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Received: from willy by casper.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1vvdh0-000000033OH-1C9m; Thu, 26 Feb 2026 15:54:22 +0000 Date: Thu, 26 Feb 2026 15:54:22 +0000 From: Matthew Wilcox To: Kairui Song Cc: lsf-pc@lists.linux-foundation.org, Axel Rasmussen , Yuanchu Xie , Wei Xu , linux-mm Subject: Re: [LSF/MM/BPF TOPIC] Improving MGLRU Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Queue-Id: A7393140006 X-Stat-Signature: j5wgntnugtwhgsqk5pocmy8mpbri7rba X-Rspam-User: X-Rspamd-Server: rspam04 X-HE-Tag: 1772121265-169957 X-HE-Meta: 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 JeYfSH3o KYw99cl7Rt/fZywqpzaM5xaixZD99JXOKXAEbTWyD6xpehkAXjwTl6gNLfoy9fvrQfwoKTimcjEa0pOrrtfZg92RgKRghXt8LBMX2sfUoN0GyfO8+pv0PbfZSv/0Ot9saturkZ4s6dWNwa8HE+aIzldROiSmaoJsSJ7iJ3c5hjJCIQ86l/1x5uXiKTMNAidTej9OaeQs3mxPxTG02a+GvCB1MMv3dau1YAqFFoQ3CgRG/4xAGSvTJkymtMw== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, Feb 20, 2026 at 01:25:33AM +0800, Kairui Song wrote: > MGLRU has been introduced in the mainline for years, but we still have two LRUs > today. There are many reasons MGLRU is still not the only LRU implementation in > the kernel. To my mind, the biggest problem with MGLRU is that Google dumped it on us and ran away. Commit 44958000bada claimed that it was now maintained and added three people as maintainers. In the six months since that commit, none of those three people have any commits in mm/! This is a shameful state of affairs. I say rip it out.