On Mon, Nov 05, 2018 at 01:10:21PM -0500, Brian Foster wrote: > When online discard is enabled, discards of busy extents are > submitted asynchronously as a bio chain. bio completion and > resulting busy extent cleanup is deferred to a workqueue. Async > discard submission is intended to avoid blocking log forces on a > full discard sequence which can take a noticeable amount of time in > some cases. > > We've had reports of this still producing log force stalls with XFS > on VDO, Please fix this in VDO instead. We should not work around out of tree code making stupid decisions.
