On 5 Dec 2018, at 5:59, Andrea Gelmini wrote: > On Tue, Dec 04, 2018 at 10:29:49PM +0000, Chris Mason wrote: >> I think (hope) this is: >> >> https://bugzilla.kernel.org/show_bug.cgi?id=201685 >> >> Which was just nailed down to a blkmq bug. It triggers when you have >> scsi devices using elevator=none over blkmq. > > Thanks a lot Chris. Really. > Good news: I confirm I recompiled and used blkmq and no-op (at that > time). > Also, the massive write of btrfs defrag can explain the massive > trigger of > the bug, and next corruption.
Sorry this happened, but glad you were able to confirm that it explains the trouble you hit. Thanks for the report, I did end up using this as a datapoint to convince myself the bugzilla above wasn't ext4 specific. -chris
