From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f42.google.com (mail-wm1-f42.google.com [209.85.128.42]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6EDCA13D51E for ; Sat, 2 May 2026 11:53:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.42 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777722804; cv=none; b=E1AoY8IaAA7AIxhjbvRCP7ixUZktNsG1zy/Wh6Hh9hBLKW99edOzpEh23iWlWPd8NXfSgMXwGckfW9TruSuwqu07oi5PI7WEMIqIddkUGDkU9bQqQ2KOzZiYoKiRXXUF1i3a6uEQ6faOW4RN10fyeNRF7SjpLxc+z88/OEcydgc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777722804; c=relaxed/simple; bh=L1O9c/z4/icn+xwbIW8V503kHnKQDFsxvmIdUw+/d2g=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=AYukCaHiTNak7ithRJpl7xGvVUcnwW5dIqBE+FcVuz0plYw4vOv/cAPk5ibqeXbcTilI2PboVrJIpCU1mVCxzbppSP7ymtHvDq+YoH32I0Y42xSytHdLkeRd2kPDoNKXL4VmGoxTaUJYlxMkHnJQlxcsj6qxrlfl6oSOmVjBV4s= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=suse.com; spf=pass smtp.mailfrom=suse.com; dkim=pass (2048-bit key) header.d=suse.com header.i=@suse.com header.b=WX3/wCtx; arc=none smtp.client-ip=209.85.128.42 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=suse.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=suse.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=suse.com header.i=@suse.com header.b="WX3/wCtx" Received: by mail-wm1-f42.google.com with SMTP id 5b1f17b1804b1-48a525dd2b5so3111365e9.2 for ; Sat, 02 May 2026 04:53:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=google; t=1777722802; x=1778327602; darn=vger.kernel.org; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=9MwZ67b6kVq0qP5McWKtdO/QZVgJMGMPc9j3uB7+0BE=; b=WX3/wCtxBxorxfx9ig/TK+O/5KhZhKe9iZnDLd74G8+Z7+58TebkvZdxHvH1/I9fo8 rgGyMOWBQNxg/AQoiTkvywiKFsM0yFu218mgv/2c7R5wADvHX10f/uR5hkIK3QLDNtq3 VR7uur2pkoWRaxUkKN2n8feZUt2YhIFTV+4g9lNPykhxc61DfuoUpAIM6tKaow8pT9eD zvb0qLJzL5HK02bHp2Q/hwkQCy3SZdzWXCdTMhmosm6Eu2FT+G1V/7EYtDLAT+vDxpxT StckwjjZArUFkCNOSPhLkRG+IdoBZQ3ZmaOQ5lJpBJk4Q88cOLs/LfcKsFOh0uV+iILH WgsA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777722802; x=1778327602; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :x-gm-gg:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=9MwZ67b6kVq0qP5McWKtdO/QZVgJMGMPc9j3uB7+0BE=; b=eqZfFSFZUeQXWoeB3UKYqMmJTmMgBhLHqEU889fxiHcUgdMb7Wzt0ukpZ42noxt12o oFEItBliUuVDPeU0mFjM9gzofqs4AMG6Sb95cahtHcLj8Kf9WWRkVZIttPIGjYjAzVLk 27qH0ThGO9Yog2bWwohhgZC8kyOHY4zxPO8FDSeo+tCbMh9XsHMgbB6nAS0D2562o51T PPu3Mixb/O0zJEzA0KSi6L4x+ZX2UGHTL6hlcDxrya4gfM+8ACADr8Cog8K/9UejW8Mt lfPYDgDpei3bsVoEmxXgLDt2jaYFuKcxqXQ9PQl5Mpj91+whqGPQB2IM2RwpbVJMiYlj krtQ== X-Forwarded-Encrypted: i=1; AFNElJ/LygxsJcufQ2bG+eby5ltI2PHS5E64ZcEX8Vp9x+oyjkBZNCSr3wKr2h/iyp4/5n0cdaDgnL2IKSyUR9I=@vger.kernel.org X-Gm-Message-State: AOJu0YyRZzf/oaAjtioxlFcKaM+u4VHbL4asRXs9lRj5B9G5nzBlMRHD Q23R5jlbDSz1jY/yHWHXGj/lbDDgPeBsdbFGmy+OgFVJ3deHPyffcRVb7e/TWH4c6FY= X-Gm-Gg: AeBDievUCNNprYQxJUYf7TK77Hmk1L9w0FElT8sXcKtFboF5CPLkJ6vZSrifFmlA5IZ +YCbiSY6KKHqkSwkr2BRHfUOrZl4G79q/uZ4iS8W0imuaeV5HfSRWoQRGct7FecsH6uoO/QMubQ osWfIMcwCmoDOzl/PNOjDzgieBs+8+0dE8tjWSs+64d1CPvMArK3xHQwtj8NVOxA23/eBdbjxyW JYLP/fS+crmt0G2xvRj40tzuznuw8A0MUPbVyAN+NMgaovz4GymX6L2STE8RgVDociXx5dBGZFY Z2iYKtD8U1WYVaN7mGQQh2avNXWZQsJItLjVXPnEwLIAJ163GEx33hU7Zv0Oj/yexY8p+NnacUQ zmkp26LptbMJ8NRhdDKJOmht3EWAFggxUVWTgoL42+AZ5kEFBRqv7IsoKQrA1JyxyZUCWsQYEVv TjjZzy7z6kkK/ULolD2a60ZE4q1FZ7d6D3wnviwnMkglH88veaqrL2E8LwmrC4BH8iq+JzFvlel 00j5Rk= X-Received: by 2002:a05:600c:46c6:b0:48a:5302:8ed9 with SMTP id 5b1f17b1804b1-48a980fb90fmr20789835e9.0.1777722801649; Sat, 02 May 2026 04:53:21 -0700 (PDT) Received: from ?IPV6:2001:1a48:8:903:1ed6:4f73:ce38:f9d4? ([2001:1a48:8:903:1ed6:4f73:ce38:f9d4]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-44a8ef52854sm11695231f8f.12.2026.05.02.04.53.21 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 02 May 2026 04:53:21 -0700 (PDT) Message-ID: <83c146d2-d52f-41f3-975d-ad607a6f741c@suse.com> Date: Sat, 2 May 2026 13:53:20 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [LSF/MM/BPF TOPIC] Improving MGLRU Content-Language: en-US To: Hillf Danton , Matthew Wilcox Cc: Kairui Song , linux-mm@kvack.org, linux-kernel@vger.kernel.org References: <20260502085645.262-1-hdanton@sina.com> From: Vlastimil Babka In-Reply-To: <20260502085645.262-1-hdanton@sina.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 5/2/26 10:56, Hillf Danton wrote: > 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. > I can't wait for the day when you finally decide to do that with your e-mail "contributions".