>>>>> "Wols" == Wols Lists <antlists@xxxxxxxxxxxxxxx> writes: Wols> On 14/12/18 07:03, Sinisa wrote: >>> And another MD flush thread waiting on a MD sync barrier. >>> >>> Basically, this looks and smells like a MD sync barrier race >>> condition, not an XFs problem. >>> >>> Cheers, >>> >>> Dave. >> >> But why don't we see the same issue with other filesystems? Wols> Possibly because, iirc, xfs is aware of the underlying raid? I don't think it's that in touch with the raid. It can/does query for settings so it can optimize stuff, but I don't think it actually uses it other than as a block device. Wols> I don't know, but I seem to remember that from earlier discussions about Wols> "xfs over mdraid". Have you tried doing this with the absolute latest kernel?