Messages in this thread |  | | Date | Wed, 4 Dec 2013 18:28:38 -0500 | From | Dave Jones <> | Subject | lots of brief rcu stalls. |
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Paul, I'm seeing this happening more and more lately...
[ 771.786462] INFO: rcu_preempt detected stalls on CPUs/tasks: [ 771.786552] Tasks blocked on level-0 rcu_node (CPUs 0-3): [ 771.786574] Tasks blocked on level-0 rcu_node (CPUs 0-3): [ 771.786595] (detected by 0, t=6502 jiffies, g=20611, c=20610, q=0) [ 771.786620] INFO: Stall ended before state dump start [ 966.724546] INFO: rcu_preempt detected stalls on CPUs/tasks: [ 966.724854] Tasks blocked on level-0 rcu_node (CPUs 0-3): [ 966.724931] Tasks blocked on level-0 rcu_node (CPUs 0-3): [ 966.725005] (detected by 0, t=26007 jiffies, g=20611, c=20610, q=0) [ 966.725093] INFO: Stall ended before state dump start [ 1161.661459] INFO: rcu_preempt detected stalls on CPUs/tasks: [ 1161.661763] Tasks blocked on level-0 rcu_node (CPUs 0-3): [ 1161.661840] Tasks blocked on level-0 rcu_node (CPUs 0-3): [ 1161.661915] (detected by 0, t=45512 jiffies, g=20611, c=20610, q=0) [ 1161.662001] INFO: Stall ended before state dump start [ 1356.598205] INFO: rcu_preempt detected stalls on CPUs/tasks: [ 1356.598513] Tasks blocked on level-0 rcu_node (CPUs 0-3): [ 1356.598590] Tasks blocked on level-0 rcu_node (CPUs 0-3): [ 1356.598664] (detected by 0, t=65017 jiffies, g=20611, c=20610, q=0) [ 1356.598751] INFO: Stall ended before state dump start [ 1551.536099] INFO: rcu_preempt detected stalls on CPUs/tasks: [ 1551.536408] Tasks blocked on level-0 rcu_node (CPUs 0-3): [ 1551.536485] Tasks blocked on level-0 rcu_node (CPUs 0-3): [ 1551.536559] (detected by 0, t=84522 jiffies, g=20611, c=20610, q=0) [ 1551.536645] INFO: Stall ended before state dump start
While it's apparently a non-problem, it's pretty noisy. Any ideas?
Dave
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