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 74FFDC982F1 for ; Tue, 22 Sep 2026 08:44:08 +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=BQZ6M9cJvbnCelbC8h/SiM2wDn1buqTcsR+O1dmHqTM=; b=hlD+SLhT6HmKbwedkJXrSjMOKO 7kJjwXEXz07lX7/GN/GKIUK7nIuyZewSn4xlaxfmkBHk8yc4750r6105yB/Zav9UCK77wbmA0vrd7 65VQNNqdTJqQyS9HVMe1YL77jIKvrjSRXCfup8JYDnaaiSyg2M8NeJDCI5a7T+iZAUmINLC3in3Sf LfS93SsQVYZZ84y5pinm92BTBlxiaawqEceEgcuF11kss6ckx7iCxi8Kp2Jk9rFX+AUg6Hmxsrvq2 ErsEbXVq95j18jsZbYPp6iItV5s/u85qF3XoWBttafWsF4VmOMZBPz6H+jYAgAIKn/iHXwjpq8YG1 WOH0Va3A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x8w6h-00000004ivo-2ws2; Tue, 22 Sep 2026 08:44:07 +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 1x8w6f-00000004itb-44cK for kexec@bombadil.infradead.org; Tue, 22 Sep 2026 08:44:06 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Transfer-Encoding:MIME-Version :References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=BQZ6M9cJvbnCelbC8h/SiM2wDn1buqTcsR+O1dmHqTM=; b=Id3DDOHUoUQkdaK+o7w5aqpPEA UujTWPy28WCDDdQvGssGwWlhsvUOs0aG15w5NzkLYzVgez6FL/iPBRLQlotbKZvy7dHKHmVCfix/1 E01lQw/ypvYefRXBcwDEOdwLHNvv0BhSdkp48PjgZeo7F+bnumfzy4oBOwffgIoGg3lVAH8wlgkDh 85a/qOFtnIh6HSgpMypfjIfDMD7+YwTMNq1IpC9Q5IVVdq855a3yoL9Dw21e1q+6Ho+sF2PD/QBIn wSVC6krjLIYVNsEAPAEW/xiUVV9Ufj8/tvjThFOEYq8eGBMrldTxx9OhY7ZNp1cCeUN66k4mTqj3o sO84ZFBQ==; Received: from mail-pj2-x01.google.com ([2607:f8b0:4864:39::1]) by desiato.infradead.org with esmtps (Exim 4.99.2 #2 (Red Hat Linux)) id 1x8w6a-0000000DHaA-3toC for kexec@lists.infradead.org; Tue, 22 Sep 2026 08:44:04 +0000 Received: by mail-pj2-x01.google.com with SMTP id 98e67ed59e1d1-39e249c766bso1632789a91.0 for ; Tue, 22 Sep 2026 01:44:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1790066639; x=1790671439; 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=BQZ6M9cJvbnCelbC8h/SiM2wDn1buqTcsR+O1dmHqTM=; b=Fd/mG62JbKtk4HmHAb8GXJWWTXHaIVkuhIXWZYTSlUmEvysommzkCKFBepm2D3L4gy queTNf/QexmZyhrcLQdiKJkiDyxS0i9Z/cPYU2LIbeO0ZMQUdJYVeYsDQ/mmlM8+e/Uf AYvzWVzilLzZXK6DxiWyjzJy5sIRl4EXyoFEVdNz5Hk8HQXo8uPQWLPv3/T4N5gVkB6P oZqnwxvvzfRVWeJXvq0onEyiYM5229CVHPXWdpUqSk7RmgNlp8PNrRd+DkWvcYtgWV+F nRAf9OsaEbDSNsZt3wgcqxKH/AKOdw9y1gprMwhyrS7I8mvxcsX0sDCQDXJXNu0cqKdY 2Daw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1790066639; x=1790671439; 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=BQZ6M9cJvbnCelbC8h/SiM2wDn1buqTcsR+O1dmHqTM=; b=g+1Mq4lYKkpWDD28lNGG8NwevLA8T07Tc7v1SnqaQMoCojz3cfpxFQciWKKiY2Zpdc pFNEImiDyWdY0GmJgvfq7pG21bA34PJKY/PJs5H7ZSK3AgQYLA9qi7nCYCvD0BSeg6on AIghzCffe+89y10ZWbUzadw3ST63UaZsYCn4287XLFZvocuWXAWgIAxi8RvjaexP4xLb JkjIKGMo/HNHodBz1FXrF/EY+aJVJFIYDcyL9MhEJQL2hdG5BmczXSMS3TgGTu/zYA/p x98OViLm9qTnvfiP2gjN8TWNvBE/Zl536IIsyuPyCV3KRGFoNxbdmpYh+HddSHdIBMdS YTKw== X-Forwarded-Encrypted: i=1; AKwUvBynnwUAMQGWUTl8If61yuPKGgI2X7WbdJm40gSpJBQa4YwA0NYNbLfsonvwCaqDQNYbPVd1tg==@lists.infradead.org X-Gm-Message-State: AFuF++ltlrDD+DSWeoU1+Fi+WI23CHK0pHfrCCbYtEsAJO+ysJVh39AC +DTEMCPDZrChWQF4BBKz7l7yQX3VrDwEyKzxcrr5C8NmHzHhFliPXUAZ X-Gm-Gg: AYBFou1sdNHxfRvD1nea/+3QdmSgrS61Xtihta1RyWCNVgTT3lpcVvUCefNvLnNcTcX 6JBlmqi8xF45Ni/Sby4br8zzjCTKtk4pxKieetw2m7YzVX8Gis3iXsiT5z71lpLfLy4NmByLref fzDpWw/DBHni2V6rBtd/GTnLLAszkUW1xymNN+eojb9tY/2mT7BzIGAyxaWjDyaxtEVcFr4Hzkl hzmcTHPTzj2CR/P8dOspoIX+CAAvAZmCdNzIUrLjseEhdxTmslPGiq4YZZtwEvrx1IDmVQf/s3t UM/Pnf6Traiikk8GuVZ8FilikjqmP8ntrmcfmMnqN0iF3BsQybSHl46TxMpgPPBtRiTAB0P57g0 HZRi0M2wNdyQteXmC7fFA85btRFPOxK59KVV7CiWu8p93sPIwY+/1SABbL7KbS9lk4OexsqANVb 6IpikXJJxp+NakGofkdQQiPaK/MUz3g15drDC/Pax7QyO/PCdOyb564cF3l9EZXQDwg+YWL464f qKt5dZ678w= X-Received: by 2002:a17:90b:35c5:b0:39e:6a80:dd9b with SMTP id 98e67ed59e1d1-3a0731f9793mr476673a91.34.1790066638632; Tue, 22 Sep 2026 01:43:58 -0700 (PDT) Received: from intel.company.local ([122.11.210.25]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3a0674a5ae4sm3670016a91.12.2026.09.22.01.43.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 22 Sep 2026 01:43:58 -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: [PATCH v7 4/9] crash_core: replace for_each_mem_range() with for_each_mem_region() Date: Tue, 22 Sep 2026 16:42:51 +0800 Message-ID: <20260922084256.1515554-5-chenwandun1@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260922084256.1515554-1-chenwandun1@gmail.com> References: <20260922084256.1515554-1-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-20260922_094401_300367_818E7D68 X-CRM114-Status: GOOD ( 12.45 ) 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 From: Wandun Chen for_each_mem_range() skips MEMBLOCK_NOMAP regions implicitly. Switch the weak defaults to for_each_mem_region(), which exposes struct memblock_region and per-region flags, and filter NOMAP regions explicitly via the new crash_should_skip_region() helper. This prepares for a subsequent patch to extend the skip filter. No functional change. Signed-off-by: Wandun Chen Tested-by: Meijing Zhao Acked-by: Baoquan He --- kernel/crash_core.c | 25 +++++++++++++++++-------- 1 file changed, 17 insertions(+), 8 deletions(-) diff --git a/kernel/crash_core.c b/kernel/crash_core.c index d0cc2496dc09..c7acb2e449df 100644 --- a/kernel/crash_core.c +++ b/kernel/crash_core.c @@ -270,6 +270,12 @@ int crash_prepare_elf64_headers(struct crash_mem *mem, int need_kernel_map, return 0; } +/* Exclude NOMAP regions from the vmcore. */ +static bool crash_should_skip_region(struct memblock_region *reg) +{ + return memblock_is_nomap(reg); +} + static struct crash_mem *alloc_cmem(unsigned int nr_ranges) { struct crash_mem *cmem; @@ -285,22 +291,25 @@ static struct crash_mem *alloc_cmem(unsigned int nr_ranges) unsigned int __weak arch_get_system_nr_ranges(void) { unsigned int nr_ranges = 2 + crashk_cma_cnt; /* crashk_res + crashk_low_res, +CMA splits */ - phys_addr_t start, end; - u64 i; + struct memblock_region *reg; - for_each_mem_range(i, &start, &end) + for_each_mem_region(reg) { + if (crash_should_skip_region(reg)) + continue; nr_ranges++; + } return nr_ranges; } int __weak arch_crash_populate_cmem(struct crash_mem *cmem) { - phys_addr_t start, end; - u64 i; + struct memblock_region *reg; - for_each_mem_range(i, &start, &end) { - cmem->ranges[cmem->nr_ranges].start = start; - cmem->ranges[cmem->nr_ranges].end = end - 1; + for_each_mem_region(reg) { + if (crash_should_skip_region(reg)) + continue; + cmem->ranges[cmem->nr_ranges].start = reg->base; + cmem->ranges[cmem->nr_ranges].end = reg->base + reg->size - 1; cmem->nr_ranges++; } return 0; -- 2.43.0