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 9A6D8606A328 for ; Wed, 4 Nov 2026 16:29:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=H3BESp4x; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=CD7Wjnz+ 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=btAFHWraiLZXnwN3m19IqyuO1ZQBC+GObDhlu50KPEc=; b=H3BESp4xmzA1Y9Cb13MUPNxVOt IoC8gdCn+EeZzif7X74xU0UkvYqciVfH/VgXA33/nJxlqisbHDqqfYB9DaIlktLkE2ljNqd/LB8Xy CIWHt5c1UdL3YDbxoLRTC7xSgslTwNjl+pG44Y+3PVO+6EuD7yb0eZkYRxH0HdLhZLx5DR4Afhjsg myLXxmTGWVownFGvq6hb4/auzVKdfYnyjuzgUj7gErkEshUXEDaY5/upsxJDnLeXKKnc9hFt56z3O CaVbd1Rq2tLQgVKEWqAlw4EkXlfKMFAiEY/ODO0+N7u5HcfotpXHBHXOvqs0Bh3ADwu0tTcqgaHmN DMjeeAJA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xOdrv-00000005z2G-3yWc; Wed, 04 Nov 2026 16:29:47 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.100.1 #2 (Red Hat Linux)) id 1xOdru-00000005z1O-1gq4 for kexec@lists.infradead.org; Wed, 04 Nov 2026 16:29:46 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id D0CB64131C; Wed, 4 Nov 2026 16:29:45 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E5A8C1F000C1; Wed, 4 Nov 2026 16:29:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793809785; bh=btAFHWraiLZXnwN3m19IqyuO1ZQBC+GObDhlu50KPEc=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=CD7Wjnz+JtwGrAA9NRB47TrFMJtyZNjUqSt4adUg7EE4nySAea609sO1i8h42sIju LSCXEtQZhMYtalYJowJIGZ+GOYEpAfTnCBKLTgBknjsSQQYtzXZ3yZf7D8Pk6MEmEy c3DMulzAL6GGC9W2VeqI5jwSG+yIukhIL7CiL1mbG9ISjitJNrZj5S52uVGhE2dr97 c3qdE5VinRhKdEoom4lw6Jpr4LLK5VfVTGQh36IkIMNAkPQ9evebHSOXwDpRD+feSi 3oeDoh5exOopwyDonQwMRyAuYzMMnk35iu71/msnVr7qadHU+jjvzRt/eEfk9qZYQf Be4Q8HQSxMTLw== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH 1/4] kexec: do not place the next kernel in a fixed-address CMA area To: "Radhey Shyam Pandey" , robh@kernel.org, saravanak@kernel.org, akpm@linux-foundation.org, david@kernel.org, ljs@kernel.org, liam@infradead.org, vbabka@kernel.org, rppt@kernel.org, surenb@google.com, mhocko@suse.com, m.szyprowski@samsung.com, robin.murphy@arm.com, baoquan.he@linux.dev, pasha.tatashin@soleen.com, pratyush@kernel.org Cc: kexec@lists.infradead.org In-Reply-To: <20261103162429.2053989-2-radhey.shyam.pandey@amd.com> References: <20261103162429.2053989-1-radhey.shyam.pandey@amd.com> <20261103162429.2053989-2-radhey.shyam.pandey@amd.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Wed, 04 Nov 2026 16:29:44 +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: > kexec_alloc_contig() takes the next kernel's destination from the default > CMA area and the next kernel runs from there in place, which is safe only > if that area does not exist at the same address in the kernel being loade= d. > For a device-tree area it does: the loaded kernel declares the range it is > executing from as a shared-dma-pool and cma_activate_area() frees its own > image to the page allocator. Record in CMA_DYNAMIC_BASE which areas CMA > placed itself and accept only those, letting kexec_locate_mem_hole() fall > back to the memblock search. "cma=3Dnn" works, "cma=3Dnn@ss" no longer do= es. >=20 > Fixes: 07d24902977e ("kexec: enable CMA based contiguous allocation") > Suggested-by: Mike Rapoport > Signed-off-by: Radhey Shyam Pandey Sashiko has reviewed this patch and found no issues. --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20261103162429.2053= 989-1-radhey.shyam.pandey@amd.com?part=3D1