On Fri, Sep 09, 2022 at 11:14:41AM +1000, Chris Dunlop wrote:
What can make a "rbd unmap" fail, assuming the device is not mounted
and not (obviously) open by any other processes?
I have multiple XFS on rbd filesystems, and often create rbd
snapshots, map and read-only mount the snapshot, perform some work on
the fs, then unmount and unmap. The unmap regularly (about 1 in 10
times) fails like:
$ sudo rbd unmap /dev/rbd29
rbd: sysfs write failed
rbd: unmap failed: (16) Device or resource busy
FYI, this was resolved:
https://www.spinics.net/lists/ceph-devel/msg55943.html
Chris
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