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Sat, 2 May 2026 16:56:54 +0800 (CST) X-Sender: hdanton@sina.com X-Auth-ID: hdanton@sina.com X-SMAIL-MID: 3225394456816 X-SMAIL-UIID: 2C331D982AC549338A70345D4C4608C4-20260502-165654-1 From: Hillf Danton To: Matthew Wilcox Cc: Kairui Song , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [LSF/MM/BPF TOPIC] Improving MGLRU Date: Sat, 2 May 2026 16:56:39 +0800 Message-ID: <20260502085645.262-1-hdanton@sina.com> In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 42CF8140009 X-Stat-Signature: ixmg63rhgxb5yh4nho13mcak9decqqrc X-Rspam-User: X-HE-Tag: 1777712218-314727 X-HE-Meta: U2FsdGVkX19oi3Tl+mSBbMZSnSSg+8QQvp7DjaVmsVzadhECAJ25L0AvXBu1GEj0R2YRMGNwD/tY+xi0MKKiAIwK0svzA1cs7uawBVztWg2blbWlxXsv7Jw6pJFRpXH8fa20dR6xb6ZY7CeEiLM/T6ONbj7A4XOgVkvxV/8fAfDtr8gB6icDMi/GWw44laT0wfcDykkMTWD/NNBYl0B2GE/0dBwAAknP4KGyTPCz6R5OU8HyjrOPVqM7XBEeU9rUdedCYww76PymBsuOAmMfdT42qd0kNuGQU9LHhOspq0UQazxUiA0KOwcIHoTBoqvz8d/MH23D1FOUKx75AGeFdYya3P/O6V2yftSsI5R9x2KoZ80oNmEmX6+BrLu9pXwdyhxEND1BZgiac4VxAgp71qz+UoaJXT+rYo/hlsj/tNAxiawhP/43usP/APKd+/P9rqVrPDsXDURK4kB3Gfh5xh8Yu35ms8fTGcoda/TqtJTLki8PAx+eCU8dezytY6doMCY3h730zm0yWRwLzDil+TXbm+aaAMhoQohOaYslMCNAK+u68X8BhJeMpk1AxFR1x+m3SDcQ4xWAmrT6ury5kC+Bu1bEsqSn/ddTQeY84SKuw4n8M1oGFHduFCXTEf9Bv8F/qHJ+GFzMujNTpP3tbXgyYPeKHUbrZNxtwCpDg76kMHdqTA0oScz1i57P67fK/bWCc5Jw80XP1DDiU02Mc4BHgJeu+f7gx3CcdeRzSC7PAFvwBCqRedFnO8jNw2h8YInbXdrAnLjWJPaejzdUwsKrAtazCpaY0FNH9z3mHXW733dsq5o2NmlyyIWd1a2KC4CLLZvHF9R+y4/NMF4/kkkraVMGPuRQiOgiDMetWpMWPVB1wVo8U3bJuqJYUBmwxWGC3hVMEMuR5oRwAttyBMpxPCYe//CqxL/2dqZT3Gi9GKetv6PEZhK50oFCpzkBbBC8Lx8Mhu+HAx4Yvvf BWIoKGnT DHwsnTAoaRmuT81HtaxC6sF9ird0jYqzTyQAf1KsD1AJIGlBBvD+zu0wNzixAaO1wyAPmHzziXwTNzuUZipFaEiDgc5odaoLQq3DgTPyvqzs5qeT+poNDDXJO7WKC4pF+LQyTW69jbHA9twkrTg0qJUVnNb+AUNYlgz4eEPwj+Dqmako+zFchylZ84yU3EHaj8cbyzACubeUQpPkzda/JCP8P6Wwpzj+RpSB8tbg7lNEhaTOLwMAbhykzXcf9vwUtBAgGxWx+tK2OA0PMK+ePUpdERcHhL8c6Xh+SvY32n7Hzci4b7EackQe2vA== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu, 26 Feb 2026 15:54:22 +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 suspect you are kidding again. Go and cut it off then we know how sharp you are.