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 0xf8007bdd9e00 zfs (zfs, lockmgr) @
/usr/src/sys/kern/vfs_mount.c:1018 2nd 0xf8034abfc070 devfs
On 06/10/2020 21:29, Graham Perrin wrote:
lsof finds no open file.
How else might I tell why the device is busy?
Mobile hard disk drive, USB.
The same problem this morning,
root@momh167-gjp4-8570p:~ # zpool export Transcend
cannot unmount '/Volumes/t500': umount failed
