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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0A6FDC88E75 for ; Fri, 18 Sep 2026 08:09:59 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 2AC306B0092; Fri, 18 Sep 2026 04:09:58 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 2833D6B0095; Fri, 18 Sep 2026 04:09:58 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 198DF6B0096; Fri, 18 Sep 2026 04:09:58 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id EE45F6B0092 for ; Fri, 18 Sep 2026 04:09:57 -0400 (EDT) Received: from smtpin30.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay03.hostedemail.com (Postfix) with ESMTP id 842BDA05EB for ; Fri, 18 Sep 2026 08:09:57 +0000 (UTC) X-FDA: 85226159634.30.F6579A5 Received: from mta0.migadu.com (out-150.mta0.migadu.com [91.218.175.150]) by imf30.hostedemail.com (Postfix) with ESMTP id 918CC80008 for ; Fri, 18 Sep 2026 08:09:55 +0000 (UTC) Authentication-Results: imf30.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=ADFQDA+8; spf=pass (imf30.hostedemail.com: domain of baoquan.he@linux.dev designates 91.218.175.150 as permitted sender) smtp.mailfrom=baoquan.he@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1789718995; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=ajXDT72SASPlUAIpfN0KU7YI2VHhEl8UztFZ5ElJ3Lc=; b=ur8XrQbae7hZmlmaxU7UgZiwFIgVC4XGBRlW57ncA8YCd7IGJPAh24ce7apgIjf98pBNqJ XDrt8UnVgExS0HPIcnutlKid4v/GH2baHDyWFGj+o0sH5eTiKHDCqQcL6tZjkYuexe97rT uNdeDMAb0GZSRcMlPcJZNM4XwXqdcp4= ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1789718995; b=OQqazCGHJ6R4FvCrDeZaW23I9w5U9b7r1qzPTt/5pM6biKP/gBE0yLEZM/sbZSGg4+F5Iv owZGwR7K1FJMcFAszMF7FTd/n8IhbL8dJkllw09+FRK/uTBjBbPn/rRQ6AE8I2v+hWYGC4 Fsyk8uUL0Whxj8mkEj7ivKcr8IEXVYI= ARC-Authentication-Results: i=1; imf30.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=ADFQDA+8; spf=pass (imf30.hostedemail.com: domain of baoquan.he@linux.dev designates 91.218.175.150 as permitted sender) smtp.mailfrom=baoquan.he@linux.dev; dmarc=pass (policy=none) header.from=linux.dev X-Envelope-To: linux-mm@kvack.org DKIM-Signature: a=rsa-sha256; bh=nOrA6LUUXVDyAS34aH1r5AVGEJg8nxE5D7IKoW8+wIQ=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1789718994; v=1; x=1790323794; b=ADFQDA+8TsnOkukS5fm8rZm9Oyd+Iw4z2srzzl8WrTbKLBBVgPWXUyKgqFQPgR/K+hDwYhDb B7cGxqBI2yqG31O7adiQ76NoqZ5urKgGQZj3OxckVHflyNIep9ss948jyETzhw6XZeHIrjthTbY RT0ebUOZjFCZglV1SThXrPuE= X-Envelope-To: linux-mm@kvack.org Received: by mta11.migadu.com with ESMTPS id db6dbc05fe83f0e0; Fri, 18 Sep 2026 08:09:53 +0000 X-Mizu-Trace-ID: db6dbc05fe83f0e0 X-Migadu-Flow: FLOW_OUT Date: Fri, 18 Sep 2026 16:09:37 +0800 From: Baoquan He To: Wandun Chen Cc: 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, rppt@kernel.org, pasha.tatashin@soleen.com, pratyush@kernel.org, m.szyprowski@samsung.com, 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: Re: [PATCH v6 10/10] crash_core: skip MEMBLOCK_NODUMP regions when building vmcore ELF header Message-ID: References: <20260902073116.802752-1-chenwandun1@gmail.com> <20260902073116.802752-11-chenwandun1@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260902073116.802752-11-chenwandun1@gmail.com> X-Rspamd-Server: rspam04 X-Rspam-User: X-Stat-Signature: fnzf1487zo5ustfk6f6pyxys1nu791i9 X-Rspamd-Queue-Id: 918CC80008 X-HE-Tag: 1789718995-75341 X-HE-Meta: U2FsdGVkX19fSEe/T8e72RzIgbqCFz/rt9sV2nHhT/sEjmPFf8JbdBuM6YMndelPsXbovqG7xK4Ns/eitzi6eljDs2rnDLKjh8rNLvSs3Ma5g2EpGWG0kcijp5ByguRrQZNoLDiKqeJ7QF1YK0NKKj2Tj0f7QRLuujcsIyKjBgPH6FBTYIoUtAb6VE5/Sp6ZQaRgFTJ5EuoCZm+juFztbJQIP8i/GxsSh4uaKapmhxYM7ciBS5+QLnzVwgiMzHZcNEkTGY3rMjIfM9xH3+/WCWBDRGqbyvcppaUay3zeiKo44QekqXLNB03XRn6I7PwfWHYmvB1KUCO1oNWtb+7aRYcg3Z6th+QJE8FjHQ+GhS34TbFvqGjW/fzBca/sJU10xVcIngZd5NyjVHyN4xOKbwZnWHvUEZGvPQxjJo7xaCuWdBq1xvU9YL3aCdcx7Oxl2tuAHu7vRaWHsLRsQujavgUnLGrbV0Oj1Oh9o2h8WgESiCVhmk6G4JjuIafcscMjfBFJ++3IltzGBJuPaQkND0EsT7wdTW/f2AXOgPep+0aSifTlGakjhnXzN4ac6/Vc6dFDIivtVYIFBXCpMKCIr3WIrf5wjXifbBfoC1keU6Yh02kcHs/fIt+rmFftIxzx2+1ofdbn66DaWW063sVQD2zW0Qp22U/zcQGc70rbdN9/2Uif9OSVpHwp8jSblhx0039j9hUyfuZb34KKiIv4YP1/DuufTT8xwrqAbOT+Kf23BiIPxl1XoGTXsrOxZ4JsfE+cj5cSDBmA7UgL8Q+pKhuDQ4vbDSzd9nSKt9kbz+QtonSOsGu0RV5NHn6ldsDbhfHaOicqhCv5HthHCIXviC3LbeuwzuOd/BLKJvrWVjOAIq8blbzPmRQPli0nXvI9LPSYP92sXaSRftTXDQ4F1WHQJ91DJk1P3ueCykpYwClwmcXBIaHH2nP1VBCctwjF4dZ4SzHQwgOngYsI6M0 9eYHNW7l kzU2nO8p13BrU7wK83LCaVRPyIrHeykaRsnco1liMXMvshXUBSrGSYXhf6J60Drrikixi/+HPGzaHSaKbHdN4ftRu4uvLdr8pX3DpkxZLmu2T83hakJQotLBMZ0RpbS1yQH2rXDZnUlaLkSu15tHM6I2ETWjR+wE2f4hsqrHIRDLvM5sGiCM0RP/uqKTIQ4S7ORiH+0K6EKHY+gOdGD3yp4xXiuCtJY+LR02JO8c3wXNk088kHbyiM5uNJJ/W0zwGSmhrIpaYoH2ogWhUByNisNZh5GjXX+A4XBXuXXz5ZOmRaX0S7CzJkqmquv/rp/tsyNt5oXTuOSRyg05ivxSzwhacQ9nIunwgNo0Qp2Mb/dC7O1bcN4n0VvsF4gKqW4hcB+Z+KucFAYQemJhOP7xw8IaIe4qxywgcTB4p Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 09/02/26 at 03:31pm, Wandun Chen wrote: > 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(-) Acked-by: Baoquan He > > 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 >