[merged mm-stable] mm-page_owner-preserve-original-free_pid-free_tgid-during-folio-migration.patch removed from -mm tree

[merged mm-stable] mm-page_owner-preserve-original-free_pid-free_tgid-during-folio-migration.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm/page_owner: preserve original free_pid/free_tgid during folio migration
has been removed from the -mm tree.  Its filename was
     mm-page_owner-preserve-original-free_pid-free_tgid-during-folio-migration.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: Hongfu Li <lihongfu@kylinos.cn>
Subject: mm/page_owner: preserve original free_pid/free_tgid during folio migration
Date: Thu, 3 Sep 2026 17:21:26 +0800

__update_page_owner_free_handle() accepts pid and tgid, but ignores them,
always storing current->pid and current->tgid.

__folio_copy_owner() forwards the original free pid/tgid during folio
migration, yet these values were overwritten by the migrating task.

Store the passed-in pid/tgid so the migrated folio keeps the original free
attribution.

Link: https://lore.kernel.org/20260903092126.24685-1-hongfu.li@linux.dev
Signed-off-by: Hongfu Li <lihongfu@kylinos.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
Cc: Brendan Jackman <brendan.jackman@linux.dev>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Zi Yan <ziy@nvidia.com>
---

 mm/page_owner.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/mm/page_owner.c~mm-page_owner-preserve-original-free_pid-free_tgid-during-folio-migration
+++ a/mm/page_owner.c
@@ -307,8 +307,8 @@ static inline void __update_page_owner_f
 			page_owner->free_handle = handle;
 		}
 		page_owner->free_ts_nsec = free_ts_nsec;
-		page_owner->free_pid = current->pid;
-		page_owner->free_tgid = current->tgid;
+		page_owner->free_pid = pid;
+		page_owner->free_tgid = tgid;
 	}
 	rcu_read_unlock();
 }
_

Patches currently in -mm which might be from lihongfu@kylinos.cn are

mm-hugetlb_cgroup-move-per-node-usage-on-cross-node-migration.patch
mm-hugetlb_cgroup-move-per-node-usage-on-cgroup-reparenting.patch
mm-hugetlb-account-migration-target-folio-in-per-node-nr_hugetlb-vmstat.patch
mm-memcg-migrate-per-node-hugetlb-lruvec-stat-together-with-hugetlb-folio.patch
mm-memfd-fix-hugetlb-reservation-accounting-in-error-paths.patch