Many accumulated. For example: ``` brw-rw---- 1 root disk 252, 0 Aug 6 19:36 /dev/dm-0 brw-rw---- 1 root disk 252, 1 Aug 5 20:15 /dev/dm-1 brw-rw---- 1 root disk 252, 10 Oct 6 09:47 /dev/dm-10 brw-rw---- 1 root disk 252, 11 Jul 30 13:00 /dev/dm-11 brw-rw---- 1 root disk 252, 12 Jul 30 12:59 /dev/dm-12 brw-rw---- 1 root disk 252, 13 Sep 30 16:54 /dev/dm-13 brw-rw---- 1 root disk 252, 14 Aug 25 15:07 /dev/dm-14 brw-rw---- 1 root disk 252, 15 Oct 23 16:37 /dev/dm-15 brw-rw---- 1 root disk 252, 16 Jul 30 12:56 /dev/dm-16 brw-rw---- 1 root disk 252, 17 Oct 7 18:35 /dev/dm-17 brw-rw---- 1 root disk 252, 19 Aug 17 02:09 /dev/dm-19 brw-rw---- 1 root disk 252, 2 Aug 7 14:19 /dev/dm-2 brw-rw---- 1 root disk 252, 20 Oct 19 21:11 /dev/dm-20 brw-rw---- 1 root disk 252, 21 Aug 17 02:09 /dev/dm-21 brw-rw---- 1 root disk 252, 22 Oct 19 22:38 /dev/dm-22 brw-rw---- 1 root disk 252, 23 Oct 19 21:26 /dev/dm-23 brw-rw---- 1 root disk 252, 24 Jul 30 12:52 /dev/dm-24 brw-rw---- 1 root disk 252, 25 Oct 19 21:40 /dev/dm-25 brw-rw---- 1 root disk 252, 26 Oct 11 21:22 /dev/dm-26 brw-rw---- 1 root disk 252, 27 Oct 19 21:57 /dev/dm-27 brw-rw---- 1 root disk 252, 28 Sep 18 13:20 /dev/dm-28 brw-rw---- 1 root disk 252, 29 Oct 19 21:23 /dev/dm-29 brw-rw---- 1 root disk 252, 3 Jul 30 14:33 /dev/dm-3 brw-rw---- 1 root disk 252, 30 Oct 19 21:12 /dev/dm-30 brw-rw---- 1 root disk 252, 31 Oct 19 21:27 /dev/dm-31 brw-rw---- 1 root disk 252, 32 Jul 30 12:56 /dev/dm-32 brw-rw---- 1 root disk 252, 33 Oct 20 00:36 /dev/dm-33 brw-rw---- 1 root disk 252, 34 Oct 20 00:13 /dev/dm-34 brw-rw---- 1 root disk 252, 35 Oct 19 22:41 /dev/dm-35 brw-rw---- 1 root disk 252, 36 Sep 18 13:21 /dev/dm-36 brw-rw---- 1 root disk 252, 37 Oct 19 22:40 /dev/dm-37 brw-rw---- 1 root disk 252, 38 Oct 20 14:51 /dev/dm-38 brw-rw---- 1 root disk 252, 39 Oct 21 22:59 /dev/dm-39 brw-rw---- 1 root disk 252, 4 Jul 30 12:58 /dev/dm-4 brw-rw---- 1 root disk 252, 40 Oct 23 15:56 /dev/dm-40 brw-rw---- 1 root disk 252, 41 Oct 19 23:36 /dev/dm-41 brw-rw---- 1 root disk 252, 42 Oct 20 00:16 /dev/dm-42 brw-rw---- 1 root disk 252, 5 Aug 12 15:36 /dev/dm-5 brw-rw---- 1 root disk 252, 6 Aug 25 15:11 /dev/dm-6 brw-rw---- 1 root disk 252, 62 Aug 4 15:11 /dev/dm-62 brw-rw---- 1 root disk 252, 7 Aug 25 15:22 /dev/dm-7 brw-rw---- 1 root disk 252, 8 Sep 4 18:01 /dev/dm-8 brw-rw---- 1 root disk 252, 9 Jul 30 12:59 /dev/dm-9 root:koala:/var/log/# grep busy mxqd_log device-mapper: remove ioctl on mxq.60579869 failed: Device or resource busy device-mapper: remove ioctl on mxq.60580705 failed: Device or resource busy device-mapper: remove ioctl on mxq.60584653 failed: Device or resource busy device-mapper: remove ioctl on mxq.60606442 failed: Device or resource busy device-mapper: remove ioctl on mxq.60607173 failed: Device or resource busy device-mapper: remove ioctl on mxq.60607222 failed: Device or resource busy device-mapper: remove ioctl on mxq.60607980 failed: Device or resource busy device-mapper: remove ioctl on mxq.60608227 failed: Device or resource busy device-mapper: remove ioctl on mxq.60608235 failed: Device or resource busy device-mapper: remove ioctl on mxq.60609150 failed: Device or resource busy device-mapper: remove ioctl on mxq.60610218 failed: Device or resource busy device-mapper: remove ioctl on mxq.60612952 failed: Device or resource busy device-mapper: remove ioctl on mxq.60613098 failed: Device or resource busy device-mapper: remove ioctl on mxq.60612980 failed: Device or resource busy device-mapper: remove ioctl on mxq.60616888 failed: Device or resource busy device-mapper: remove ioctl on mxq.60619410 failed: Device or resource busy device-mapper: remove ioctl on mxq.60619621 failed: Device or resource busy device-mapper: remove ioctl on mxq.60620874 failed: Device or resource busy device-mapper: remove ioctl on mxq.60627712 failed: Device or resource busy device-mapper: remove ioctl on mxq.60633577 failed: Device or resource busy device-mapper: remove ioctl on mxq.60647660 failed: Device or resource busy ``` Maybe the `unmount -l` in `tmpdir-setup` takes too long? Relicts removed on all nodes with `dmsetup ls|perl -lane 'print "dmsetup remove $F[0]"' | sh -x`.