warning printouts when CONFIG_RCU_CPU_STALL_INFO=y.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
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