On Mon, Jun 03, 2019 at 01:36:11PM -0400, Josef Bacik wrote: > > For v4.20, it will fail at the rate around 0/25 ~ 2/25 (very rare). > > But at that patch (upstream commit > > 302167c50b32e7fccc98994a91d40ddbbab04e52), the failure rate raise to 25/25. > > > > Any idea for that ENOSPC problem? > > As it looks really wired for the 2nd full balance to fail even we have > > enough unallocated space. > > > > I've been running this all morning on kdave's misc-next and not had a single > failure. I ran it a few times on spinning rust and a few times on my nvme > drive. I wouldn't doubt that it's failing for you, but I can't reproduce. It > would be helpful to know where the ENOSPC was coming from so I can think of > where the problem might be. Thanks, That's interesting because the test btrfs/156 hasn't succesfully finished a single run on my VM testing setup since qemu 4.0 implemented discard on virtio devices several weeks ago. It's 4cpu/2g, file-backed virtio-scsi devices, files are on a spinning disk.
