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Tue, 18 Jan 2022 01:21:24 -0800 (PST) Date: Tue, 18 Jan 2022 02:21:21 -0700 From: Yu Zhao To: Donald Carr 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 Subject: Re: [PATCH v6 0/9] Multigenerational LRU Framework Message-ID: References: <20220104202227.2903605-1-yuzhao@google.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220118_012129_465350_399B9DA3 X-CRM114-Status: GOOD ( 24.51 ) 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 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. 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