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Tue, 22 Sep 2026 01:45:08 -0700 (PDT) Received: from intel.company.local ([122.11.210.25]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3a0674a5ae4sm3670016a91.12.2026.09.22.01.44.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 22 Sep 2026 01:45:07 -0700 (PDT) From: Wandun Chen To: robh@kernel.org, baoquan.he@linux.dev, rppt@kernel.org, m.szyprowski@samsung.com Cc: catalin.marinas@arm.com, will@kernel.org, mark.rutland@arm.com, chenhuacai@kernel.org, kernel@xen0n.name, pjw@kernel.org, palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr, tglx@kernel.org, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, saravanak@kernel.org, akpm@linux-foundation.org, pasha.tatashin@soleen.com, pratyush@kernel.org, ruirui.yang@linux.dev, robin.murphy@arm.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, kexec@lists.infradead.org, linux-mm@kvack.org, iommu@lists.linux.dev Subject: [PATCH v7 9/9] crash_core: skip MEMBLOCK_NODUMP regions when building vmcore ELF header Date: Tue, 22 Sep 2026 16:42:56 +0800 Message-ID: <20260922084256.1515554-10-chenwandun1@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260922084256.1515554-1-chenwandun1@gmail.com> References: <20260922084256.1515554-1-chenwandun1@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260922_014511_280504_DCAE45F4 X-CRM114-Status: GOOD ( 10.11 ) X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org From: Wandun Chen Reserve regions (for GPU, DSP, ...) carry no data useful for crash analysis. Exclude MEMBLOCK_NODUMP regions from the vmcore ELF header to reduce vmcore size and capture time. crash_should_skip_region() now also returns true for MEMBLOCK_NODUMP. Signed-off-by: Wandun Chen Tested-by: Meijing Zhao Acked-by: Baoquan He --- kernel/crash_core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/crash_core.c b/kernel/crash_core.c index c7acb2e449df..fdfeee5afa1a 100644 --- a/kernel/crash_core.c +++ b/kernel/crash_core.c @@ -270,10 +270,10 @@ int crash_prepare_elf64_headers(struct crash_mem *mem, int need_kernel_map, return 0; } -/* Exclude NOMAP regions from the vmcore. */ +/* Exclude NOMAP and NODUMP regions from the vmcore. */ static bool crash_should_skip_region(struct memblock_region *reg) { - return memblock_is_nomap(reg); + return memblock_is_nomap(reg) || memblock_is_nodump(reg); } static struct crash_mem *alloc_cmem(unsigned int nr_ranges) -- 2.43.0