linux-kernel - Re: [PATCH RFC v2] mm: add support for dropping LRU recency on process exit

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Message-ID: <iozdmu4wqtmq5kbd5d3j3f6xim5tsoqwymbdoo3c6v24p2xtej@kiedlpja574i>
Date: Thu, 22 May 2025 15:07:05 -0400
From: "Liam R. Howlett" <Liam.Howlett@...cle.com>
To: Barry Song <21cnbao@...il.com>
Cc: akpm@...ux-foundation.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, zhengtangquan@...o.com,
        Barry Song <v-songbaohua@...o.com>,
        Baolin Wang <baolin.wang@...ux.alibaba.com>,
        David Hildenbrand <david@...hat.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Matthew Wilcox <willy@...radead.org>,
        Oscar Salvador <osalvador@...e.de>,
        Ryan Roberts <ryan.roberts@....com>, Zi Yan <ziy@...dia.com>,
        Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
        Vlastimil Babka <vbabka@...e.cz>, Mike Rapoport <rppt@...nel.org>,
        Suren Baghdasaryan <surenb@...gle.com>, Michal Hocko <mhocko@...e.com>
Subject: Re: [PATCH RFC v2] mm: add support for dropping LRU recency on
 process exit

* Barry Song <21cnbao@...il.com> [250521 22:05]:
> Hi Liam,
> I really appreciate your review—thank you!

Thanks.

This came up when discussing another policy type control to an entire
mm [1].

It looks like the consensus is that a new system call for memory
specific controls might be the best way forward, and your requirement
fits well into this idea.

I'd be interested in hearing what you think on this plan.

[1]. https://lore.kernel.org/all/a8aedeb6-2179-4e53-8310-5b81438c2b80@redhat.com/

Regards,
Liam