From: Andrew Morton <akpm@linux-foundation.org>
To: "JP Kobryn (Meta)" <jp.kobryn@linux.dev>
Cc: linux-mm@kvack.org, mst@redhat.com, mhocko@suse.com,
vbabka@suse.cz, apopple@nvidia.com, axelrasmussen@google.com,
byungchul@sk.com, cgroups@vger.kernel.org, david@kernel.org,
eperezma@redhat.com, gourry@gourry.net, jasowang@redhat.com,
hannes@cmpxchg.org, joshua.hahnjy@gmail.com,
Liam.Howlett@oracle.com, linux-kernel@vger.kernel.org,
lorenzo.stoakes@oracle.com, matthew.brost@intel.com,
rppt@kernel.org, muchun.song@linux.dev,
zhengqi.arch@bytedance.com, rakie.kim@sk.com,
roman.gushchin@linux.dev, shakeel.butt@linux.dev,
surenb@google.com, virtualization@lists.linux.dev,
weixugc@google.com, xuanzhuo@linux.alibaba.com,
ying.huang@linux.alibaba.com, yuanchu@google.com, ziy@nvidia.com,
kernel-team@meta.com
Subject: Re: [PATCH v4] mm: move pgscan, pgsteal, pgrefill to node stats
Date: Thu, 19 Feb 2026 14:11:16 -0800 [thread overview]
Message-ID: <20260219141116.2cebbc75f4d79f06813d83a5@linux-foundation.org> (raw)
In-Reply-To: <20260219171124.19053-1-jp.kobryn@linux.dev>
On Thu, 19 Feb 2026 09:11:24 -0800 "JP Kobryn (Meta)" <jp.kobryn@linux.dev> wrote:
> There are situations where reclaim kicks in on a system with free memory.
> One possible cause is a NUMA imbalance scenario where one or more nodes are
> under pressure. It would help if we could easily identify such nodes.
>
> Move the pgscan, pgsteal, and pgrefill counters from vm_event_item to
> node_stat_item to provide per-node reclaim visibility. With these counters
> as node stats, the values are now displayed in the per-node section of
> /proc/zoneinfo, which allows for quick identification of the affected
> nodes.
This runs afoul of
https://lkml.kernel.org/r/20260123150108.43443-2-wujianyue000@gmail.com.
Please redo against mm.git's mm-new branch?
prev parent reply other threads:[~2026-02-19 22:11 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-19 17:11 JP Kobryn (Meta)
2026-02-19 22:11 ` Andrew Morton [this message]
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