On Tue, 2018-02-06 at 09:37 +0100, Oleksandr Natalenko wrote: > Hi. > > 06.02.2018 08:56, Mike Galbraith wrote: > > I was doing kbuilds, and it blew up on me twice. Switching back to cfq > > seemed to confirm it was indeed the patch causing trouble, but that's > > by no means a certainty. > > Just to note, I was using v4.15.1, not the latest git HEAD. Are you able > to reproduce it on the stable kernel? I didn't even try to wedge it into 4.15.1, tested it as posted. > Also, assuming this issue might be > unrelated to the BFQ itself, did you manage to reproduce the trouble > with another blk-mq scheduler (not CFQ, but mq-deadline/Kyber)? I can give another scheduler a go this afternoon. -Mike