From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 2FBD0C61DD6 for ; Wed, 2 Sep 2026 07:35:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=Nb5Q2Se78rLq0fXFEmBN2MgTVK3UgvxyIXmhlVfKh+w=; b=p0JS+pW4mw2+ntiLaNiz/Zol7e OAQnO53uWaZk+bqsrtxnMuJXXBxMe1tPHqxFDnUWguWfOrkU0BHhxaPjIGO1hROLlXbtf6lz4fCcG Ca9eJm6/ivwKeuPYip71G3PMX0V4x9Ij2gjvX2T98lDlBscKtRWmjN/Img0BhiQiobe7PG1dxx/xQ 4kKHc/ckUg/PhB4c9sD/dBzR7OXu/8ZSoGYo4wcM1jxuIp/BuNzj7SBiuUsMinuWgkFXoEbwlvs4W kiNPpiz5Q0fydFNfAT5k/A6QUBaBYMjJogGydJdQYQgxE5nF3YyWxEPHiS2dbokxX5SnZ1oh45ZGL yZE3mMAg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x1fUr-0000000DxPj-016Q; Wed, 02 Sep 2026 07:35:01 +0000 Received: from mail-pz2-x0b.google.com ([2607:f8b0:4864:3b::b]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x1fTc-0000000Dx6o-0UhQ for linux-arm-kernel@lists.infradead.org; Wed, 02 Sep 2026 07:33:55 +0000 Received: by mail-pz2-x0b.google.com with SMTP id 41be03b00d2f7-cc1cb94b583so255266a12.0 for ; Wed, 02 Sep 2026 00:33:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1788334423; x=1788939223; darn=lists.infradead.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=Nb5Q2Se78rLq0fXFEmBN2MgTVK3UgvxyIXmhlVfKh+w=; b=F7MXSFNQC7lN7mWAImdv78D2wRBdtBQwMR2uldOxjj6ia1+HqbiETEtq3JdDyTM/v0 lcuQNxWzjgmkWEpF/lG0MURaQyN91w4pl71OrunzIgV1OSOzSDzkITmriOsW+STQ+wsf A0vGwgg5W2Pc4ovLiKX0EnTmQjQk1UzwL1i7m1+BKAothuVKfyfwBta61VA2GBdMhlWe 44HGpakdWFGan5XKvXWoAD9cMOhHWiCw6s2G8Lo+iy89bSp879oePLdt3cEk/gExs0C/ DUiwcuk5sIdjLNJzMtBYj2IuyKhrXx8cB4cmrdMAjsfsWRka6pKYOZpLphOD0+pbS3zh MB+w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1788334423; x=1788939223; 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=Nb5Q2Se78rLq0fXFEmBN2MgTVK3UgvxyIXmhlVfKh+w=; b=ZzVc31vy0QJLrPfnoh94/j8zqAmwhm56gLJ7RCK3iZQG9Tkxc/ayS+2xvG33TfspBx dUDPzN+Je1wADxvJTP2vzxutTqZ5I+PTXtfPD4rFs0ppntgTR6cX4d4HZ5r463yONlb6 3qUcosncBTzXWi4WjmVRznArBCXCfWRGbyz1axXM/1skOwMdq5l+t9/8yMAVE2L2F3GX tb1w7PAcwLRDoFweYI264A2g/EN3wvqdXV1mIVwDSJ1oUYkIsGFHYeBOuRgKXGnBhzng s1uch8jN6RaTTAGNIF50QeHyjXj9Q5yH3hPSssSbQjX6Xo1c3LgHpV8SbpYJI/otM5xL ngjA== X-Forwarded-Encrypted: i=1; AKwUvByYi/v3diAf41HcjeJ5zWWNSinpUN1doYB8MqwRai+9POxlzx/6xcMFMwfdIC06fb7fT66m6RGwjtYD+Tja15Qb@lists.infradead.org X-Gm-Message-State: AFuF++l61y97BPWC1z5k1joE+X2fdzaheUOr0PuWVR1UmADRqpqJPRfr jb63TQ7MpIQtM20zSj9ckX3SvRCIE6lnytkBpBU1ATCOnfA84iQcSQN8 X-Gm-Gg: AYBFou0E5E8x5mXzoVmiFvKUwdte4n+Ac8Twppw6WoT+zoaZpAT4Ve0MD+HLa3jMh8n VOGB2dku1BYDDIIeZNCed4MLuH9nBQ+FKHCjUHykaxalupanbI9YcDq4RMB/wY+XcvwpXCKIx0d XDKpKfgLWIkOIfLF8F5hUY31zlwZH4tq3i72gOjt3pCtvliKp9aNN0C5M1hEoAR9PSvkXXwdXYv +uLLJpmhIQa+rhT/B7FeeYeWVrtHtTM5USycdGREOwspKsSbL+DnlXvbNg+Tu+Ye6qELiKatARb D8Ek0XySI4mhchKZffWS2yoFXctY5JgCwXvkWn+Xvw6OeeZBE5oMjiWVxfWm32D6PqQQ/uZ3lA2 iVRhWRiYcZtAv3PtWqItd7qDngePC7cjgZcaMj/QueLqxYTb3q9HH8BhWQSnAedxZxMMBhyWo2t KelGdtL9vhlw0LCtVBI+x/zLAn98EMgvQRFbkmPu82Mcjq7QXAvW1ythvlUxMIjs/hIJHfSOOO X-Received: by 2002:a05:6a00:6ca9:b0:84f:77cc:63cd with SMTP id d2e1a72fcca58-85ed4449927mr5116039b3a.17.1788334423379; Wed, 02 Sep 2026 00:33:43 -0700 (PDT) Received: from intel.company.local ([122.11.210.25]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-85db2adcbedsm926914b3a.20.2026.09.02.00.33.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Sep 2026 00:33:41 -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, tglx@kernel.org, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, robh@kernel.org, saravanak@kernel.org, akpm@linux-foundation.org, baoquan.he@linux.dev, rppt@kernel.org, pasha.tatashin@soleen.com, pratyush@kernel.org, m.szyprowski@samsung.com Cc: mark.rutland@arm.com, kernel@xen0n.name, alex@ghiti.fr, hpa@zytor.com, 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 v6 10/10] crash_core: skip MEMBLOCK_NODUMP regions when building vmcore ELF header Date: Wed, 2 Sep 2026 15:31:16 +0800 Message-ID: <20260902073116.802752-11-chenwandun1@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260902073116.802752-1-chenwandun1@gmail.com> References: <20260902073116.802752-1-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-20260902_003344_685403_7C40312C X-CRM114-Status: GOOD ( 11.62 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=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 --- 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 bd64cf585795..b0e618e13588 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