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Date:   Tue, 23 Nov 2021 23:22:38 -0800
From:   "hch@infradead.org" <hch@infradead.org>
To:     Qu Wenruo <quwenruo.btrfs@gmx.com>
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Subject: Re: Any bio_clone_slow() implementation which doesn't share
 bi_io_vec?
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On Tue, Nov 23, 2021 at 11:02:52PM -0800, hch@infradead.org wrote:
> > Does it mean as long as our splitted bio doesn't exceed zone limit, we
> > can do the convert without any further problem?
> 
> You need to look at the limits when splitting.  I have modified
> blk_bio_segment_split and exported it to deal with that.  Let me split
> those changes out cleanly and push out a branch.

Here:

http://git.infradead.org/users/hch/block.git/shortlog/refs/heads/zone-append-split