From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj2-f0.google.com (mail-pj2-f0.google.com [74.125.227.128]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D13B14483A0 for ; Thu, 6 Aug 2026 09:37:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.227.128 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786009034; cv=none; b=vALl1KL3Lg5mlxwiINpQNp3yHcJ0DeZJFgVaZlg4j8C00nELo+wbBWK4fGyBHqgoEp9J7QQTcQ698RsM0irrs+PLcIeQDhYQyg89xwDZWQ1Ml6DMti31LihZWzq5/HDLynczQFO8fC7sKm8TSbewx3Eq4XRNhdaeUc37h0kaIE8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786009034; c=relaxed/simple; bh=reK7rFNBw0BdYQ91tXN/M3BLzkC5IvWkzOQ7lbAAVK8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=eAV/XjxxlY5N4oJWtr290Le3NugeOpHJRHHrA1PW9NkOnDqkfaWv3ZRW0jNdrdhVke6TDM0sVuzSJYejUZli5P0rfSLLOhRuevaic7RXb5B0iBkWi+bAdCDKfbDa9mM779IEXQp1be0HvimFB1IzmbcroKUVFX5fonVhqWm8my0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=AM53nFnv; arc=none smtp.client-ip=74.125.227.128 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="AM53nFnv" Received: by mail-pj2-f0.google.com with SMTP id d9443c01a7336-2cc6bb7476dso2630925ad.0 for ; Thu, 06 Aug 2026 02:37:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1786009029; x=1786613829; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to:content-type; bh=6uyTtFjVVo4Ow+xxdf9JzDuHeX18HS+OnizMa+EN8GU=; b=AM53nFnvbT7fhsU7KsWEXcp83bfGNSi+zHrxuxkw55a25BbyP/Pcf4XJRYI+8UroB5 jzxp9nWImIr38rGLtLypIS66+FC3dNr0dbjn42jo+VCp2vId97TlVsb6sJkW5IiEVgAC K9bq3PhRtiEhYe1M/htIJivPAWbM+XVQxNtrTd1GgGFi+h+bJlgxsr3x6Wt6XPnhgBlg vAiHKCPJASoknavU9c32LZfSSuQy4AmocNYfDZCl7nNILIKnxTw3HOmAMczJFXav5YpZ sG2CtVVTDeTjQMsdubeN7tXjawsq6TVkIe/2tKsrNIoj+da/AVNBAlqjVADRPA8YAFKx Setg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1786009029; x=1786613829; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to:content-type; bh=6uyTtFjVVo4Ow+xxdf9JzDuHeX18HS+OnizMa+EN8GU=; b=GR1aaqR0ofV3a1Ne+nXcPrpc9gbSKK/iwXNPBC/PuPP/7e6W5ndTBy1ME+JAVVf62Z e5N7Z6sHEP80xP/MpjWEJmt+cM80kxXz/5OJIePP0o/ZK19B35BRXA7mI2l6allPHNBc e9eWjxxmUWdLZ+Zeveltc8OTvP7Q7mg+A9o98lkL4n9ibXX2UdJcty/LtnsUPqCfV8JA fCMdW0vsOJPjZPF0jL3qRfmrCSb0rXozZvhNe8lui6ndjwbu7Xct1SruoYuD+O8WlE8W zY6zejM81nIvZLlRdHZWpYUUrWaq2u67BlkqakieaEmfuzml7Yd4QkJhfs76zb1h2XuM dmRg== X-Forwarded-Encrypted: i=1; AHgh+Ron+33QJNxqNzvihu6d9KE6wB8H49WGBLcdnsIIMVW8MQPDMMB+23igDsTB03WPO/WRy+wbTafnhmVJI9A=@vger.kernel.org X-Gm-Message-State: AOJu0YzTUTDB3IE7qVWL3w9gZEVxe8joGDxuTPAM0wXdVSZfe3PsWloy SIGlswHAPT6RxEovRjUHfiJB2UObLS8TNXgqcaoNuSZagXiGQ6Fyn0MQ X-Gm-Gg: AR+sD13hWwVSJTU7I3U1JvOczCQJpV7MEhc7S+qb6rEJtNdAWJbFOXXrlOw9xLkKGWp ilYep5HiEdft6KsjDjeB1xpSHsGJIolhgUxgQbeBH46KWsurlng+WDFTxidoUlrgyckOCzYhIhm Kap7esSF2qn/w8g5/ivLk5vL+Wu1TK8N6+KXtH35v2SwoGQCX0UPYMf5sQtlH1cakSYsI6m5ZtV VhpnTTYpgypauACjbWZoT969b8WCBnjHhtt8xX8S5Koe64oqMc2v+wPGbsv6PP6R0FKfNbvfWoA aMP94t35meGoLnNXKjf6eM1DoUB26nv24nIldzAuPndvqs+bwbtjenAY3WcmYIbP8U6X6ktaH6v 33V9p21hRDbEqWDKCnQsZEPjS6/QIojYDF5zee5YY9vOfitLXBQQPriiVeRbA5PJo0chI4hg5dI KM6ulj8pDJD6i0j+/NU3Ya465BSn4jluR9Jh0/XRsNn3LrNlJdS2Nflkc3B3LHwL/grm0gRCtOo w== X-Received: by 2002:a05:6a00:464f:b0:846:5d1f:56d4 with SMTP id d2e1a72fcca58-84f47dd0b44mr3119262b3a.14.1786009028817; Thu, 06 Aug 2026 02:37:08 -0700 (PDT) Received: from intel.company.local ([210.184.73.204]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-84f453b0aeasm1043878b3a.13.2026.08.06.02.36.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Aug 2026 02:37:08 -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 8/8] crash_core: skip MEMBLOCK_NODUMP regions when building vmcore ELF header Date: Thu, 6 Aug 2026 17:35:19 +0800 Message-ID: <20260806093519.2907771-9-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> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 --- 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 fb78b7814f18..8cc9d666bc54 100644 --- a/kernel/crash_core.c +++ b/kernel/crash_core.c @@ -269,10 +269,10 @@ 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