On a recent CURRENT bos acting as poudriere host, we face after a crash under heavy load and extensive swap usage now this lock order reversal warning on the console:
lock order reversal: 1st 0xfffff8007bdd9e00 zfs (zfs, lockmgr) @ /usr/src/sys/kern/vfs_mount.c:1018 2nd 0xfffff8034abfc070 devfs (devfs, lockmgr) @ /usr/src/sys/kern/vfs_mount.c:1029 lock order zfs -> devfs attempted at: #0 0xffffffff80f3380d at witness_checkorder+0xebd #1 0xffffffff80e8ba4b at lockmgr_xlock+0xab #2 0xffffffff80fc3e04 at _vn_lock+0x54 #3 0xffffffff80fa0e34 at vfs_domount+0xde4 #4 0xffffffff80f9f598 at vfs_donmount+0x898 #5 0xffffffff80f9ecb9 at sys_nmount+0x69 #6 0xffffffff81461255 at amd64_syscall+0x135 #7 0xffffffff814335ee at fast_syscall_common+0xf8 System: FreeBSD 13.0-CURRENT #71 r366623: Sun Oct 11 08:59:17 CEST 2020
pgp5mJtYDzyfv.pgp
Description: OpenPGP digital signature
