rcu: Make RCU_CPU_STALL_INFO include number of fqs attempts

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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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This commit is contained in:

Paul E. McKenney 2014-12-08 09:57:48 -08:00

parent e9408e4f27

commit fc908ed33e

3 changed files with 5 additions and 1 deletions

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1

kernel/rcu/tree.c

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2

kernel/rcu/tree.h

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3

kernel/rcu/tree_plugin.h

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