[PATCH] nvme-multipath: set BIO_REMAPPED on bios remapped to per-path namespace disks

[Keith Busch]

On Mon, May 18, 2026 at 02:52:56PM +0000, Achkinazi, Igor wrote:
> @@ -511,6 +511,13 @@ static void nvme_ns_head_submit_bio(struct bio *bio)
>         ns = nvme_find_path(head);
>         if (likely(ns)) {
>                 bio_set_dev(bio, ns->disk->part0);
> +               /*
> +                * Mark the bio as remapped to the per-path namespace disk so
> +                * that bio_check_eod() is skipped on resubmission (e.g. from
> +                * bio splitting in blk_mq_submit_bio).  The EOD check already
> +                * passed on the multipath head disk.
> +                */
> +               bio_set_flag(bio, BIO_REMAPPED);

Any reason nvme multipath can't call submit_bio_noacct_nocheck()
directly instead? If it's safe to skip the eod check here, then it
looks safe to skip everything else too.