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b=hxbySvb0c5U1ddRxETp6cq1wU7L0alG6fj7LX9jUThAcqHAP6DklVfNDAiFMmhBTp oYhLfiJSG/U1KguJ1+fjQ1sKb2nDYsIbQWrj7F0SFh+zcmju3XcpqGm9ACxlqzVh81 imPv3oNQC+NcUOKqwhnoyuXoxws25H6N/Md7YGEKNNT5LgJWkHODd1WsT3oLu5XcFK 5BJ3edJlelICi0L81sA+IiZ+qG4Zr46Bwm3HWnhXxKOWwiW0fzHTC89ewFeVFtwAuE lzP9GtwlYiSi3CIp1y8XdnhYJU+nefUAKpLOTJYcK6OoeFYkVsdj+EM9GswkdWZXVU m2+XfPvh4HSrQ== From: "David Hildenbrand (Arm)" Date: Mon, 28 Sep 2026 10:48:21 +0200 Subject: [PATCH] vmcoreinfo: export SECTION_HAS_MEM_MAP MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260928-section_has_mem_map-v1-1-4129f6ba2838@kernel.org> X-B4-Tracking: v=1; b=H4sIANQpumoC/yWM0QqDMAwAf0XybCEWFLtfESldjZpBVRo3BuK/G 7fHg7s7QCgzCTyKAzJ9WHhdFKqygDiHZSLDgzJYtA062xqhuKvj5yA+UfIpbKaxWA/RYUA3gpZ bppG/v2vX/1nez5eW9wrO8wLuHPfkdwAAAA== X-Change-ID: 20260928-section_has_mem_map-6205dc90a09f To: Andrew Morton , Baoquan He , David Carlier , Dave Young Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, "David Hildenbrand (Arm)" X-Mailer: b4 0.16.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1383; i=david@kernel.org; h=from:subject:message-id; bh=4+YaRd+w8CkKUy2umZb5rtfcp72agIYLGB21NcbX/fw=; b=owGbwMvMwCF2/OVpCdfQ3ZWMp9WSGLJ2aV7fJiTZsbSSO9P1lYho1/1HHhtNdlb6H3vYUZP+J +f3l3T+jlIWBjEOBlkxRZag4PsGL1+uq61242OGmcPKBDKEgYtTACayQJqR4QXXg8p2FVmmD+xf /1VOKCn4YyydI6+dI+7/+OBywXu3JzIyXHwUXzzpx8kM0yyjE3OuRL6x11iz8KDcx813VNtro9Z xsQIA X-Developer-Key: i=david@kernel.org; a=openpgp; fpr=1BD9CAAD735C4C3A460DFCCA4DDE10F700FF835A X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 252CE120005 X-Stat-Signature: x91acjccuiq4uitmfixb8c7oqpmhq68g X-Rspam-User: X-HE-Tag: 1790585307-652912 X-HE-Meta: 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 tD86h3bG ejTWu09MZuKyxC0V1MfvS3OfAbQhWqQyT3JnE/Q1FWP1K6OnTNFQO29F9ogx1qwpUI559O8p4K2HKs2XIbqUP3uojSn6afuWYwoPadZPTgJhci5YrELxfhltGgTD6YTKi3vOqvKcy1rN64Rh3aD/ErxwX/Duhr1rKId+RO8Juuo4OTkgLG4MIQnSDfuL32xwtLt8IuVkTySgAYzKbB7CrRVVUW0n47vOxNV+1QKjIeCTM3dqF/oTBYnJgUyIHlrtDssf8PRziVpXTxklXzefBffRxXZOhJI9Pod77 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: The crash tool currently hardcodes SECTION_HAS_MEM_MAP, and makedumpfile needs similar information (although still relying on SECTION_MARKED_PRESENT, it should switch to SECTION_HAS_MEM_MAP). Let's just export the value instead, so tools that work on vmcoreinfo will not have to guess. Signed-off-by: David Hildenbrand (Arm) --- Result of the discussion in reply to "[PATCH v2 00/13] mm/sparse: remove SECTION_MARKED_PRESENT and further cleanups" [1] This patch can go in independently. It would be preferable if both go into the same kernel release ;) [1] https://lore.kernel.org/r/20260921-b4-sparsemem_cleanups-v2-0-54d81d65e125@kernel.org --- kernel/vmcore_info.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/vmcore_info.c b/kernel/vmcore_info.c index 5a417f8a922a..7833a36064a8 100644 --- a/kernel/vmcore_info.c +++ b/kernel/vmcore_info.c @@ -182,6 +182,7 @@ static int __init crash_save_vmcoreinfo_init(void) VMCOREINFO_STRUCT_SIZE(mem_section); VMCOREINFO_OFFSET(mem_section, section_mem_map); VMCOREINFO_NUMBER(SECTION_SIZE_BITS); + VMCOREINFO_NUMBER(SECTION_HAS_MEM_MAP); VMCOREINFO_NUMBER(MAX_PHYSMEM_BITS); #endif VMCOREINFO_STRUCT_SIZE(page); --- base-commit: 57e4ac91fc62d75d84b5a03827a19ceb4094ecd9 change-id: 20260928-section_has_mem_map-6205dc90a09f -- Cheers, David