From: Andrew Morton <akpm@linux-foundation.org>
To: mm-commits@vger.kernel.org,ziy@nvidia.com,vbabka@kernel.org,surenb@google.com,mhocko@suse.com,hannes@cmpxchg.org,brendan.jackman@linux.dev,lihongfu@kylinos.cn,akpm@linux-foundation.org
Subject: [merged mm-stable] mm-page_owner-preserve-original-free_pid-free_tgid-during-folio-migration.patch removed from -mm tree
Date: Thu, 08 Oct 2026 22:56:23 -0700 [thread overview]
Message-ID: <20261009055624.2F5CD1F00893@smtp.kernel.org> (raw)
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
reply other threads:[~2026-10-09 5:56 UTC|newest]
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