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Thu, 06 Aug 2026 02:36:11 -0700 (PDT) From: Wandun Chen To: catalin.marinas@arm.com, will@kernel.org, chenhuacai@kernel.org, pjw@kernel.org, palmer@dabbelt.com, aou@eecs.berkeley.edu, robh@kernel.org, saravanak@kernel.org, rppt@kernel.org, baoquan.he@linux.dev, pasha.tatashin@soleen.com, pratyush@kernel.org, m.szyprowski@samsung.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, linux-mm@kvack.org, kexec@lists.infradead.org, iommu@lists.linux.dev Cc: kernel@xen0n.name, alex@ghiti.fr, akpm@linux-foundation.org, ruirui.yang@linux.dev, robin.murphy@arm.com Subject: [PATCH v5 3/8] of: reserved_mem: mark /reserved-memory entries with MEMBLOCK_NODUMP Date: Thu, 6 Aug 2026 17:35:14 +0800 Message-ID: <20260806093519.2907771-4-chenwandun1@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260806093519.2907771-1-chenwandun1@gmail.com> References: <20260806093519.2907771-1-chenwandun1@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: A9179A0015 X-Stat-Signature: u3md4cecs7bt5nocb37mypui8z95sfie X-Rspam-User: X-HE-Tag: 1786008973-582086 X-HE-Meta: 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 teaOp+66 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Wandun Chen Mark non-dumpable reserved-memory regions with MEMBLOCK_NODUMP so kdump can omit them from the vmcore. The marking is guarded by CONFIG_CRASH_DUMP so non-kdump kernels do not pay the cost of splitting memblock.memory entries at NODUMP boundaries. Signed-off-by: Wandun Chen Tested-by: Meijing Zhao --- drivers/of/of_reserved_mem.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c index 7b1616b9c6c2..f38d11df6f15 100644 --- a/drivers/of/of_reserved_mem.c +++ b/drivers/of/of_reserved_mem.c @@ -674,6 +674,9 @@ static void __init fdt_init_reserved_mem_node(unsigned long node, const char *un rmem->name ? rmem->name : "unknown"); } + if (IS_ENABLED(CONFIG_CRASH_DUMP) && !rmem->dumpable) + memblock_mark_nodump(rmem->base, rmem->size); + reserved_mem_count++; } -- 2.43.0