+ mm-page_owner-move-free_ts_nsec-output-to-free-section-in-__dump_page_owner.patch added to mm-unstable branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: mm/page_owner: move free_ts_nsec output to free section in __dump_page_owner()
has been added to the -mm mm-unstable branch.  Its filename is
     mm-page_owner-move-free_ts_nsec-output-to-free-section-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-move-free_ts_nsec-output-to-free-section-in-__dump_page_owner.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Ye Liu <ye.liu@linux.dev>
Subject: mm/page_owner: move free_ts_nsec output to free section in __dump_page_owner()
Date: Wed, 1 Jul 2026 09:22:32 +0800

The free_ts_nsec field is a free-event timestamp, but it was printed in
the allocation summary line alongside ts_nsec (allocation time).  Move it
to the free section where it logically belongs, together with free_pid and
free_tgid.  This also makes __dump_page_owner() consistent with
print_page_owner(), which only prints ts_nsec in the allocation summary.

The output now groups all free-related information (pid, tgid, timestamp,
stack trace) in one place.

No functional change except output formatting.

Link: https://lore.kernel.org/20260701012239.315262-7-ye.liu@linux.dev
Signed-off-by: Ye Liu <ye.liu@linux.dev>
Acked-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
Cc: Brendan Jackman <jackmanb@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/page_owner.c |    9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

--- a/mm/page_owner.c~mm-page_owner-move-free_ts_nsec-output-to-free-section-in-__dump_page_owner
+++ a/mm/page_owner.c
@@ -653,10 +653,10 @@ void __dump_page_owner(const struct page
 	else
 		pr_alert("page_owner tracks the page as freed\n");
 
-	pr_alert("page last allocated via order %u, migratetype %s, gfp_mask %#x(%pGg), pid %d, tgid %d (%s), ts %llu, free_ts %llu\n",
+	pr_alert("page last allocated via order %u, migratetype %s, gfp_mask %#x(%pGg), pid %d, tgid %d (%s), ts %llu\n",
 		 page_owner->order, migratetype_names[mt], gfp_mask, &gfp_mask,
 		 page_owner->pid, page_owner->tgid, page_owner->comm,
-		 page_owner->ts_nsec, page_owner->free_ts_nsec);
+		 page_owner->ts_nsec);
 
 	handle = READ_ONCE(page_owner->handle);
 	if (!handle)
@@ -668,8 +668,9 @@ void __dump_page_owner(const struct page
 	if (!handle) {
 		pr_alert("page_owner free stack trace missing\n");
 	} else {
-		pr_alert("page last free pid %d tgid %d stack trace:\n",
-			  page_owner->free_pid, page_owner->free_tgid);
+		pr_alert("page last free pid %d tgid %d ts %llu stack trace:\n",
+			  page_owner->free_pid, page_owner->free_tgid,
+			  page_owner->free_ts_nsec);
 		stack_depot_print(handle);
 	}
 
_

Patches currently in -mm which might be from ye.liu@linux.dev are

mm-page_owner-extract-skip_buddy_pages-helper-to-unify-buddy-page-skipping.patch
mm-page_owner-add-mr_never-to-enum-migrate_reason-and-use-it-for-last_migrate_reason.patch
mm-use-enum-migrate_reason-instead-of-int-for-migration-reason-parameters.patch
mm-page_owner-hoist-config_memcg-to-function-level-for-print_page_owner_memcg.patch
mm-page_owner-add-missing-newline-to-count_threshold-format-string.patch
mm-page_owner-move-free_ts_nsec-output-to-free-section-in-__dump_page_owner.patch
mm-page_owner-drop-redundant-page_owner-prefix-from-static-symbols.patch