From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pz2-f8.google.com (mail-pz2-f8.google.com [74.125.228.8]) (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 F277D3B1022 for ; Fri, 16 Oct 2026 06:17:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.228.8 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792131467; cv=none; b=UsGki/TeAYliPBOE4g1ZmkadPn+qj9blo6fFaO/wfOvQJoCnYOzktGvg87nlwPvc9UbS6zA2KkhCAiyF63lkv/9x54Zsn+91ZZ/oQsI4oJqkffkLA35/AMSDlpprMHA/LCAXDUak7dPMuHrns8YSbANc8I06G+on51NjrolHybA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792131467; c=relaxed/simple; bh=euWXYByltiCr6eLT3Uvt/s/e9D4RAaciKKJ13Szz3HY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ruCQUp4R35qKFRfJxr38l7iu8vwDFDTWBhICYzM5bsGZmEF/oEE/LN8t4rtJejse+A1hxnpnkf9zaS8mRUAkZrxT2Nr1+3dY0Fuia1o1LM7bA08Ir4XToYrTpaD8O3/mwQdNuGw9zJnGCFcsd65NhOzMoywLZ4CPfjrj3Kr93uU= 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=rCus1n00; arc=none smtp.client-ip=74.125.228.8 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="rCus1n00" Received: by mail-pz2-f8.google.com with SMTP id 41be03b00d2f7-ccb794ce92fso507622a12.1 for ; Thu, 15 Oct 2026 23:17:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1792131465; x=1792736265; 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=oKmXp2d3TpfvxuGqVqHnwKm3WEcWPeyk8O3QNAPgerw=; b=rCus1n00JlnitjfimZydf+oRVJfN/AUR5mdxYSbNezwChoMj5dn7hp8TQ14xH2TIMj yVP8dabKAI6sowQhV8LBRLkzdvZrMe/GobgCiwqh/ZBTBdwQb8sSkGbZPb+My03onvlU V3iZbunP2zIquiLJbxSiGnsN5ve2fw9CjyYp8vNA1J1NNCmUhhtKEwV6xX+XE5U5r9RB xr7ZEXU7M++U9+FL/RQX23wA7KeViFtc+ckM2h+3WIVHifCR7+Y3PdUJhfBNLUTsdyFX HVy0HTGqFZ3T8Mx2CMSlNjTSIsQutOZXXG2ixoRjnbFN31sdwsUYNE3f0HqdyTjbwmP8 y1dw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1792131465; x=1792736265; 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=oKmXp2d3TpfvxuGqVqHnwKm3WEcWPeyk8O3QNAPgerw=; b=oldSOirWUm+Mgvszc2qj/GBb5L4v3wb0ANQVWlLuD/Cwme8MgAFA1xYnUtXIWyM9BM XgQQl1gnZaKLNker5E6Ppw+7fwdT6zaRIOcAq4WegR23YayR4d2zNFuYQuXeBN/0Pwli Vsk+OPx8wzjAg12lyhnXmB5Am98JYwdZwflZC5EyjqIPca0KZk7XS2K34km8IFV000S2 4DepjAv7+jUo5MOT91jTVhyMQdUzgxhheRxxF6Ta9sHYi76K7ZbTTRk/EzhF3fxeQ/WN AwjHTu4yHtQ90NxjQd9R8HvzilBFDLcX0Mi4SMvnf5fsbJFraEX2hekomdmK9Dm7iYq6 X5MQ== X-Forwarded-Encrypted: i=1; AKwUvBxkMb+ym1O2zO1klKFuz9IO3YokxdIk4CzuLuXR8WDszU3Q89DSnF6mzd5zqmS0oQCxQmY3iojKXOy4@vger.kernel.org X-Gm-Message-State: AFq9FYI5mL5EyYCsrgNBemlc6IHebLnrXdaKtq7bGyxOT7dtwWMAk7db wubliW/TU8C2JlwHI5hSCpKjj4aokAgjR6o9KIx3P7/fEhgYo0F81/kZ X-Gm-Gg: AYBFou3sb5f/rWH5VttrTk2YAGMW1Rigy4N/9fOBNdJzfgKCn5ZypVX2kSCBZE2F25j QjimibkfIU/H6v/UMANxbkKhF8YAyFnD8ZWUY2Hr26ceKYiIlKxZIuUqO027fFjnUnNyHkkvaoX ZWQrxQEvShuVxwACjzo0qtNGCaBVglz0/5h+5tIskehiLedOiTBk9vm3VIcZ/2YgtDp3tOePJsY mlAb+70SeUCJq1JXAhOS2MsJbY8XapRFDv71kgTOOddRdHd2PqFx8NTpSv45Z1bpoFHcgewk4nf tWPo+0DXWt2s/VeoCcbqU6vd9FYn/f567mWtXJ/lDW6zyQ7ODe8mijsMySMAJ7SkZfvihO4QTVc RoB50DD9YXP2ICfirpBX46D3J1wdFik6E3dTEnNIKMk7R7+01FVDgzOS7rXPX/PQoLElftQ1pFJ FoaZr0aaPxHEVF4srX3mx7WuUtdksFjpdH40bDEiEAu/CbLNiBegCsEppRR4Q+NSXPxzfiWvkoN kblywvnFMq4usBLrKfcnw== X-Received: by 2002:aa7:88c2:0:b0:886:cae0:fb64 with SMTP id d2e1a72fcca58-897c700e74emr16786375b3a.31.1792131465299; Thu, 15 Oct 2026 23:17:45 -0700 (PDT) Received: from intel.company.local ([122.11.210.25]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-89f57b334e6sm586375b3a.42.2026.10.15.23.17.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 15 Oct 2026 23:17:44 -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: [RESEND PATCH v8 8/8] crash_core: skip MEMBLOCK_NODUMP regions when building vmcore ELF header Date: Fri, 16 Oct 2026 14:15:49 +0800 Message-ID: <20261016061549.4181390-9-chenwandun1@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20261016061549.4181390-1-chenwandun1@gmail.com> References: <20261016061549.4181390-1-chenwandun1@gmail.com> Precedence: bulk X-Mailing-List: devicetree@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 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 e161c8b65e00..0e2ddc933b22 100644 --- a/kernel/crash_core.c +++ b/kernel/crash_core.c @@ -283,10 +283,10 @@ static struct crash_mem *alloc_cmem(unsigned int nr_ranges) } #ifdef CONFIG_ARCH_KEEP_MEMBLOCK -/* 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); } unsigned int __weak arch_get_system_nr_ranges(void) -- 2.43.0