On Mon, Jul 17, 2017 at 01:30:00PM +0300, Tomi Sarvela wrote: > First, tested that next-20170717 still triggers the problem when no extra > options given. Adding scsi_mod.use_blk_mq=0 makes tests work. > > Then I tried with sd.diff patched next-20170717. Works (still) with > use_blk_mq=0. Also works when no options given, so this patch avoids the > hang when using the new block-mq. > > These tests on generic Haswell 4790K desktop machine. Thanks Tomi, this seems to confirm it's runtime PM related, although I don't really understand why that's an issue. Let me spin up an implementation of RQF_PM for blk-mq and give it to you for testing.
