Re: [PATCH v5 07/10] md/raid1,raid10: skip futile retries on P2PDMA mapping failures
From: Logan Gunthorpe <logang@deltatee.com>
Date: 2026-07-24 15:13:26
Also in:
linux-block, linux-nvme, linux-pci, linux-rdma, lkml, stable
On 2026-07-23 2:42 p.m., Mykola Marzhan wrote:
BLK_STS_P2PDMA reflects the peer/member pairing, not member health:
retrying the same pages on the same member cannot succeed. Keep
WriteErrorSeen so the range stays fenced, but skip WantReplacement and
FailFast eviction, as commit f7b24c7b41f2 ("md/raid1,raid10: don't fail
devices for invalid IO errors") did for BLK_STS_INVAL.
The failure is whole-range and deterministic, so narrow_write_error()'s
block-by-block submit_bio_wait() retries are pointless. Record the
whole range as a bad block in the completion handler instead.
Fixes: 02666132403a ("md: propagate BLK_FEAT_PCI_P2PDMA from member devices to RAID device")
Assisted-by: Claude:claude-fable-5
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Mykola Marzhan <redacted>Change my no longer correct first Signed-off-by to: Reviewed-by: Logan Gunthorpe <logang@deltatee.com> Logan