linux-kernel - Re: [PATCH RFC 2/7] md/raid0: convert raid0_handle_discard() to use bio_submit

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Message-ID: <aKxBgNQXphpa1BNt@infradead.org>
Date: Mon, 25 Aug 2025 03:57:04 -0700
From: Christoph Hellwig <hch@...radead.org>
To: Yu Kuai <yukuai1@...weicloud.com>
Cc: hch@...radead.org, colyli@...nel.org, hare@...e.de, tieren@...as.com,
	axboe@...nel.dk, tj@...nel.org, josef@...icpanda.com,
	song@...nel.org, yukuai3@...wei.com, akpm@...ux-foundation.org,
	neil@...wn.name, linux-block@...r.kernel.org,
	linux-kernel@...r.kernel.org, cgroups@...r.kernel.org,
	linux-raid@...r.kernel.org, yi.zhang@...wei.com,
	yangerkun@...wei.com, johnny.chenyi@...wei.com
Subject: Re: [PATCH RFC 2/7] md/raid0: convert raid0_handle_discard() to use
 bio_submit_split()

On Mon, Aug 25, 2025 at 05:36:55PM +0800, Yu Kuai wrote:
> +		bio = bio_submit_split(bio,
> +				zone->zone_end - bio->bi_iter.bi_sector,
> +				&mddev->bio_set);

Do you know why raid0 and linear use mddev->bio_set for splitting
instead of their own split bio_sets like raid1/10/5?  Is this safe?

Otherwise this looks nice.