On 09/26/2015 11:09 AM, Akinobu Mita wrote:
This patchset addresses several race conditions on cpu hotplug handling for blk-mq. All problems can be reproducible by the following script.while true; do echo 0 > /sys/devices/system/cpu/cpu1/online echo 1 > /sys/devices/system/cpu/cpu1/online done & while true; do modprobe -r null_blk modprobe null_blk queue_mode=2 irqmode=1 sleep 0.1 done * Changes from v3 - Rebased to the latest kernel - Add Reviewed-by tags
I've reviewed the patches, looks good to me. I've skipped 6/7, as I think we should fix that as part of the percpu ref counting, and not handle it specifically in blk-mq. If we can't get that fix before 4.3 wraps up, then we can revisit and put that in as well.
Thanks! -- 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/
