linux-kernel - [PATCH 20/26] mm/sparse: Register information into meminspect

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Message-ID: <20251119154427.1033475-21-eugen.hristev@linaro.org>
Date: Wed, 19 Nov 2025 17:44:21 +0200
From: Eugen Hristev <eugen.hristev@...aro.org>
To: linux-arm-msm@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-mm@...ck.org,
	tglx@...utronix.de,
	andersson@...nel.org,
	pmladek@...e.com,
	rdunlap@...radead.org,
	corbet@....net,
	david@...hat.com,
	mhocko@...e.com
Cc: tudor.ambarus@...aro.org,
	mukesh.ojha@....qualcomm.com,
	linux-arm-kernel@...ts.infradead.org,
	linux-hardening@...r.kernel.org,
	jonechou@...gle.com,
	rostedt@...dmis.org,
	linux-doc@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-remoteproc@...r.kernel.org,
	linux-arch@...r.kernel.org,
	tony.luck@...el.com,
	kees@...nel.org,
	Eugen Hristev <eugen.hristev@...aro.org>
Subject: [PATCH 20/26] mm/sparse: Register information into meminspect

Annotate vital static information into meminspect:
 - mem_section

Information on these variables is stored into inspection table.

Register dynamic information into meminspect:
 - section
 - mem_section_usage

This information is being allocated for each node, so call
memblock_mark_inspect to mark the block accordingly.

Signed-off-by: Eugen Hristev <eugen.hristev@...aro.org>
---
 mm/sparse.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/mm/sparse.c b/mm/sparse.c
index 17c50a6415c2..80530e39c8b2 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -15,6 +15,7 @@
 #include <linux/swapops.h>
 #include <linux/bootmem_info.h>
 #include <linux/vmstat.h>
+#include <linux/meminspect.h>
 #include "internal.h"
 #include <asm/dma.h>
 
@@ -30,6 +31,7 @@ struct mem_section mem_section[NR_SECTION_ROOTS][SECTIONS_PER_ROOT]
 	____cacheline_internodealigned_in_smp;
 #endif
 EXPORT_SYMBOL(mem_section);
+MEMINSPECT_SIMPLE_ENTRY(mem_section);
 
 #ifdef NODE_NOT_IN_PAGE_FLAGS
 /*
@@ -253,6 +255,7 @@ static void __init memblocks_present(void)
 		size = sizeof(struct mem_section *) * NR_SECTION_ROOTS;
 		align = 1 << (INTERNODE_CACHE_SHIFT);
 		mem_section = memblock_alloc_or_panic(size, align);
+		memblock_mark_inspect(virt_to_phys(mem_section), size);
 	}
 #endif
 
@@ -343,6 +346,7 @@ sparse_early_usemaps_alloc_pgdat_section(struct pglist_data *pgdat,
 		limit = MEMBLOCK_ALLOC_ACCESSIBLE;
 		goto again;
 	}
+	memblock_mark_inspect(virt_to_phys(usage), size);
 	return usage;
 }
 
-- 
2.43.0