The quilt patch titled
Subject: mm/page_alloc: clear PageBuddy using __ClearPageBuddy() for bad pages
has been removed from the -mm tree. Its filename was
mm-page_alloc-clear-pagebuddy-using-__clearpagebuddy-for-bad-pages.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: David Hildenbrand <david@xxxxxxxxxx>
Subject: mm/page_alloc: clear PageBuddy using __ClearPageBuddy() for bad pages
Date: Wed, 29 May 2024 13:19:02 +0200
Let's stop using page_mapcount_reset() and clear PageBuddy using
__ClearPageBuddy() instead.
Link: https://lkml.kernel.org/r/20240529111904.2069608-5-david@xxxxxxxxxx
Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
Tested-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx> [zram/zsmalloc workloads]
Cc: Hyeonggon Yoo <42.hyeyoo@xxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Mike Rapoport (IBM) <rppt@xxxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/mm/page_alloc.c~mm-page_alloc-clear-pagebuddy-using-__clearpagebuddy-for-bad-pages
+++ a/mm/page_alloc.c
@@ -498,7 +498,8 @@ static void bad_page(struct page *page,
dump_stack();
out:
/* Leave bad fields for debug, except PageBuddy could make trouble */
- page_mapcount_reset(page); /* remove PageBuddy */
+ if (PageBuddy(page))
+ __ClearPageBuddy(page);
add_taint(TAINT_BAD_PAGE, LOCKDEP_NOW_UNRELIABLE);
}
@@ -1351,7 +1352,8 @@ static void check_new_page_bad(struct pa
{
if (unlikely(page->flags & __PG_HWPOISON)) {
/* Don't complain about hwpoisoned pages */
- page_mapcount_reset(page); /* remove PageBuddy */
+ if (PageBuddy(page))
+ __ClearPageBuddy(page);
return;
}
_
Patches currently in -mm which might be from david@xxxxxxxxxx are
