On Wed, Jul 22, 2020 at 07:03:21AM +0000, Johannes Thumshirn wrote: > On 22/07/2020 08:28, Christoph Hellwig wrote: > > Ever since the switch to blk-mq, a lower device not use by VM > in-use/used? ~^ Yeah, this should be used. > Also this looks like the last user of 'dev_lower_blocked' so it could > be removed from device_statistics if it's not an ABI (not sure with this > netlink stuff). As far as I can tell this is a netlink user ABI.