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rcu: improve RCU CPU stall-warning messages

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The existing RCU CPU stall-warning messages can be confusing, especially
in the case where one CPU detects a single other stalled CPU.  In addition,
the console messages did not say which flavor of RCU detected the stall,
which can make it difficult to work out exactly what is causing the stall.
This commit improves these messages.

Requested-by: Dhaval Giani <dhaval.giani@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney 2010-04-13 16:18:22 -07:00
parent 26845c2860
commit 4300aa642c
2 changed files with 12 additions and 9 deletions
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1
kernel/rcutree.h
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@ -326,6 +326,7 @@ struct rcu_state {
unsigned long jiffies_stall; /* Time at which to check */
/* for CPU stalls. */
#endif /* #ifdef CONFIG_RCU_CPU_STALL_DETECTOR */
char *name; /* Name of structure. */
};
/* Return values for rcu_preempt_offline_tasks(). */