+ mmpage_owner-dont-remove-__gfp_nolockdep-in-add_stack_record_to_list.patch added to mm-hotfixes-unstable branch

+ mmpage_owner-dont-remove-__gfp_nolockdep-in-add_stack_record_to_list.patch added to mm-hotfixes-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm,page_owner: don't remove __GFP_NOLOCKDEP in add_stack_record_to_list
has been added to the -mm mm-hotfixes-unstable branch.  Its filename is
     mmpage_owner-dont-remove-__gfp_nolockdep-in-add_stack_record_to_list.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mmpage_owner-dont-remove-__gfp_nolockdep-in-add_stack_record_to_list.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: Christoph Hellwig <hch@lst.de>
Subject: mm,page_owner: don't remove __GFP_NOLOCKDEP in add_stack_record_to_list
Date: Mon, 29 Apr 2024 10:28:28 +0200

Otherwise we'll generate false lockdep positives.

Link: https://lkml.kernel.org/r/20240429082828.1615986-1-hch@lst.de
Fixes: 217b2119b9e2 ("mm,page_owner: implement the tracking of the stacks count")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Oscar Salvador <osalvador@suse.de>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Darrick J. Wong <djwong@kernel.org>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Marco Elver <elver@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/page_owner.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/page_owner.c~mmpage_owner-dont-remove-__gfp_nolockdep-in-add_stack_record_to_list
+++ a/mm/page_owner.c
@@ -170,7 +170,7 @@ static void add_stack_record_to_list(str
 
 	/* Filter gfp_mask the same way stackdepot does, for consistency */
 	gfp_mask &= ~GFP_ZONEMASK;
-	gfp_mask &= (GFP_ATOMIC | GFP_KERNEL);
+	gfp_mask &= (GFP_ATOMIC | GFP_KERNEL | __GFP_NOLOCKDEP);
 	gfp_mask |= __GFP_NOWARN;
 
 	set_current_in_page_owner();
_

Patches currently in -mm which might be from hch@lst.de are

mmpage_owner-dont-remove-__gfp_nolockdep-in-add_stack_record_to_list.patch