From: Logan Gunthorpe <logang@deltatee.com>
To: Mykola Marzhan <mykola@meshstor.io>, Jens Axboe <axboe@kernel.dk>,
Song Liu <song@kernel.org>, Yu Kuai <yukuai@fygo.io>,
Keith Busch <kbusch@kernel.org>, Christoph Hellwig <hch@lst.de>,
Sagi Grimberg <sagi@grimberg.me>,
linux-block@vger.kernel.org, linux-raid@vger.kernel.org,
linux-nvme@lists.infradead.org
Cc: Li Nan <magiclinan@didiglobal.com>, Xiao Ni <xiao@kernel.org>,
Guoqing Jiang <guoqing.jiang@linux.dev>,
Leon Romanovsky <leon@kernel.org>, Jason Gunthorpe <jgg@ziepe.ca>,
Kiran Kumar Modukuri <kmodukuri@nvidia.com>,
Chaitanya Kulkarni <kch@nvidia.com>,
Bjorn Helgaas <bhelgaas@google.com>,
Shivaji Kant <shivajikant@google.com>,
Pranjal Shrivastava <praan@google.com>,
Henrique Carvalho <henrique.carvalho@suse.com>,
stable@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-rdma@vger.kernel.org, linux-pci@vger.kernel.org
Subject: Re: [PATCH v5 07/10] md/raid1,raid10: skip futile retries on P2PDMA mapping failures
Date: Fri, 24 Jul 2026 09:11:43 -0600 [thread overview]
Message-ID: <47954eca-63e6-401b-82d7-d5969207ded9@deltatee.com> (raw)
In-Reply-To: <20260723204206.76930-8-mykola@meshstor.io>
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 <mykola@meshstor.io>
Change my no longer correct first Signed-off-by to:
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Logan
next prev parent reply other threads:[~2026-07-24 15:13 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-23 20:41 [PATCH v5 00/10] block,md,nvme: correct handling of unsupported P2PDMA transfers Mykola Marzhan
2026-07-23 20:41 ` [PATCH v5 01/10] block: add BLK_STS_P2PDMA for unsupported peer-to-peer transfers Mykola Marzhan
2026-07-23 20:41 ` [PATCH v5 02/10] md: ensure REQ_NOMERGE is set on P2PDMA bios Mykola Marzhan
2026-07-23 20:41 ` [PATCH v5 03/10] md/raid1: serialize non-write-behind writes on CollisionCheck rdevs Mykola Marzhan
2026-07-23 20:42 ` [PATCH v5 04/10] md/raid1: don't use write-behind for P2PDMA bios Mykola Marzhan
2026-07-23 20:42 ` [PATCH v5 05/10] md/raid1,raid10: factor out raid1_write_error() helper Mykola Marzhan
2026-07-23 20:42 ` [PATCH v5 06/10] md/raid1,raid10: keep REQ_NOMERGE on narrow_write_error() retry clones Mykola Marzhan
2026-07-23 20:42 ` [PATCH v5 07/10] md/raid1,raid10: skip futile retries on P2PDMA mapping failures Mykola Marzhan
2026-07-24 15:11 ` Logan Gunthorpe [this message]
2026-07-23 20:42 ` [PATCH v5 08/10] md/raid1,raid10: set IO_BLOCKED in case of BLK_STS_P2PDMA Mykola Marzhan
2026-07-23 20:42 ` [PATCH v5 09/10] nvme-rdma: use ib_dma_map_sgtable_attrs() Mykola Marzhan
2026-07-24 18:47 ` Logan Gunthorpe
2026-07-23 20:42 ` [PATCH v5 10/10] nvme-rdma: return BLK_STS_P2PDMA for unsupported P2P transfers Mykola Marzhan
2026-07-24 18:50 ` Logan Gunthorpe
2026-07-24 10:21 ` [PATCH v5 00/10] block,md,nvme: correct handling of unsupported P2PDMA transfers Thorsten Leemhuis
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