On Mon, Sep 01, 2025 at 11:32:09AM +0800, Yu Kuai wrote:
> From: Yu Kuai <yukuai3@huawei.com>
> 
> 1) trace_block_split() is missing and blktrace can't catch split events;
> 2) blkcg_bio_issue_init() is missing, and io-latency will not work
>    correctly for split bio.

Looks good:

Reviewed-by: Christoph Hellwig <hch@lst.de>