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From: Shakeel Butt To: Matthew Wilcox Cc: Kairui Song , 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-Migadu-Flow: FLOW_OUT X-Stat-Signature: j4cu1sry6pgoacm865wpzfi7zrt7tc4m X-Rspamd-Server: rspam09 X-Rspam-User: X-Rspamd-Queue-Id: 5A3DF40011 X-HE-Tag: 1772214965-893847 X-HE-Meta: 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 dZSmvMxs J4UC25o4bURAiXHWpT63qzTD8EDiQ8edSbRUAg8DtxsJHQGdJUF5ZxU9t5HdOnIHt8//j30dbqbe8ACoCNVoV6dc/MjpLMlTTDuZuU20rxFQPeSkhld6WnVR9yw1L+vEet/HqUTDSmiPRIXKMmQSe1MGit0Y0mbzNg1bnJcseCaImixNzbKofFbH/ZFhhiOK89x2McbFZfFKETHsgaq0y9+YZyw== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu, Feb 26, 2026 at 03:54:22PM +0000, Matthew Wilcox wrote: > 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. I have very similar concerns. Though rather than ripping it out, I would like we put efforts in unifying the two reclaim mechanism (traditional & MGLRU) over improving MGLRU. >