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Received: from willy by casper.infradead.org with local (Exim 4.97.1 #2 (Red Hat Linux)) id 1rcGHx-0000000ESL2-2C4x; Tue, 20 Feb 2024 02:55:21 +0000 Date: Tue, 20 Feb 2024 02:55:21 +0000 From: Matthew Wilcox To: =?utf-8?B?5p2O5Z+56ZSL?= Cc: akpm@linux-foundation.org, david@redhat.com, osalvador@suse.de, linux-mm@kvack.org, linux-kernel@vger.kernel.org, v-songbaohua@oppo.com, gregkh@google.com, tkjos@google.com Subject: Re: [PATCH 0/2] Support kshrinkd Message-ID: References: <20240219141703.3851-1-lipeifeng@oppo.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-Rspamd-Queue-Id: DD7CC14000E X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: x5qrtqzcj8bk9jg6yo9jakm6g4uahczu X-HE-Tag: 1708397726-618147 X-HE-Meta: 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 SslLiWWs f/TVYPvqj/zTjRgUQlIZd21jQ8HGqSYZcz5LuYNsq4Re/9RbNrXGv4xF86XUJepMocyabsCvDjPPGGwirhIRL2RgWznc5YUlVfaU2rcjiA3xg81es9/iFNKSK3oJSiwAKRxaYpVRKk6Kx2q6nALiVfCDldJSqyJt4f7A1 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, Feb 20, 2024 at 10:04:33AM +0800, 李培锋 wrote: > Monkey-test in phone with 16G-ram for 300 hours shows that almost one-third > > of the contended-pages can be freed successfully next time, putting back > those > > folios to LRU's head would break the rules of inative-LRU. You talk about "the rules of inactive LRU" like we care. The LRU is an approximation at best. What are the *consequences*? Is there a benchmark that executes more operations per second as a result of this patch?