On Fri, Jul 1, 2016 at 9:51 PM, Chris Murphy <lists@xxxxxxxxxxxxxxxxx> wrote: > This is interesting: > > Jul 01 11:56:40 kernel: BTRFS info (device nvme0n1p5): relocating > block group 232511242240 flags 1 > > a. It's an NVMe drive. > b. Btrfs at this time is involved in a balance operation of some sort. The balance operation is one I started manually. It's a coincidence that it's running at this point and I don't believe it's related to the lockups because 1) I saw the lockups on a previous baobab scan of my /var/lib/docker/btrfs/subvolumes when no balance was taking place and 2) after removing all of docker's subvolumes, the problem has gone away > > > And then what you previously reported, the parts of which I don't follow: > > Jul 01 12:00:31 kernel: NMI watchdog: BUG: soft lockup - CPU#0 stuck > for 22s! [scanner:7121] I'd guess this is the kernel's protection mechanism to try to recover when come critical (blocking) thread does not return, looks like it's essentially killing the process when a watchdog timer expires. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
