From: sashiko-bot@kernel.org
To: "Mykola Marzhan" <mykola@meshstor.io>
Cc: yukuai@fygo.io, linux-raid@vger.kernel.org, linux-pci@vger.kernel.org
Subject: Re: [PATCH v4 7/9] md/raid1,raid10: skip futile retries on P2PDMA mapping failures
Date: Wed, 22 Jul 2026 19:10:25 +0000 [thread overview]
Message-ID: <20260722191025.95A551F000E9@smtp.kernel.org> (raw)
In-Reply-To: <20260722185841.449934-8-mykola@meshstor.io>
> From: Logan Gunthorpe <logang@deltatee.com>
>
> 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>
> Co-developed-by: Mykola Marzhan <mykola@meshstor.io>
> Signed-off-by: Mykola Marzhan <mykola@meshstor.io>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260722185841.449934-1-mykola@meshstor.io?part=7
next prev parent reply other threads:[~2026-07-22 19:10 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-22 18:58 [PATCH v4 0/9] block,md,nvme: correct handling of unsupported P2PDMA transfers Mykola Marzhan
2026-07-22 18:58 ` [PATCH v4 1/9] block: add BLK_STS_P2PDMA for unsupported peer-to-peer transfers Mykola Marzhan
2026-07-22 19:06 ` sashiko-bot
2026-07-22 18:58 ` [PATCH v4 2/9] md: ensure REQ_NOMERGE is set on P2PDMA bios Mykola Marzhan
2026-07-22 19:07 ` sashiko-bot
2026-07-22 18:58 ` [PATCH v4 3/9] md/raid1: serialize non-write-behind writes on CollisionCheck rdevs Mykola Marzhan
2026-07-22 19:14 ` sashiko-bot
2026-07-22 18:58 ` [PATCH v4 4/9] md/raid1: don't use write-behind for P2PDMA bios Mykola Marzhan
2026-07-22 19:11 ` sashiko-bot
2026-07-22 18:58 ` [PATCH v4 5/9] md/raid1,raid10: factor out raid1_write_error() helper Mykola Marzhan
2026-07-22 19:05 ` sashiko-bot
2026-07-22 18:58 ` [PATCH v4 6/9] md/raid1,raid10: keep REQ_NOMERGE on narrow_write_error() retry clones Mykola Marzhan
2026-07-22 19:16 ` sashiko-bot
2026-07-22 18:58 ` [PATCH v4 7/9] md/raid1,raid10: skip futile retries on P2PDMA mapping failures Mykola Marzhan
2026-07-22 19:10 ` sashiko-bot [this message]
2026-07-22 19:18 ` Logan Gunthorpe
2026-07-22 19:50 ` Mykola Marzhan
2026-07-22 18:58 ` [PATCH v4 8/9] md/raid1,raid10: set IO_BLOCKED in case of BLK_STS_P2PDMA Mykola Marzhan
2026-07-22 19:16 ` sashiko-bot
2026-07-22 19:19 ` Logan Gunthorpe
2026-07-22 20:02 ` Mykola Marzhan
2026-07-23 3:11 ` Logan Gunthorpe
2026-07-22 18:58 ` [PATCH v4 9/9] nvme-rdma: return BLK_STS_P2PDMA for unsupported P2P transfers Mykola Marzhan
2026-07-22 19:20 ` sashiko-bot
2026-07-22 21:59 ` Logan Gunthorpe
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