From: Michal Hocko <mhocko@suse.com>
To: Hillf Danton <hdanton@sina.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>,
akpm@linux-foundation.org, hannes@cmpxchg.org,
Roman Gushchin <roman.gushchin@linux.dev>,
shakeel.butt@linux.dev, yosryahmed@google.com,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 4/4] mm: introduce per-node proactive reclaim interface
Date: Thu, 17 Jul 2025 09:39:39 +0200 [thread overview]
Message-ID: <aHiouwRh_Z7MPfV-@tiehlicka> (raw)
In-Reply-To: <20250717064925.2304-1-hdanton@sina.com>
On Thu 17-07-25 14:49:24, Hillf Danton wrote:
> Davidlohr Bueso <dave@stgolabs.net> writes:
>
> > This adds support for allowing proactive reclaim in general on a
> > NUMA system. A per-node interface extends support for beyond a
> > memcg-specific interface, respecting the current semantics of
> > memory.reclaim: respecting aging LRU and not supporting
> > artificially triggering eviction on nodes belonging to non-bottom
> > tiers.
> >
> > This patch allows userspace to do:
> >
> > echo "512M swappiness=10" > /sys/devices/system/node/nodeX/reclaim
> >
> When kswapd is active, this is not needed.
> When kswapd is idle, why is this needed?
Usecases are described in the section of the email you haven't quoted in your reply.
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2025-07-17 7:39 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-23 18:58 [PATCH -next v2 0/4] mm: per-node proactive reclaim Davidlohr Bueso
2025-06-23 18:58 ` [PATCH 1/4] mm/vmscan: respect psi_memstall region in node reclaim Davidlohr Bueso
2025-06-25 17:08 ` Shakeel Butt
2025-07-17 1:44 ` Roman Gushchin
2025-06-23 18:58 ` [PATCH 2/4] mm/memcg: make memory.reclaim interface generic Davidlohr Bueso
2025-06-23 21:45 ` Andrew Morton
2025-06-23 23:36 ` Davidlohr Bueso
2025-06-24 18:26 ` Klara Modin
2025-07-17 1:58 ` Roman Gushchin
2025-07-17 16:35 ` Davidlohr Bueso
2025-07-17 22:17 ` Shakeel Butt
2025-07-17 22:52 ` Andrew Morton
2025-07-17 23:56 ` Davidlohr Bueso
2025-07-18 0:17 ` Shakeel Butt
2025-06-23 18:58 ` [PATCH 3/4] mm/vmscan: make __node_reclaim() more generic Davidlohr Bueso
2025-07-17 2:03 ` Roman Gushchin
2025-07-17 22:25 ` Shakeel Butt
2025-06-23 18:58 ` [PATCH 4/4] mm: introduce per-node proactive reclaim interface Davidlohr Bueso
2025-06-25 23:10 ` Shakeel Butt
2025-06-27 19:07 ` SeongJae Park
2025-07-17 2:46 ` Roman Gushchin
2025-07-17 16:26 ` Davidlohr Bueso
2025-07-17 22:46 ` Andrew Morton
2025-07-17 6:49 ` Hillf Danton
2025-07-17 7:39 ` Michal Hocko [this message]
2025-07-17 22:28 ` Shakeel Butt
2025-06-23 21:50 ` [PATCH -next v2 0/4] mm: per-node proactive reclaim Andrew Morton
2025-07-16 0:24 ` Andrew Morton
2025-07-16 15:15 ` Shakeel Butt
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