The patch titled
Subject: mm: don't account memmap on failure
has been added to the -mm mm-hotfixes-unstable branch. Its filename is
mm-dont-account-memmap-on-failure.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-dont-account-memmap-on-failure.patch
This patch will later appear in the mm-hotfixes-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Pasha Tatashin <pasha.tatashin@xxxxxxxxxx>
Subject: mm: don't account memmap on failure
Date: Wed, 7 Aug 2024 21:19:28 +0000
When in alloc_vmemmap_page_list() memmap is failed to allocate, do not
account, the memory is going to be release at the function exit.
Link: https://lkml.kernel.org/r/20240807211929.3433304-3-pasha.tatashin@xxxxxxxxxx
Fixes: 15995a352474 ("mm: report per-page metadata information")
Signed-off-by: Pasha Tatashin <pasha.tatashin@xxxxxxxxxx>
Cc: Alison Schofield <alison.schofield@xxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Domenico Cerasuolo <cerasuolodomenico@xxxxxxxxx>
Cc: Joel Granados <j.granados@xxxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Li Zhijian <lizhijian@xxxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Mike Rapoport <rppt@xxxxxxxxxx>
Cc: Muchun Song <muchun.song@xxxxxxxxx>
Cc: Nhat Pham <nphamcs@xxxxxxxxx>
Cc: Sourav Panda <souravpanda@xxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Yi Zhang <yi.zhang@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/hugetlb_vmemmap.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
--- a/mm/hugetlb_vmemmap.c~mm-dont-account-memmap-on-failure
+++ a/mm/hugetlb_vmemmap.c
@@ -392,13 +392,10 @@ static int alloc_vmemmap_page_list(unsig
for (i = 0; i < nr_pages; i++) {
page = alloc_pages_node(nid, gfp_mask, 0);
- if (!page) {
- mod_node_page_state(NODE_DATA(nid), NR_MEMMAP, i);
+ if (!page)
goto out;
- }
list_add(&page->lru, list);
}
-
mod_node_page_state(NODE_DATA(nid), NR_MEMMAP, nr_pages);
return 0;
_
Patches currently in -mm which might be from pasha.tatashin@xxxxxxxxxx are
mm-update-the-memmap-stat-before-page-is-freed.patch
mm-dont-account-memmap-on-failure.patch
mm-dont-account-memmap-per-node.patch
memcg-increase-the-valid-index-range-for-memcg-stats-v5.patch
vmstat-kernel-stack-usage-histogram.patch
task_stack-uninline-stack_not_used.patch
