On 10/09/2017 05:11 AM, Paolo Valente wrote: > Hi Jens, > unfortunately, the patch "block, bfq: decrease burst size when queues > in burst exit", queued for 4.15 [1] introduces a bug, described in > detail in the commit message of this patch. If triggered, this bug may > cause loss of control on I/O-request service order. Applied, but please remember to add a Fixes line when you have a patch that fixes a problem introduced by a previous patch. For this one, I added: Fixes: 7cb04004fa37 ("block, bfq: decrease burst size when queues in burst exit") -- Jens Axboe