[merged mm-stable] mm-page_owner-record-single-timestamp-value-for-high-order-allocations.patch removed from -mm tree

[merged mm-stable] mm-page_owner-record-single-timestamp-value-for-high-order-allocations.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm/page_owner: record single timestamp value for high order allocations
has been removed from the -mm tree.  Its filename was
     mm-page_owner-record-single-timestamp-value-for-high-order-allocations.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: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Subject: mm/page_owner: record single timestamp value for high order allocations
Date: Sun, 22 Jan 2023 01:50:54 +0900

When allocating a high-order page, separate allocation timestamp is
recorded for each sub-page resulting in different timestamp values between
them.

This behavior is not consistent with the behavior when recording free
timestamp and caused confusion when analyzing memory dumps.  Record single
timestamp for the entire allocation, aligning with the behavior for free
timestamps.

Link: https://lkml.kernel.org/r/20230121165054.520507-1-42.hyeyoo@gmail.com
Signed-off-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---


--- a/mm/page_owner.c~mm-page_owner-record-single-timestamp-value-for-high-order-allocations
+++ a/mm/page_owner.c
@@ -163,6 +163,7 @@ static inline void __set_page_owner_hand
 {
 	struct page_owner *page_owner;
 	int i;
+	u64 ts_nsec = local_clock();
 
 	for (i = 0; i < (1 << order); i++) {
 		page_owner = get_page_owner(page_ext);
@@ -172,7 +173,7 @@ static inline void __set_page_owner_hand
 		page_owner->last_migrate_reason = -1;
 		page_owner->pid = current->pid;
 		page_owner->tgid = current->tgid;
-		page_owner->ts_nsec = local_clock();
+		page_owner->ts_nsec = ts_nsec;
 		strscpy(page_owner->comm, current->comm,
 			sizeof(page_owner->comm));
 		__set_bit(PAGE_EXT_OWNER, &page_ext->flags);
_

Patches currently in -mm which might be from 42.hyeyoo@gmail.com are

lib-kconfigdebug-do-not-enable-debug_preempt-by-default.patch