[to-be-updated] mm-fix-accounting-of-memmap-pages-for-early-sections.patch removed from -mm tree

[to-be-updated] mm-fix-accounting-of-memmap-pages-for-early-sections.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm: fix accounting of memmap pages for early sections
has been removed from the -mm tree.  Its filename was
     mm-fix-accounting-of-memmap-pages-for-early-sections.patch

This patch was dropped because an updated version will be issued

------------------------------------------------------
From: Sumanth Korikkar <sumanthk@linux.ibm.com>
Subject: mm: fix accounting of memmap pages for early sections
Date: Mon, 4 Aug 2025 10:40:15 +0200

memmap pages can be allocated either from the memblock (boot) allocator
during early boot or from the buddy allocator.

When these memmap pages are removed via arch_remove_memory(), the
deallocation path depends on their source:

* For pages from the buddy allocator, depopulate_section_memmap() is
  called, which also decrements the count of nr_memmap_pages.

* For pages from the boot allocator, free_map_bootmem() is called. But
  it currently does not adjust the nr_memmap_boot_pages.

To fix this inconsistency, update free_map_bootmem() to also decrement the
nr_memmap_boot_pages count by invoking memmap_boot_pages_add(), mirroring
how free_vmemmap_page() handles this for boot-allocated pages.

This ensures correct tracking of memmap pages regardless of allocation
source.

Link: https://lkml.kernel.org/r/20250804084015.270570-1-sumanthk@linux.ibm.com
Fixes: 15995a352474 ("mm: report per-page metadata information")
Signed-off-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Pasha Tatashin <pasha.tatashin@soleen.com>
Cc: Sourav Panda <souravpanda@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/sparse.c |    1 +
 1 file changed, 1 insertion(+)

--- a/mm/sparse.c~mm-fix-accounting-of-memmap-pages-for-early-sections
+++ a/mm/sparse.c
@@ -688,6 +688,7 @@ static void free_map_bootmem(struct page
 	unsigned long start = (unsigned long)memmap;
 	unsigned long end = (unsigned long)(memmap + PAGES_PER_SECTION);
 
+	memmap_boot_pages_add(-1L * (DIV_ROUND_UP(end - start, PAGE_SIZE)));
 	vmemmap_free(start, end, NULL);
 }
 
_

Patches currently in -mm which might be from sumanthk@linux.ibm.com are

mm-fix-accounting-of-memmap-pages.patch