Re: [PATCH RFC 4/4] md/raid0: Atomic write support

Christoph Hellwig
2024-09-12T13:18:07Z

On Tue, Sep 03, 2024 at 03:07:48PM +0000, John Garry wrote:
> if (sectors < bio_sectors(bio)) {
> - struct bio *split = bio_split(bio, sectors, GFP_NOIO,
> + struct bio *split;
> +
> + if (bio->bi_opf & REQ_ATOMIC)
> + return false;

I guess this is the erroring out when attempting to split the request.
Can you add a comment to explain that and why it can't happen for the
normal I/O patterns?