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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
