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| author | Joe Lawrence <joe.lawrence@stratus.com> | 2014-10-05 13:24:21 -0400 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2014-10-06 05:57:43 -0700 |
| commit | 789cbbeca4eb7141cbd748ee93772471101b507b (patch) | |
| tree | 357a38595c99840947212b6ec89a7a6d4ada2aee /net/openvswitch | |
| parent | c98fed9fc6a7449affd941d8a8e9fcb0c72977d6 (diff) | |
| download | linux-789cbbeca4eb7141cbd748ee93772471101b507b.tar.gz linux-789cbbeca4eb7141cbd748ee93772471101b507b.tar.bz2 linux-789cbbeca4eb7141cbd748ee93772471101b507b.zip | |
workqueue: Add quiescent state between work items
Similar to the stop_machine deadlock scenario on !PREEMPT kernels
addressed in b22ce2785d97 "workqueue: cond_resched() after processing
each work item", kworker threads requeueing back-to-back with zero jiffy
delay can stall RCU. The cond_resched call introduced in that fix will
yield only iff there are other higher priority tasks to run, so force a
quiescent RCU state between work items.
Signed-off-by: Joe Lawrence <joe.lawrence@stratus.com>
Link: https://lkml.kernel.org/r/20140926105227.01325697@jlaw-desktop.mno.stratus.com
Link: https://lkml.kernel.org/r/20140929115445.40221d8e@jlaw-desktop.mno.stratus.com
Fixes: b22ce2785d97 ("workqueue: cond_resched() after processing each work item")
Cc: <stable@vger.kernel.org>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'net/openvswitch')
0 files changed, 0 insertions, 0 deletions