Messages in this thread | | | Date | Mon, 18 Nov 2019 10:00:00 +0100 | From | Sebastian Andrzej Siewior <> | Subject | Re: linux-next: manual merge of the workqueues tree with the tip tree |
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On 2019-11-18 15:08:58 [+1100], Stephen Rothwell wrote: > Hi all, Hi,
> Today's linux-next merge of the workqueues tree got a conflict in: > > kernel/workqueue.c > > between commit: > > 5a6446626d7e ("workqueue: Convert for_each_wq to use built-in list check") > > from the tip tree and commit: > > 49e9d1a9faf2 ("workqueue: Add RCU annotation for pwq list walk") > > from the workqueues tree.
urgh. So the RCU warning is introduced in commit 28875945ba98d ("rcu: Add support for consolidated-RCU reader checking")
which was merged in v5.4-rc1. I enabled it around -rc7 and saw a few warnings including in the workqueue code. I asked about this and posted later a patch which was applied by Tejun. Now I see that the tip tree has a patch for this warning… I would vote for the patch in -tip since it also removes the assert_rcu_or_wq_mutex() macro. It would be nice if this could be part of v5.4 since once the RCU warning is enabled it will yell.
Sebastian
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