From: Johannes Weiner <hannes@cmpxchg.org>
To: Zicheng Wang <wangzicheng@honor.com>
Cc: akpm@linux-foundation.org, yuanchu@google.com, tj@kernel.org,
mkoutny@suse.com, corbet@lwn.net, kasong@tencent.com,
qi.zheng@linux.dev, shakeel.butt@linux.dev, baohua@kernel.org,
axelrasmussen@google.com, weixugc@google.com, david@kernel.org,
ljs@kernel.org, liam@infradead.org, vbabka@kernel.org,
rppt@kernel.org, surenb@google.com, mhocko@suse.com,
roman.gushchin@linux.dev, muchun.song@linux.dev,
cgroups@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
willy@infradead.org, denghaojie@honor.com, baoquan.he@linux.dev,
kaleshsingh@google.com, tjmercier@google.com,
tao.wangtao@honor.com, zhangji1@honor.com, wangzhen5@honor.com
Subject: Re: [RFC v2 0/3] mm/mglru: proactive aging via memory.aging
Date: Wed, 15 Jul 2026 16:00:46 +0200 [thread overview]
Message-ID: <20260715140046.GO276793@cmpxchg.org> (raw)
In-Reply-To: <20260714121529.2237261-1-wangzicheng@honor.com>
On Tue, Jul 14, 2026 at 08:15:26PM +0800, Zicheng Wang wrote:
> MGLRU inverts the reclaim order when anonymous memory is faulted in
> bulk: anonymous pages sit in the young generations while file pages
> sit in the oldest two, so reclaim evicts hot file pages before cold
> anonymous pages.
An aging inversion in the reclaim algorithm seems like an exceedingly
poor justification for a userspace interface to work around them.
next prev parent reply other threads:[~2026-07-15 14:00 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-14 12:15 [RFC v2 0/3] mm/mglru: proactive aging via memory.aging Zicheng Wang
2026-07-14 12:15 ` [RFC v2 1/3] mm/lru_gen: add AGING counter and proactive aging helper Zicheng Wang
2026-07-14 12:15 ` [RFC v2 2/3] mm: memcontrol: add memory.aging cgroup v2 file Zicheng Wang
2026-07-14 12:15 ` [RFC v2 3/3] mm/lru_gen: expose oldest-generation page counts in memory.stat Zicheng Wang
2026-07-15 14:00 ` Johannes Weiner [this message]
2026-07-15 17:55 ` [RFC v2 0/3] mm/mglru: proactive aging via memory.aging T.J. Mercier
2026-07-16 2:29 ` Ridong Chen
2026-07-16 3:34 ` wangzicheng
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