On Fri, 2017-04-07 at 12:23 -0600, Jens Axboe wrote: > On 04/07/2017 12:16 PM, Bart Van Assche wrote: > > Hello Jens, > > > > The six patches in this patch series fix the queue lockup I reported > > recently on the linux-block mailing list. Please consider these patches > > for inclusion in the upstream kernel. > > Some of this we need in 4.11, but not all of it. I can't be applying patches > that "improve scalability" at this point. > > 4-6 looks like what we want for 4.11, I'll see if those apply directly. Then > we can put 1-3 on top in 4.12, with the others pulled in first. Hello Jens, Please note that patch 2/6 is a bug fix. The current implementation of blk_mq_sched_restart_queues() only considers hardware queues associated with the same request queue as the hardware queue that has been passed as an argument. If a tag set is shared across request queues - as is the case for SCSI - then all request queues that share a tag set with the hctx argument must be considered. Bart.
