[dm-devel] [PATCH 4/8] block: support delayed holder registration

[Mike Snitzer]

On Sun, Jul 25 2021 at  1:54P -0400,
Christoph Hellwig <hch at lst.de> 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 has all kinds
> of bad side effects.  Support registering holders on an initialized but
> not registered disk instead by delaying the sysfs registration until the
> disk is registered.

Maybe expand "bad side effects" in header to include what you detailed here?:
https://listman.redhat.com/archives/dm-devel/2021-July/msg00130.html

Reviewed-by: Mike Snitzer <snitzer at redhat.com>