On Wed, Jul 05, 2017 at 02:17:24AM -0600, Jan Beulich wrote : > >>> On 05.07.17 at 10:08, <vincent.leg...@gandi.net> wrote: > > Without the patch, blkif_release and xlvbd_release_gendisk are never > > called, and no call to blk_unregister_queue is made. > > But isn't that what needs to be fixed then? The device should be > removed once its last user goes away (which would be at the time > the umount is eventually done aiui).
You mean that block-detach should fail if the device is still mounted? or find a way to wait until all the users are gone? I don't say that's not what should be done, but that's not what I get. The device is removed after a block-detach, even if still mounted. So the system is left in an unstable state without the patch. I also just saw the --force option of xl block-detach, but from a quick look it seems this option was actually only in xm and never in xl. Vincent