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

Eugen Hristev
2025-11-19T15:45:56Z

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@linaro.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