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The current RCU CPU stall warning code will print "Stall ended before state dump start" any time that the stall-warning code is triggered on a CPU that has already reported a quiescent state for the current grace period and if all quiescent states have been reported for the current grace period. However, a true stall can result in these symptoms, for example, by preventing RCU's grace-period kthreads from ever running This commit therefore checks for this condition, reporting the end of the stall only if one of the grace-period counters has actually advanced. Otherwise, it reports the last time that the grace-period kthread made meaningful progress. (In normal situations, the grace-period kthread should make meaningful progress at least every jiffies_till_next_fqs jiffies.) Reported-by: Miroslav Benes <mbenes@suse.cz> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Tested-by: Miroslav Benes <mbenes@suse.cz> |
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| .. | ||
| 00-INDEX | ||
| arrayRCU.txt | ||
| checklist.txt | ||
| listRCU.txt | ||
| lockdep-splat.txt | ||
| lockdep.txt | ||
| NMI-RCU.txt | ||
| rcu_dereference.txt | ||
| rcu.txt | ||
| rcubarrier.txt | ||
| rculist_nulls.txt | ||
| rcuref.txt | ||
| RTFP.txt | ||
| stallwarn.txt | ||
| torture.txt | ||
| trace.txt | ||
| UP.txt | ||
| whatisRCU.txt | ||