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Date:   Mon, 25 Apr 2022 13:19:25 +0200
From:   Christoph Hellwig <hch@lst.de>
To:     Qu Wenruo <quwenruo.btrfs@gmx.com>
Cc:     Christoph Hellwig <hch@lst.de>, Josef Bacik <josef@toxicpanda.com>,
        David Sterba <dsterba@suse.com>, Qu Wenruo <wqu@suse.com>,
        Naohiro Aota <naohiro.aota@wdc.com>,
        linux-btrfs@vger.kernel.org
Subject: Re: [PATCH 03/10] btrfs: split btrfs_submit_data_bio
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On Mon, Apr 25, 2022 at 07:16:21PM +0800, Qu Wenruo wrote:
> I'm wondering how would you iterate the bvec of a cloned bio then.

We just stop doing that.  All iteration should be on the originally
constructed bio.  I've fixed the two places that are doing that right
in work in progress patches.