From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 68FE4470E97; Wed, 22 Jul 2026 19:07:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784747240; cv=none; b=EGB2US1kPg8dgNpzGl+VCy69E716ASj4fDr3eSsr/14U//QFlWWebjmwtPFqnKF6X5l8xLm0AZBh6SwrQFTjSGOlppOrq7QM2fUzShR1QmeSWVlffn8zzfDeaMTFMWwwd4jepEbWdU/579BTYoUx/Agj7i0Okrb6TnOaBSAU9gA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784747240; c=relaxed/simple; bh=YLXTr3+lfCt5Fy/pNHCD5fN5v7ifhRSAjSbI8Hgh39U=; h=From:Subject:To:Cc:In-Reply-To:References:Content-Type:Date: Message-Id; b=F5G1VdNpkY3dyDBmTSYFSUHt+Yj75/dDvn01CFd/TcKlWtvo3XZWJHhs/a1yXAbVkpQ2BQsn8zXw0yFQOD9XdWsBYQAiD6dmUdMahGH6XLFjxoedqBIzmQbotOoUR81m8f/u8NCYsytgM71rq2wTXvmxz29HeaR2sPdIeKOoYGA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=kJ2TTJix; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="kJ2TTJix" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C71251F000E9; Wed, 22 Jul 2026 19:07:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1784747239; bh=Hf15RTMsFmXGPHnfwzyWY8HZECZHsw+hEuLHjd45GBE=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=kJ2TTJix2SZBcQNJNZije6lctrFVV7gCihwILpt/CEBLfyLqNlUnHWKSpyeQTfh9a VDAPUyEgahC8QHGYYtM+yDldAzBg86dUhv67yWLAonSr8ab5v5tA6WNbo4GOSLe+DX iRL3z6zSpVNuwNREm5mFV3OT31lIzU5xJiQlOzAIUP3Knl69ojes8iQ3esQH3mO3Vc Ugcl9MkLnZ6hUGglEMzHkkrtPwK84SlUPTjhdftxhR4O4fTXkFa+jST/M0JOFEH1by bQhNCFfmFsiJu7DdANrHJ7NijwCMEshoXRRwEqg4N6yx0wD53roXMulnZVEKbhD6ha 7OrfOMvqWcOCg== From: sashiko-bot@kernel.org Subject: Re: [PATCH v4 2/9] md: ensure REQ_NOMERGE is set on P2PDMA bios Reply-To: sashiko-reviews@lists.linux.dev To: "Mykola Marzhan" Cc: yukuai@fygo.io, linux-pci@vger.kernel.org, linux-raid@vger.kernel.org In-Reply-To: <20260722185841.449934-3-mykola@meshstor.io> References: <20260722185841.449934-1-mykola@meshstor.io> <20260722185841.449934-3-mykola@meshstor.io> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Wed, 22 Jul 2026 19:07:18 +0000 Message-Id: <20260722190718.C71251F000E9@smtp.kernel.org> Precedence: bulk X-Mailing-List: linux-raid@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: > 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. >=20 > Fixes: 02666132403a ("md: propagate BLK_FEAT_PCI_P2PDMA from member devic= es to RAID device") > Assisted-by: Claude:claude-opus-4-8 > Signed-off-by: Mykola Marzhan Sashiko has reviewed this patch and found no issues. It looks great! --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20260722185841.4499= 34-1-mykola@meshstor.io?part=3D2