On Mon, Jan 25, 2021 at 10:53:36AM -0700, Jens Axboe wrote:

On Sun, Jan 24, 2021 at 3:05 AM Christoph Hellwig [off-list ref] wrote:

quoted

There is no good reason to reassign ->bi_bdev when remapping the
partition-relative block number to the device wide one, as all the
information required by the drivers comes from the gendisk anyway.

Keeping the original ->bi_bdev alive will allow to greatly simplify
the partition-away I/O accounting.

This one causes boot failures for me on my laptop...

Any output to share?  Details of the config?