Messages in this thread |  | | Date | Wed, 13 Nov 2013 16:38:06 +0900 | From | Tejun Heo <> | Subject | Re: Possible regression with cgroups in 3.11 |
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Hey, guys.
cc'ing people from "workqueue, pci: INFO: possible recursive locking detected" thread.
http://thread.gmane.org/gmane.linux.kernel/1525779
So, to resolve that issue, we ripped out lockdep annotation from work_on_cpu() and cgroup is now experiencing deadlock involving work_on_cpu(). It *could* be that workqueue is actually broken or memcg is looping but it doesn't seem like a very good idea to not have lockdep annotation around work_on_cpu().
IIRC, there was one pci code path which called work_on_cpu() recursively. Would it be possible for that path to use something like work_on_cpu_nested(XXX, depth) so that we can retain lockdep annotation on work_on_cpu()?
Thanks.
-- tejun
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