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 4FF14C88E75 for ; Fri, 18 Sep 2026 08:10:03 +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:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=ajXDT72SASPlUAIpfN0KU7YI2VHhEl8UztFZ5ElJ3Lc=; b=jDovYCj+dkQPaGhz9uhMDLrLWo 6CSBgADGa32BJr+wd6Rva0XQTyl/G89GZJEkBmugZ7XWq/ev0BBYzPmN2TTKYRHqR9FWciYtlBAql x347QTd3oMmaLg1V9dsHhYXSzUz/hR2EEG9Udz9jpe16H5c6w7DR6xHVsFaN1LwG3G0q6Snnvc3BY OgETG5CMg+vi+yLOY6sh1u3JpzQwHMFPopD2jlSut5P7cLwm8cHA8rvjiO8pHWZ3VBMjfNz0MVD18 m2F5ifT0jBIOatBuRbFfcRK5vtwz8KX47hZfakN4tmT1XkP68ToVI8kYa3J2/47qIxTqmlCRnAirE wqbOsQ1A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x7TfV-0000000Dlb1-3IBU; Fri, 18 Sep 2026 08:10:01 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x7TfU-0000000DlaD-3M4p for kexec@bombadil.infradead.org; Fri, 18 Sep 2026 08:10:00 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=ajXDT72SASPlUAIpfN0KU7YI2VHhEl8UztFZ5ElJ3Lc=; b=M+JtUB+14RBMVOT6EBfOv8yYhG pQFok2afWbOZ9sEKJ4+QzgbJnuGQHbhitXlTOYMYxU5mF0p/yIaGxiYODtlWqa71Z+WbRmd44nE9Z 40958XWl2gjOSoU9orSIkSrLvzxn2lq8SedGKAW23yzeBvUhrZ+1M9c51D2eJiTsF4IhmuUnmmoLS 9gKY69KCuHregHVV2OYUcxd88Up6bir3mGXl0wOC7mXzt3INvWtYv2RY5CDzH3FSWVgzAOxf1vjOJ KDEBUQTAXnWuMomzWjotPSN8Xuo4qTOvd0Mv87mhyFtzYywz62Tj+ScBUxPTju2kzksL/8jMOT/KU kDO381ww==; Received: from out-89.mta0.migadu.com ([2001:41d0:1004:224b::59] helo=mta0.migadu.com) by desiato.infradead.org with esmtps (Exim 4.99.2 #2 (Red Hat Linux)) id 1x7TfQ-00000009lZ2-12Rv for kexec@lists.infradead.org; Fri, 18 Sep 2026 08:09:59 +0000 X-Envelope-To: kexec@lists.infradead.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: kexec@lists.infradead.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-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260918_090956_379941_7D777E58 X-CRM114-Status: GOOD ( 12.49 ) 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 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 >