> On Jan 22, 2018, at 20:20, Jens Axboe <axboe@xxxxxxxxx> wrote: > > All of these are off the blk-wbt completion path. I suggested earlier to > try and disable CONFIG_BLK_WBT to see if it goes away, or at least to > see if the pattern changes. Hi Jens, Bingo! Disabling CONFIG_BLK_WBT makes the problem go away. > >> I’m open to trying anything at this point. Thanks for helping, > > I'd try other types of stress testing. Has the machine otherwise been > stable, or is it a new box? It is a new box. Other than the CONFIG_BLK_WBT problem, it handles stress just fine. If you want to debug this further, I’m willing to run instrumented code. Thanks for helping me, Dave
