Re: [PATCH v6 02/12] md: ensure REQ_NOMERGE is set on P2PDMA bios
From: sashiko-bot@kernel.org
Date: 2026-07-26 11:59:04
Also in:
linux-pci
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 <redacted>Sashiko has reviewed this patch and found no issues. It looks great! -- Sashiko AI review · https://sashiko.dev/#/patchset/20260726113229.2154269-1-mykola@meshstor.io?part=2