Re: occasional failure to unmap rbd

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What about /sys/block/krbdX/holders? Nothing in there?

Jan

> On 25 Sep 2015, at 19:44, Jeff Epstein <jeff.epstein@xxxxxxxxxxxxxxxx> wrote:
> 
> On 09/25/2015 12:53 PM, Jan Schermer wrote:
>> What are you looking for in lsof? Did you try looking for the major/minor number of the rbd device?
>> Things that could hold the device are devicemapper, lvm, swraid and possibly many more, not sure if all that shows in lsof output...
>> 
> I searched for the rbd's mounted block device name, of course, which didn't turn up anything. Just now I tried searching for the minor device number, but I didn't see anything obviously useful. lsof usually just shows processes, so if the the device is being held by a kernel module or inaccurate refcount, lsof wouldn't help.
> 
> Jeff

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