Hello Boyan, Boyan Penkov - 01.09.17, 17:40: > I just pulled in 4.13, with the intention of trying bfq. > > To enable bfq as a scheduler, I passed "scsi_mod.use_blk_mq=1" to > grub, and added bfq via modprobe. So far, so good: the scheduler does > turn up (vis-a-vis cat /sys/block/sda/queue/scheduler). > > If I leave the machine and it sleeps, however, it does not wake up. > This is documented: https://lkml.org/lkml/2017/7/30/3 > > It seems, based on the discussion in the thread above, that the issue > has been resolved in 4.13-rc4 and 4.13-rc7, as the two patches > mentioned there are in mainline. > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h > =v4.13-rc4&id=765e40b675a9566459ddcb8358ad16f3b8344bbe > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h > =v4.13-rc7&id=5f042e7cbd9eb > > Am I missing something here? Does 4.13 from experimental really have > these in? Should I be looking elsewhere to help resolve this?
Did you review the thread "I/O hangs after resuming from suspend-to-ram" on LKML (I think I have been epically misunderstood in this thread as it can indeed be the case that my issue is also related to blk-mq, I am currently using cfq again and machine is stable on resume from suspend)? In the end Ming Lei posted about seven more fundamental patches to fix the issue for good and I am not sure that these went in. Its late and I wanna go sleep…, but I see if I find the Message-Id of that message. Hmmm, no its not in that thread. It was in a different thread, I think Ming posted that patch series as a new thread, but I don´t find it right now. Well maybe I gave enough pointers for you to dig it up yourself. If you find anything, please let me know. I just don´t find the thread with that patch series right now. Ah, I did. Its not on LKML, but on linux-block: [PATCH 0/9] block/scsi: safe SCSI quiescing Message-Id: <[email protected]> I bet that should be enough for you to dig it out. Goodnight, -- Martin
