Messages in this thread | | | Date | Thu, 23 Apr 2015 10:27:56 -0600 | From | Jens Axboe <> | Subject | Re: [PATCH v1 0/2] blk-mq: fix oops caused by CPU hotplug |
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On 04/20/2015 08:00 PM, Ming Lei wrote: > Hi Guys, > > Dongsu Park reported[1] that kernel oops can be triggered easily by > CPU plug when there is pending I/O on virtio-scsi. > > Turns out two problems exist in blk-mq core code and both can trigger > oops by CPU plug: > - timeout handling vs CPU hotplug, especially unmapped hw queue tags > is still touched by timeout handler > - in case of shared tags, there is one bug about setting and checking > hctx->tags during CPU hotplug > > The two patches fix the two problem, and Dongsu has verified that > the oops is fixed with the two patches too. > > [1], http://marc.info/?t=142926389200008&r=1&w=2
Applied, thanks Ming!
-- Jens Axboe
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