From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9A036C433EF for ; Tue, 18 Jan 2022 09:37:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:References:In-Reply-To:Cc:To:Subject: Message-ID:From:Date:MIME-Version:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=qMEZDa/pgWwAC9pQAzWQXWIFVsLQDfRAphYqY7iOU5o=; b=Xi0yRnLqc3hYTK /BrEO5dmQkYYOJAoULTPz3WHzsaAr+tpBarp/vid2cOpG453pd4OotQueGEHPoBsqJkKwvz3oUttp ySoXH0NW4KF+w2GizFUI8nmSnq+gaKD6PHpf/Qi1jX980DPxGx6eKI2U7dsk+jo2rg2UhoRkdHpDB EkOXG9bNzE2EDPeRfvSsdIyi3TCD3IW9Zn4P1ejOrFcftUohmeFCBnoaC9j4fz7H8UwFJqeZWdZfo k6W8VfOwj3kBI7GXlQlnVSZU3lhWKlAltUr10BS0WLsc7J01EJg3hCPG16Z7vo0VM6Vm7HjixnPLv MmjemOEioSN8NsB2wlrA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1n9kuO-000vLx-Py; Tue, 18 Jan 2022 09:36:08 +0000 Received: from my.chaos-reins.com ([104.248.178.247]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1n9kuL-000vKp-6u for linux-arm-kernel@lists.infradead.org; Tue, 18 Jan 2022 09:36:06 +0000 Received: (Haraka outbound); Tue, 18 Jan 2022 09:36:01 +0000 Authentication-Results: my.chaos-reins.com; auth=pass (login) Received: from m.chaos-reins.com (21d594ba-beef-4400-bc88-b496d6dacd5a.cloudron [172.18.16.1]) by my.chaos-reins.com (Haraka/2.8.28) with ESMTPA id 8630A604-7CDC-4F56-BC02-9865974B8D06.1 envelope-from (authenticated bits=0); Tue, 18 Jan 2022 09:36:01 +0000 MIME-Version: 1.0 Date: Tue, 18 Jan 2022 09:36:01 +0000 X-Mailer: RainLoop/1.16.0 From: "Donald Carr" Message-ID: Subject: Re: [PATCH v6 0/9] Multigenerational LRU Framework To: "Yu Zhao" Cc: "Andi Kleen" , "Catalin Marinas" , "Dave Hansen" , "Hillf Danton" , "Jens Axboe" , "Jesse Barnes" , "Johannes Weiner" , "Jonathan Corbet" , "Matthew Wilcox" , "Mel Gorman" , "Michael Larabel" , "Michal Hocko" , "Rik van Riel" , "Vlastimil Babka" , "Will Deacon" , "Ying Huang" , linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, page-reclaim@google.com, x86@kernel.org, "Andrew Morton" , "Linus Torvalds" In-Reply-To: References: <20220104202227.2903605-1-yuzhao@google.com> DKIM-Signature: v=1; a=rsa-sha256; bh=hOtzxRssqC3l7oqL8Wf80/oCWxDs7JXspEQpiCwzMik=; c=relaxed/simple; d=chaos-reins.com; h=from:subject:date:message-id:to:cc:mime-version; s=cloudron; b=IgaPi/pt7BRp7bjlfgUvPiJN7/YwMQCMwsmNETelA7tikFfLy570SUa2bNHmc4quqjevtpMhwUDXzURBvYqJNzY1ROqcKc2c6ZLQ04ELbm4JAkFFawva0U7U81kmDAYKFrN4lAY/5PPvwisV1HrpK4vOvwuSe45R9CPeWA44Hpw= X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220118_013605_291877_929BFA27 X-CRM114-Status: UNSURE ( 9.11 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org January 18, 2022 1:21 AM, "Yu Zhao" wrote: > On Tue, Jan 11, 2022 at 01:41:22AM -0700, Yu Zhao wrote: > >> On Tue, Jan 04, 2022 at 01:30:00PM -0700, Yu Zhao wrote: >> On Tue, Jan 04, 2022 at 01:22:19PM -0700, Yu Zhao wrote: >>> TLDR >>> ==== >>> The current page reclaim is too expensive in terms of CPU usage and it >>> often makes poor choices about what to evict. This patchset offers an >>> alternative solution that is performant, versatile and >>> straightforward. >> >> >> >>> Summery >>> ======= >>> The facts are: >>> 1. The independent lab results and the real-world applications >>> indicate substantial improvements; there are no known regressions. >>> 2. Thrashing prevention, working set estimation and proactive reclaim >>> work out of the box; there are no equivalent solutions. >>> 3. There is a lot of new code; nobody has demonstrated smaller changes >>> with similar effects. >>> >>> Our options, accordingly, are: >>> 1. Given the amount of evidence, the reported improvements will likely >>> materialize for a wide range of workloads. >>> 2. Gauging the interest from the past discussions [14][15][16], the >>> new features will likely be put to use for both personal computers >>> and data centers. >>> 3. Based on Google's track record, the new code will likely be well >>> maintained in the long term. It'd be more difficult if not >>> impossible to achieve similar effects on top of the existing >>> design. >> >> Hi Andrew, Linus, >> >> Can you please take a look at this patchset and let me know if it's >> 5.17 material? >> >> My goal is to get it merged asap so that users can reap the benefits >> and I can push the sequels. Please examine the data provided -- I >> think the unprecedented coverage and the magnitude of the improvements >> warrant a green light. > > My gratitude to Donald who has been helping test MGLRU since v2: > > Donald Carr (d@chaos-reins.com) > > Founder of Chaos Reins (http://chaos-reins.com), an SF based > consultancy company specializing in designing/creating embedded > Linux appliances. Tested-by: Donald Carr > Can you please provide your Tested-by tags? This will ensure the credit > for your contributions. > > Thanks! _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel