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 9853F606A31A for ; Thu, 29 Oct 2026 17:47:22 +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=itharZfy; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=AXksKZnF 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; 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Thu, 29 Oct 2026 17:47:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793296037; bh=dbHLf79sDGkaeTIITFJP1T5z8gpLt867RRVSSnVOQ4c=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=AXksKZnFF3c2iQduO00lbZjPrZkwROo96KxxejuFw42ObmoRva517ml7gB6t5Sgyb wJ5rFESDTNgyQszFUJqt+4BTxE6FqXfYlmftEiUtIlVhUEznyDLhYAzepumRQXm8sZ UBYr3hRSK9vZYXlHsZhSY4qDAERXx1BwRaaKQK8RigVyrEtfq7UxswHVMJahmtJSSO n9stvfu8QAZG2Cwl0FmwXyeSRdUoOTXBAA+pHTato+g16uA8VanG7Lr2kSmEf0Qian W6He6BTB2meEy3LNTXvhjPjHmO0FYDBsI3yaVJOiuElZtbZa7acpZgiQj+mgteBFH5 hR2YnjyQBLh/g== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH v6 5/8] LoongArch: Allow memblock arrays to resize To: "George Guo" , rppt@kernel.org, pasha.tatashin@soleen.com, pratyush@kernel.org, chenhuacai@kernel.org, ardb@kernel.org, shuah@kernel.org Cc: ilias.apalodimas@linaro.org, akpm@linux-foundation.org, baoquan.he@linux.dev, ruirui.yang@linux.dev, guodongtai@kylinos.cn, kernel@xen0n.name, graf@amazon.com, liukexin@kylinos.cn, kexec@lists.infradead.org In-Reply-To: <20261029172956.20791-6-dongtai.guo@linux.dev> References: <20261029172956.20791-1-dongtai.guo@linux.dev> <20261029172956.20791-6-dongtai.guo@linux.dev> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Thu, 29 Oct 2026 17:47:16 +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: > From: George Guo >=20 > LoongArch never calls memblock_allow_resize(), so the reserved region > array cannot grow beyond INIT_MEMBLOCK_RESERVED_REGIONS entries > (INIT_MEMBLOCK_REGIONS + NR_CPUS). >=20 > After kexec, kho_memory_init() reserves every range preserved by KHO. > Each range that is not adjacent to another one needs its own entry, so > with enough scattered preserved pages the array overflows and the > incoming kernel panics: >=20 > Kernel panic - not syncing: memblock: cannot resize reserved array > Call Trace: > memblock_double_array+0x2d4/0x2f8 > memblock_isolate_range+0x54/0x1a8 > [ ... ] > preserved data. >=20 > Co-developed-by: Kexin Liu > Signed-off-by: Kexin Liu > Signed-off-by: George Guo Sashiko has reviewed this patch and found no issues. --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20261029172956.2079= 1-1-dongtai.guo@linux.dev?part=3D5