From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 2690A60A263B for ; Wed, 21 Oct 2026 08:32:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20251104 header.b=Pm9Mh7ou Received: by kanga.kvack.org (Postfix) id 4542F6B0674; Wed, 21 Oct 2026 04:32:23 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 405246B0676; Wed, 21 Oct 2026 04:32:23 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 2CD1D6B0677; Wed, 21 Oct 2026 04:32:23 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id 00FAE6B0674 for ; Wed, 21 Oct 2026 04:32:22 -0400 (EDT) Received: from smtpin09.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay01.hostedemail.com (Postfix) with ESMTP id 06FB71C3C20 for ; Wed, 21 Oct 2026 08:32:22 +0000 (UTC) X-FDA: 85345966524.09.18707D1 Received: from mail-pz2-f5.google.com (mail-pz2-f5.google.com [74.125.228.5]) by imf06.hostedemail.com (Postfix) with ESMTP id 35E43180004 for ; Wed, 21 Oct 2026 08:32:20 +0000 (UTC) Authentication-Results: imf06.hostedemail.com; dkim=pass header.d=gmail.com header.s=20251104 header.b=Pm9Mh7ou; spf=pass (imf06.hostedemail.com: domain of chenwandun1@gmail.com designates 74.125.228.5 as permitted sender) smtp.mailfrom=chenwandun1@gmail.com; dmarc=pass (policy=none) header.from=gmail.com ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1792571540; b=RmU4rTR6P+lLvuc/mSNAxx8FPhRFMLkZKWYORWAGvmJI+eExvQC/furPYa+DDffkKD9lFj 8ZhgsVMyfECQo7feDIgkaKU8n/JvDECxLi7i52pkB6tNnzkCDBZ/CgnoN9lHebiR38/QZr 5u2JEDs+dUvmEKFpiWYhn/faqwyIczA= ARC-Authentication-Results: i=1; imf06.hostedemail.com; dkim=pass header.d=gmail.com header.s=20251104 header.b=Pm9Mh7ou; spf=pass (imf06.hostedemail.com: domain of chenwandun1@gmail.com designates 74.125.228.5 as permitted sender) smtp.mailfrom=chenwandun1@gmail.com; dmarc=pass (policy=none) header.from=gmail.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1792571540; 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-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=gUG85+B7KqrDZpPXGb0QyiCfKe+tueHmqLD38rgeJ0Q=; b=dWtInsS0kBLlN/UgoxHL8fMdMCoK8MrXx1WofehGFbX77gkN3ivAbeLZ1zVoszrxV/awdK PUsJZtANF+OrpL8boHJ65Hl1AdXEZSZBGeC644Oa5pgUUbhDVZ8lc32MRx7MRiRkuhE+eq P8hWSTeJf9SCUfvlb6Kd736y6RhRpsc= Received: by mail-pz2-f5.google.com with SMTP id 41be03b00d2f7-cc7c286026aso155132a12.0 for ; Wed, 21 Oct 2026 01:32:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1792571539; x=1793176339; darn=kvack.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=gUG85+B7KqrDZpPXGb0QyiCfKe+tueHmqLD38rgeJ0Q=; b=Pm9Mh7oueUJ0g9YqDqBMl4kS2KKic9PpQBhlzh08ZjsJ3yKjb+x9NkMCsFaVDo8nXp nqykaqyay+MLFiuUQsuV22ZgKnfV1vd+9OMqC+RxqDLrmhoyC8aK4715+NPC7ws4/y3M v/4hkDDczJ9aSkb8XGbcVkUh56UvW/r9ycxdQ1GwU/R9M42WHPKFncRYGfXTIiLcFFsc aRF94Yh9nzfRVd9nd+sDNQt6Qojzdp/+21RXtrl0abPPLzqBPN0y+8qk2NfaE0myrV1o dr28JW7Xdp+PD7K0jqwKkbPUssCC0AED9r5wo0K7cC8T0e1g3pxp23rSZIgSRfeNSYpy JmAA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1792571539; x=1793176339; 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=gUG85+B7KqrDZpPXGb0QyiCfKe+tueHmqLD38rgeJ0Q=; b=h+2MU+9sjOj0yLblTrpIQF3AUs4mPAawbkbcAvI+LN5ed1nOImNBjpP62SQnbe6sNj W+pOf/X3nAU7St33FKp7/OaN6j1UhEMSx8UAsiwN5gXWIi+z1PUsvtwS6xyNW1b5G4RO jnpwLCG9Qt6DujbCuI7h60NTJL2MHeWbLxcOAf6jqgyFfhxurTv69wbQXZureBY1Yj0Q sDypkJBL8BeDaJTXFvF7I5R7e5vEfhxudSRLuPkxInFoLA20T4gCc36A9mg9RNRRVJKv MZIDzz2QmKonLvZWu3b9SSpuThiliTUQzawRuVFMiFotkzHNHEbiq7F9ZvHx+kAL0oyx sQXw== X-Forwarded-Encrypted: i=1; AKwUvBzxnrfobfTpmnGk+jmfNmkGd9+EbjqVbi5VFf8gEL0j4ZN37H+MmWwe7mHPskGkR/070zdLOUswGg==@kvack.org X-Gm-Message-State: AFq9FYKwNVM7riDHSEzCyndCBSbR5MRyaFik+vV/3RoQXuOZtv7W/5f8 Qe8ohXVmJUs16Z1Vkg3hdLUitI0f4gdSwvUXOfMNezh7Fks6T1jJv50I X-Gm-Gg: AYBFou2ZhwR4e3tMLNUE9mFFWJWMcQ9a8q7qEF7hr/BBtg+rbNmWrsFGICj1TwDrVGk w+Laszn7wg7fVFrrY3HNXcKzrTXiyA1PMbq+HdsFvPEltVMkjEqSW9Gb7rfYAVMn1PBGD9I611s XSdPJwv53UBzr8JFFc4GbQVUdnIAvxaEwl9mJvH0kD+bLQfknTiQcf4Lg0TSvMV7dTyBff1RvYb UZ8MJ1ywcxn9E3Ha1hrvRa8Qwe91Rnd5sy2X1BA8DQMAV907U/HeyYMGnt4TJAZpH+6NALob0K4 idtB6qtHGeahLZSRbjeYt4nX8LLMeQdd58zsTvIy646rt4REBpq99v2oxSGtrBtcxiuQnQY0tdY GaxLFJ3PP25R6B7z5V5cSbbx23t55qIakIcet4/8shH8GS9GVvINnCQwlW4f5qqNeKwnXNY8lxd j8xB/j4KM1eECKosYQbZXtfujjD2rJjSWSXfcuaY3eUDV9XQ6GHh1A7sSRAvVU8RQRlLovR7Ung LkTrkQV0hZrNg9ZWISajiJpfVKpAkKTSGH8byybPrrVGTYP07ohMcNFeIU3LE7caUjr X-Received: by 2002:a05:6a00:a0e:b0:8a0:1435:fda0 with SMTP id d2e1a72fcca58-8a089d4702cmr1201474b3a.51.1792571538862; Wed, 21 Oct 2026 01:32:18 -0700 (PDT) Received: from intel.company.local ([122.11.210.25]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-8a0895e273bsm600653b3a.41.2026.10.21.01.31.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Oct 2026 01:32:09 -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 v9 7/8] of: reserved_mem: mark /reserved-memory entries with MEMBLOCK_NODUMP Date: Wed, 21 Oct 2026 16:30:10 +0800 Message-ID: <20261021083011.2170525-8-chenwandun1@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20261021083011.2170525-1-chenwandun1@gmail.com> References: <20261021083011.2170525-1-chenwandun1@gmail.com> X-Archived-By: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: ciihf8cwnd9s9qpp8535bfwsto4z5rp3 X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_PASS,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 35E43180004 X-Rspam-User: X-HE-Tag: 1792571540-294476 X-HE-Meta: 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 75zkTstd 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 From: Wandun Chen Mark non-dumpable reserved-memory regions with MEMBLOCK_NODUMP so kdump can omit them from the vmcore. The marking is guarded by CONFIG_CRASH_DUMP and either CONFIG_KEXEC_FILE or CONFIG_CRASH_HOTPLUG, so kernels that do not build or update crash ELF headers do not pay the cost of splitting memblock.memory entries at NODUMP boundaries. Signed-off-by: Wandun Chen Tested-by: Meijing Zhao Acked-by: Marek Szyprowski Reviewed-by: Rob Herring (Arm) --- drivers/of/fdt.c | 1 + drivers/of/of_private.h | 1 + drivers/of/of_reserved_mem.c | 18 ++++++++++++++++++ 3 files changed, 20 insertions(+) diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c index ecc923102622..a5f223a74b7e 100644 --- a/drivers/of/fdt.c +++ b/drivers/of/fdt.c @@ -1285,6 +1285,7 @@ void __init unflatten_device_tree(void) /* Save the statically-placed regions in the reserved_mem array */ fdt_scan_reserved_mem_late(); + fdt_mark_reserve_mem_nodump(); /* Populate an empty root node when bootloader doesn't provide one */ if (!fdt) { diff --git a/drivers/of/of_private.h b/drivers/of/of_private.h index 0ae16da066e2..505735732c13 100644 --- a/drivers/of/of_private.h +++ b/drivers/of/of_private.h @@ -187,6 +187,7 @@ static inline struct device_node *__of_get_dma_parent(const struct device_node * int fdt_scan_reserved_mem(void); void __init fdt_scan_reserved_mem_late(void); +void __init fdt_mark_reserve_mem_nodump(void); bool of_fdt_device_is_available(const void *blob, unsigned long node); diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c index 8c9d6395d6a3..db2bf76000d2 100644 --- a/drivers/of/of_reserved_mem.c +++ b/drivers/of/of_reserved_mem.c @@ -677,6 +677,24 @@ static void __init fdt_init_reserved_mem_node(unsigned long node, const char *un reserved_mem_count++; } +void __init fdt_mark_reserve_mem_nodump(void) +{ + struct reserved_mem *rmem; + int i; + + if (!IS_ENABLED(CONFIG_CRASH_DUMP)) + return; + + if (!IS_ENABLED(CONFIG_KEXEC_FILE) && !IS_ENABLED(CONFIG_CRASH_HOTPLUG)) + return; + + for (i = 0; i < reserved_mem_count; i++) { + rmem = &reserved_mem[i]; + if (rmem->size && !rmem->dumpable) + memblock_mark_nodump(rmem->base, rmem->size); + } +} + struct rmem_assigned_device { struct device *dev; struct reserved_mem *rmem; -- 2.43.0