From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from r3-19.sinamail.sina.com.cn (r3-19.sinamail.sina.com.cn [202.108.3.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E9236188596 for ; Sat, 2 May 2026 08:57:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=202.108.3.19 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777712230; cv=none; b=l0Q9bj3eir1GslthZ+7Hxz9tEjw/IwYpQ7hYSZrrkLTUudaA0NYiXE0PNk9Mv2x0lKJuHVMzn70SlzH2/IjM7c6XwP9z3Na9IZlooY7dRfdSVbobunc7YTy8LP28ZIwhjwgmLCHul5MUidOJZTxo5ZHq4xHlYDZNAWwKLYvwAm8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777712230; c=relaxed/simple; bh=m6dbTiQNkHJBpR1vmei+bF7X74Xy0/BP5OGwlPlevj0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=lHgWZ52wWEWEcm+p52Tn4VMsfg4jM4NnUe2m/cRp1TXKQE/Wmt07J64jTEGcTW3pahTx4Z/d2eJGDBYFp1BCJ1LfeZNbopMpgL/0WWVX9NtuqW0GH2sNFTG3LzlEc8Svu4J08RFYC0nCfU2MlZi5IBYWWeellQZwbrPKgF3ZOa4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sina.com; spf=pass smtp.mailfrom=sina.com; dkim=pass (1024-bit key) header.d=sina.com header.i=@sina.com header.b=o28Qxk7v; arc=none smtp.client-ip=202.108.3.19 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sina.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sina.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=sina.com header.i=@sina.com header.b="o28Qxk7v" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sina.com; s=201208; t=1777712226; bh=Bg4nKl/A3P/H5ScoR7kQWUqva8N+zh6ipM/9Qf8Rkws=; h=From:Subject:Date:Message-ID; b=o28Qxk7vX22w5mYzKxUAO+L5HICVx8IeHSG2Vf6D8d3Uyplbhf9T0Q4G766U9EEht 8uEn61IIQm1bbHKCj4IaFmNi6twtykhyI63baN1kPOGSY2Sd5rl6dVJbt7qaMtXaYE 74kWe0umcIOexTpcsQCY9jEUfrDr6gws6LtaM7YU= X-SMAIL-HELO: localhost.localdomain Received: from unknown (HELO localhost.localdomain)([114.249.62.144]) by sina.com (10.54.253.32) with ESMTP id 69F5BC53000052B9; Sat, 2 May 2026 16:56:54 +0800 (CST) X-Sender: hdanton@sina.com X-Auth-ID: hdanton@sina.com Authentication-Results: sina.com; spf=none smtp.mailfrom=hdanton@sina.com; dkim=none header.i=none; dmarc=none action=none header.from=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: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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.