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 204F0606A321 for ; Fri, 23 Oct 2026 08:18:21 +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=3lsvFae4; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=mjDriSXi 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=xu2HskALF4vHugz1HfPOf04xInHsKZY4eA7638JxyWE=; b=3lsvFae41ICSG6q1dbp44NUtf7 /jH1IEVU0nufyska5V2mbOBv7Z9K2FpiXXaIrKD4LmZZ1TYE7+Yp7CfOzTsVhoKfiBXLxSr60ObpD J9xbkPABQ8PVFwRbKdSOJqR01as5POeTrJY0kwUns8Rr1C0P8XNQgjpvLGY8GDnPB4CysoqveAFyh 4J6zVR79T3SuzJCgs0LNzRkE59VaOYbZJgoo547uxQOQBnOEDin7vXQcEUibyXLW+TJbXOqWHnM8/ mO41TbtoIbVc1MUq1ZtOzEyqmyvrgjfVyIoceEsjfet+PaK6v/XTeQ2Ug7Y9VHEH+8HbQsroFFV3N muIDUfUg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xKATk-0000000Fuhm-2MDh; Fri, 23 Oct 2026 08:18:20 +0000 Received: from tor.source.kernel.org ([2600:3c04:e001:324:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.100.1 #2 (Red Hat Linux)) id 1xKATg-0000000Fugr-48Rg for kexec@lists.infradead.org; Fri, 23 Oct 2026 08:18:18 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 128C0602BA; Fri, 23 Oct 2026 08:18:16 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 30E6D1F031E4; Fri, 23 Oct 2026 08:18:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792743495; bh=xu2HskALF4vHugz1HfPOf04xInHsKZY4eA7638JxyWE=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=mjDriSXi2Ds5941zxQFJXvUqJ+ePyX0z176L1xTQ7asFUkF+FUMj3kB8AVeJkjb2v GhTys05eJzC6yvJgXRltnFC3JijWoMOREFdX3B1qLBLLGjdPFlGyn/4lMpYDKhx8hD rgyUMm/uPrsJNay8HJPbbbj95rWcRU9KtuTb9mfPZTaekGmVUbnY360csfjS627zzT 8K/j//CTYBzk5DEkjrGASdOBDdvp+oG3lsa4JN32N+1D/OkU1l4LNKNchEmP9ADVRI fKqeAYeqyryG9HNp+011H6e95/r7jfjE1gUbeAaslZUQUvl2VnLqKECgreUGs5JbvS dN3zNPBZSSCxQ== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH 3/5] kexec_file: Honor the segment alignment for CMA allocations To: "Han Gao" , "Paul Walmsley" , "Palmer Dabbelt" , "Albert Ou" , "Alexandre Ghiti" , "Nathan Chancellor" , "Nick Desaulniers" , "Bill Wendling" , "Justin Stitt" , "Andrew Morton" , "Baoquan He" , "Mike Rapoport" , "Pasha Tatashin" , "Pratyush Yadav" , "Yao Zi" Cc: "Han Gao" , kexec@lists.infradead.org In-Reply-To: <20261023-riscv-kexec-cma-fixes-v1-3-825b90ea23c4@iscas.ac.cn> References: <20261023-riscv-kexec-cma-fixes-v1-0-825b90ea23c4@iscas.ac.cn> <20261023-riscv-kexec-cma-fixes-v1-3-825b90ea23c4@iscas.ac.cn> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Fri, 23 Oct 2026 08:18:14 +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=-11.2 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: > From: Han Gao >=20 > dma_alloc_from_contiguous() limits the requested alignment to > CONFIG_CMA_ALIGNMENT without reporting it. kexec_alloc_contig() can > therefore place a segment at a less aligned address than buf_align. On > RISC-V with 4 KiB pages, the default 1 MiB limit is below the 2 MiB > kernel alignment, and the new kernel stops at the setup_vm() BUG_ON for > a misaligned physical address. >=20 > Release such a block and fall back to the regular memory hole search, > which honors the alignment. >=20 > Fixes: 07d24902977e ("kexec: enable CMA based contiguous allocation") > Signed-off-by: Han Gao Sashiko has reviewed this patch and found no issues. --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20261023-riscv-kexe= c-cma-fixes-v1-0-825b90ea23c4@iscas.ac.cn?part=3D3