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Date:   Sat, 23 Apr 2022 09:55:29 -0700
From:   Christoph Hellwig <hch@infradead.org>
To:     Mike Snitzer <snitzer@kernel.org>
Cc:     linux-block@vger.kernel.org, Christoph Hellwig <hch@infradead.org>,
        Dennis Zhou <dennis@kernel.org>, tj@kernel.org,
        axboe@kernel.dk, dm-devel@redhat.com
Subject: Re: [PATCH] block: remove redundant blk-cgroup init from __bio_clone
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So while I'm still diving into the somewhat invasive changes to
optimize some of the cloning all we might relaly need for your
use case should be this:

http://git.infradead.org/users/hch/block.git/shortlog/refs/heads/blk-clone-no-bdev

Can you check if this helps you?