On Tue, 18 Jan 2022 08:04:44 +0100, Christoph Hellwig wrote:
> bio_clone_fast() sets the cloned bio to have the same ->bi_bdev as the
> source bio. This means that when request-based dm called setup_clone(),
> the cloned bio had its ->bi_bdev pointing to the dm device. After Commit
> 0b6e522cdc4a ("blk-mq: use ->bi_bdev for I/O accounting")
> __blk_account_io_start() started using the request's ->bio->bi_bdev for
> I/O accounting, if it was set. This caused IO going to the underlying
> devices to use the dm device for their I/O accounting.
>
> [...]
Applied, thanks!
[1/1] block: assign bi_bdev for cloned bios in blk_rq_prep_clone
commit: fd9f4e62a39f09a7c014d7415c2b9d1390aa0504
Best regards,
--
Jens Axboe
