From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 12A34606A321 for ; Thu, 12 Nov 2026 16:43:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=kHuk66is; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=TaSo0gm1 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Reply-To:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Date: Content-Transfer-Encoding:Content-Type:References:In-Reply-To:Cc:To:Subject: From:Message-ID:MIME-Version:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Unsubscribe-Post:List-Owner; bh=qMPAKcfOiDx77Aw4OnsNyGUu0CKw5fyN/4q2Bj4VySY=; b=kHuk66isit+QEyPdM1qVPqnQCa aQxaq8a0NougTjn5HFsauCTzxJji/gXGiSCJPJXN2BLVG3BqQUkQuujKU7MTMLM3sIcgQezyw4/oi r02gXxDnxvQIu3csCA1FueTYz4bBJxTDtU+7ahd3u4dFgDCaEny8xF0MekvVUvVSHAI3kEuZxIkkO 9DbNipRmhUuNOm+sJRSMnwStOUk1h8yqD+C2NvsuxFYKvaLfq56Ct83nr0tSBMY4vrp5hM/J4gGrW K8dhqtjWa6yhH86LOPHXrRnsiSJzmnYJwJwf8AsmmZUdOs/BK1fhBurpBFIako2heSYTUo3Cwgd4B GxvR+IUQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xRXtV-0000000AesP-2vKi; Thu, 12 Nov 2026 16:43:25 +0000 Received: from tor.source.kernel.org ([172.105.4.254]) by bombadil.infradead.org with esmtps (Exim 4.100.1 #2 (Red Hat Linux)) id 1xRXtG-0000000Aepp-41Wl for kexec@lists.infradead.org; Thu, 12 Nov 2026 16:43:13 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 72EF561D3E; Thu, 12 Nov 2026 16:43:09 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D5B731F000C4; Thu, 12 Nov 2026 16:43:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794501789; bh=qMPAKcfOiDx77Aw4OnsNyGUu0CKw5fyN/4q2Bj4VySY=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=TaSo0gm1mYVTOTO0UFE67te3sagvpRZaWy9QUQxWkPpogSV0tBpYEYQpFe+4Cf95+ L4586K7G3YxuNkc2tiv3voC9dIfCYPA2nCziKbAXq21rN5KlS0D+hMrvDmfUwAVXSb PaFD5lcNTA54geZkwjUExJHnr5FXfSkbhoKJ206zJlVuHvM6QAOxNJsPSyxGF76mMb rvZijIj3vflDycmHpcR0ZxdNqx9twGEGE6LGF8kKyL/Y6WEMrQTuIPVcux9dn49b7G 1gzcBsSBY/iXB9Fd2X60+YDqCW2RXuvhRQ8Hh4afmdQaTKzOZ4zntwtgbd8MSoAtoz ZYNianvMddO8A== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH RFC 4/4] crash_dump: use copy_oldmem_to_iter() everywhere To: "Christian Brauner" Cc: "Linus Torvalds" , "Breno Leitao" , "Chris Mason" , "Thomas Gleixner" , x86@kernel.org, kexec@lists.infradead.org, "David Hildenbrand" In-Reply-To: <20261112-work-procfs-oldmem-v1-4-ecdcafd99265@kernel.org> References: <20261112-work-procfs-oldmem-v1-0-ecdcafd99265@kernel.org> <20261112-work-procfs-oldmem-v1-4-ecdcafd99265@kernel.org> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Thu, 12 Nov 2026 16:43:08 +0000 X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: sashiko-reviews@lists.linux.dev Sender: "kexec" X-Spam-Status: No, score=-10.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 X-Archived-By: > Make the remaining copy_oldmem_page() implementations copy the page of > the crashed kernel with copy_oldmem_to_iter() like x86_64 and powerpc > do. None of these architectures has a machine check safe copy today, so > for them this is copy_to_iter() under another name. But the copy of a > page of the old kernel is in one place now, and an architecture that > gains ARCH_HAS_COPY_MC later gets the recovery without touching its > crash dump code. >=20 > s390 stays as it is. It copies the old kernel's memory through its real > address mode window in memcpy_real_iter(), and an uncorrected storage > error is fatal on s390 anyway (cf. s390_handle_damage()). >=20 > No functional changes. >=20 > Signed-off-by: Christian Brauner (Amutable) Sashiko has reviewed this patch and found no issues. --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20261112-work-procf= s-oldmem-v1-0-ecdcafd99265@kernel.org?part=3D4