On Fri, 2017-04-07 at 16:50 -0700, Bart Van Assche wrote:
> If blk_get_request() returns ENODEV then multipath_clone_and_map()
> causes a request to be requeued immediately. This can cause a
> kworker thread to spend 100% of the CPU time of a single core in
> __blk_mq_run_hw_queue() and also can ca
If blk_get_request() returns ENODEV then multipath_clone_and_map()
causes a request to be requeued immediately. This can cause a
kworker thread to spend 100% of the CPU time of a single core in
__blk_mq_run_hw_queue() and also can cause device removal to
never finish.
Avoid this by only requeuing
