On Fri, 2017-04-07 at 11:33 -0700, Bart Van Assche wrote: > 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.
(replying to my own e-mail) Hello Jens, If you want I can split that patch into two patches - one that runs all hardware queues with which the tag set is shared and one that switches from rerunning all hardware queues to one hardware queue. Bart.
