Re: [PATCH v6 02/12] md: ensure REQ_NOMERGE is set on P2PDMA bios
[email protected] Sun, 26 Jul 2026 11:59:04 +0000
| Newsgroups | org.kernel.vger.linux-raid,org.kernel.vger.linux-pci |
|---|---|
| Message-ID | <[email protected]> |
> md_submit_bio() strips REQ_NOMERGE from every bio. For P2PDMA bios
> the flag is what keeps requests single-provider (see
> __bio_add_page()): merging a P2PDMA bio with one over a different
> pgmap, or over host memory, maps the merged request with the wrong
> bus address. Set the flag on P2PDMA bios -- bios built via
> bio_iov_bvec_set() arrive without it -- and keep stripping it
> otherwise.
>
> Fixes: 02666132403a ("md: propagate BLK_FEAT_PCI_P2PDMA from member devices to RAID device")
> Assisted-by: Claude:claude-opus-4-8
> Signed-off-by: Mykola Marzhan <[email protected]>
Sashiko has reviewed this patch and found no issues. It looks great!
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Sashiko AI review ยท https://sashiko.dev/#/patchset/[email protected]?part=2