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b=bE+Lz4BpzH5TSV1jWou2OBtlqHsC//L3WyTj9bXi6va6c8nZfLJ4ol68JuU+o3r2M TAu2icEvroIVO5OuYcPgJYCAhNQXTzOAIclO3FED1OglGnXQvoVgXQi9NkcPaNCm7C NxCHhu8wntvOtj4LO509qvBQvss+eZM34/jEYGD2HXc7uGKovRY4ujMtUk30a4EgKF zPD0eqlpLObbbLfAP2BCbHPLwLZz0rgjBIedFlBVM78LXQPEzVbz5SKMMk3kZSKLLI Ww16aNzudepZDNF3jG6O0DxZCUHUXGJHhXcE+1AZc6MCWnHl/xvccdOs6+sET6/9Sd Dca8d8QUwinxQ== Date: Thu, 17 Sep 2026 16:56:53 -0500 From: "Rob Herring (Arm)" To: Wandun Chen Cc: m.szyprowski@samsung.com, hpa@zytor.com, chenhuacai@kernel.org, pasha.tatashin@soleen.com, devicetree@vger.kernel.org, linux-mm@kvack.org, tglx@kernel.org, robin.murphy@arm.com, kernel@xen0n.name, mingo@redhat.com, saravanak@kernel.org, loongarch@lists.linux.dev, dave.hansen@linux.intel.com, will@kernel.org, akpm@linux-foundation.org, rppt@kernel.org, iommu@lists.linux.dev, mark.rutland@arm.com, alex@ghiti.fr, linux-riscv@lists.infradead.org, pjw@kernel.org, linux-kernel@vger.kernel.org, baoquan.he@linux.dev, aou@eecs.berkeley.edu, kexec@lists.infradead.org, pratyush@kernel.org, linux-arm-kernel@lists.infradead.org, ruirui.yang@linux.dev, catalin.marinas@arm.com, bp@alien8.de, palmer@dabbelt.com, x86@kernel.org Subject: Re: [PATCH v6 08/10] of: reserved_mem: mark /reserved-memory entries with MEMBLOCK_NODUMP Message-ID: <178968221332.3991643.14928206071521736133.robh@kernel.org> References: <20260902073116.802752-1-chenwandun1@gmail.com> <20260902073116.802752-9-chenwandun1@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260902073116.802752-9-chenwandun1@gmail.com> X-Stat-Signature: p6xcwqj9tfztqddnepa7ckxefbfea3au X-Rspam-User: X-Rspamd-Queue-Id: 73A612000E X-Rspamd-Server: rspam03 X-HE-Tag: 1789682216-300970 X-HE-Meta: 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 9sM8Oa5N IZ0wNG8mufzqbi1nrhD5e17gYCwMw59Alh1cyVIyoKfLmQYH9/vfv4Z5HLzqEFPGumnAr2ziY3shhfwh8ZiqNJMVAzF62s4Y+RKIEpFmx57/UDfqTl0uv2Tu/VVHYqUKUifgzPat+JJdpN4oiaQnC5X2CWHepxptgFSOuWaxvsNiqA3wo8ATFMT0mQySmrNJbhSBrNGXc14vunuFnps+p/TyD2GyEZ+8TY6i7ZH/sU5PHzDjEe2clEbPMH186js64LvRVO+Nq89mG3TB0sKItmB3Q6K36MOE7ZLF58q/VCbL45CsWVd6VyukqNZdMemsTSI7AIfu7cKNP1E02oaprIvIzB5XTcOajuAJm5oCDIsdgJiXns8+4W0FshSKfq8pfHsCd Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, 02 Sep 2026 15:31:14 +0800, Wandun Chen wrote: > 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/fdt.c | 1 + > drivers/of/of_private.h | 1 + > drivers/of/of_reserved_mem.c | 15 +++++++++++++++ > 3 files changed, 17 insertions(+) > Reviewed-by: Rob Herring (Arm)