On Sat, Aug 14, 2021 at 02:13:09PM -0700, Guenter Roeck wrote: > On Wed, Aug 04, 2021 at 11:41:43AM +0200, Christoph Hellwig wrote: > > device mapper needs to register holders before it is ready to do I/O. > > Currently it does so by registering the disk early, which can leave > > the disk and queue in a weird half state where the queue is registered > > with the disk, except for sysfs and the elevator. And this state has > > been a bit promlematic before, and will get more so when sorting out > > the responsibilities between the queue and the disk. > > > > Support registering holders on an initialized but not registered disk > > instead by delaying the sysfs registration until the disk is registered. > > > > Signed-off-by: Christoph Hellwig <hch@xxxxxx> > > Reviewed-by: Mike Snitzer <snitzer@xxxxxxxxxx> > > This patch results in lockdep splats when booting from flash. > Reverting it fixes the proboem. Should be fixed by: https://git.kernel.dk/cgit/linux-block/commit/?h=for-5.15/drivers&id=6e4df4c6488165637b95b9701cc862a42a3836ba
