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b=IOqE3/V0x971kkvU8eXFyOtMNjZAKwL7G+daSOnhKYBKa23k9G9/pwmDvHj59u5oCiJFmue/J8Cl+e9n3A/aCsg2/VWYatR1ruuPw7NzRPrijMml8Ztt171ISJ/+ZOJ1aE1O9u7OO2R33cRTM8/1K/B5SZlNCSUmIZhDEBXlcV0= X-Alimail-AntiSpam:AC=PASS;BC=-1|-1;BR=01201311R101e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=maildocker-contentspam033037009110;MF=baolin.wang@linux.alibaba.com;NM=1;PH=DS;RN=16;SR=0;TI=SMTPD_---0X0Fk3TO_1775100912; Received: from 30.74.144.121(mailfrom:baolin.wang@linux.alibaba.com fp:SMTPD_---0X0Fk3TO_1775100912 cluster:ay36) by smtp.aliyun-inc.com; Thu, 02 Apr 2026 11:35:16 +0800 Message-ID: Date: Thu, 2 Apr 2026 11:35:15 +0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] mm: vmscan: fix dirty folios throttling on cgroup v1 for MGLRU To: Shakeel Butt Cc: Kairui Song , akpm@linux-foundation.org, hannes@cmpxchg.org, david@kernel.org, mhocko@kernel.org, zhengqi.arch@bytedance.com, axelrasmussen@google.com, yuanchu@google.com, weixugc@google.com, ljs@kernel.org, baohua@kernel.org, kasong@tencent.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Jingxiang Zeng References: <3445af0f09e8ca945492e052e82594f8c4f2e2f6.1774606060.git.baolin.wang@linux.alibaba.com> <0498d924-d76a-4d82-8767-e6297442967a@linux.alibaba.com> From: Baolin Wang In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: D6E0F100005 X-Stat-Signature: tmezobc6m8hndj5nanpmbg37zjxhm1hb X-Rspam-User: X-Rspamd-Server: rspam07 X-HE-Tag: 1775100921-501338 X-HE-Meta: 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 dL3VtlxV 34iwxVk/UU2mkRo0OekI1k9AE+4fxsfsui/zZ/pnR08AOZ0+1mkDWxLMiFgkBbeHDhY7fz/QcOQz4dl7cmGHlJzvb29HVU/jpMBWlnCoYSS9sWIlnC4Bb/51xYeWVzfefvcZ3SMiWpdFQzB/obX0TWQ3ffj9F/ME2X1Pv58pA+xMaTMZszny+hDE/NZUHBcYwqyG5B+pQ2FLVY03I79KyXO9rGW2dqWH/bEIFGndKYsqjpO9OEu93+qlmd9/47NY81dUlxJPgYioLQrfbCTTSW5yABZ/MqUC6pr1vhD8zRvwXiR/pHy7YNd0a6JQhy3lxu5CrrIJ3Q1eJsb2uZI3W8Z7aYfyISoCtq/mNKhV02Cor0aw= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 4/2/26 11:23 AM, Shakeel Butt wrote: > On Thu, Apr 02, 2026 at 10:51:37AM +0800, Baolin Wang wrote: >> >> > [...] >> >>>> This is v1 only and I don't care much but what is stopping you from moving away >>>> from v1? >>> >>> For example memsw? >>> >>> https://lore.kernel.org/linux-mm/q2x4drxpjbxcxgns6bjp446ynsxgl32ckcljqcol7posds4nit@3n3tjq35anvb/ >>> >>> I remember Jingxiang's plan is to improve the page counter first. >> >> Additionally, we still have some existing users on cgroup v1, and they will >> need some time to migrate to cgroup v2. > > Time is fine but is there any specific v1 feature which is a blocker for you. Nope, I haven’t received any blockers from our customers so far. > The memsw is a known one and is the same for Google (data center). I am aiming > to provide memsw like behavior through my memcg_ext proposal but performance is > an open question. I am aiming to have a prototype before LSFMM to further the > discussion. Great.