+ mm-page_owner-fixing-wrong-information-in-dump_page_owner.patch added to mm-hotfixes-unstable branch

+ mm-page_owner-fixing-wrong-information-in-dump_page_owner.patch added to mm-hotfixes-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm: page_owner: fix wrong information in dump_page_owner
has been added to the -mm mm-hotfixes-unstable branch.  Its filename is
     mm-page_owner-fixing-wrong-information-in-dump_page_owner.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-page_owner-fixing-wrong-information-in-dump_page_owner.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: Maninder Singh <maninder1.s@samsung.com>
Subject: mm: page_owner: fix wrong information in dump_page_owner
Date: Wed, 24 Apr 2024 16:48:37 +0530

With commit ea4b5b33bf8a ("mm,page_owner: update metadata for tail
pages"), new API __update_page_owner_handle was introduced and arguemnt
was passed in wrong order from __set_page_owner and thus page_owner is
giving wrong data.

[   15.982420] page last allocated via order 0, migratetype Unmovable, gfp_mask 0xcc0(GFP_KERNEL), pid 80, tgid -1210279584 (insmod), ts 80, free_ts 0

Fixing the same.
Correct output:
[   14.556482] page last allocated via order 0, migratetype Unmovable, gfp_mask 0xcc0(GFP_KERNEL), pid 80, tgid 80 (insmod), ts 14552004992, free_ts 0

Link: https://lkml.kernel.org/r/20240424111838.3782931-1-hariom1.p@samsung.com
Fixes: ea4b5b33bf8a ("mm,page_owner: update metadata for tail pages")
Signed-off-by: Maninder Singh <maninder1.s@samsung.com>
Signed-off-by: Hariom Panthi <hariom1.p@samsung.com>
Acked-by: Oscar Salvador <osalvador@suse.de>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Lorenzo Stoakes <lstoakes@gmail.com>
Cc: Rohit Thapliyal <r.thapliyal@samsung.com>
Cc: Uladzislau Rezki (Sony) <urezki@gmail.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
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~mm-page_owner-fixing-wrong-information-in-dump_page_owner
+++ a/mm/page_owner.c
@@ -328,7 +328,7 @@ noinline void __set_page_owner(struct pa
 	if (unlikely(!page_ext))
 		return;
 	__update_page_owner_handle(page_ext, handle, order, gfp_mask, -1,
-				   current->pid, current->tgid, ts_nsec,
+				   ts_nsec, current->pid, current->tgid,
 				   current->comm);
 	page_ext_put(page_ext);
 	inc_stack_record_count(handle, gfp_mask, 1 << order);
_

Patches currently in -mm which might be from maninder1.s@samsung.com are

mm-page_owner-fixing-wrong-information-in-dump_page_owner.patch