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Sat, 18 Apr 2026 01:55:25 -0700 (PDT) MIME-Version: 1.0 References: <20260413-mglru-reclaim-v5-0-8eaeacbddc44@tencent.com> <20260417025123.2971253-1-wxy2009nrrr@163.com> <3a28d9d327d84ae192fb3dcb925a0674@honor.com> In-Reply-To: <3a28d9d327d84ae192fb3dcb925a0674@honor.com> From: Barry Song Date: Sat, 18 Apr 2026 16:55:14 +0800 X-Gmail-Original-Message-ID: X-Gm-Features: AQROBzCJ1gCaivomkDW20N-_qm8Gvj85y2sY2ml8XUWgnv2HzzBzqcGeXhTKxmQ Message-ID: Subject: Re: [PATCH v5 00/14] mm/mglru: improve reclaim loop and dirty folio handling To: wangzicheng Cc: wangxinyu19 , "devnull+kasong.tencent.com@kernel.org" , "akpm@linux-foundation.org" , "axelrasmussen@google.com" , "baolin.wang@linux.alibaba.com" , "chenridong@huaweicloud.com" , "chrisl@kernel.org" , "david@kernel.org" , "hannes@cmpxchg.org" , "kaleshsingh@google.com" , "kasong@tencent.com" , "laoar.shao@gmail.com" , "lenohou@gmail.com" , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" , "ljs@kernel.org" , "mhocko@kernel.org" , "qi.zheng@linux.dev" , "shakeel.butt@linux.dev" , "stevensd@google.com" , "surenb@google.com" , "vernon2gm@gmail.com" , "weixugc@google.com" , "yuanchu@google.com" , "yuzhao@google.com" , "zhengqi.arch@bytedance.com" , wangzhen , wangtao Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Queue-Id: B69DD40002 X-Rspamd-Server: rspam12 X-Stat-Signature: x5t91mcfbjncagsdewfi8uannnotzy6i X-Rspam-User: X-HE-Tag: 1776502527-982310 X-HE-Meta: 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 Ga/jvVTJ dN1gwiupy5LPy7XhULNTmmuvBgLqSVgWsEQhnMguPZWc+UrVhGVNMDuQxwGriBwFKBn5pjDZeSYgZto8Gqdcl5U57Tj/aasG/z86I92g80OiycEHNwn6DNpzoybmhWnRs6mor1NPvw1KbQ2yB0q8yPuaQV1ZY4bVYPeyfUMsR4e2o3NmJqsEOdjPHsMOovZOx/qNbYsfc5OvTPmBm/WgNH33YLg/6+RwL7rclAzpUk35nogFjHznGLda131A/CmDzgnB/vNeBLqVKKglfeKFf9FBZuj7mZkOCOe7elugogyGwoJ7lIsTDyiM77EQatcm9yYFBBcgZufPVf6qPvF1A55ogEctz2NyG+Pu3EDGGyw5bpTuh4e/lfmbpBeb7w2pa1fXUisjocTVMIcNfeH1Gjo9SDcgaMz1UNFJ3T79iErQkuhcSMS/wljCnaCvCtZu8/IXzcm0AqnPysf5bwi4K5EjkYW4zMdeo3xsWmEPzYxRLZbg= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: [...] > > The performance might behave differently on devices with smaller memory > (e.g. 8=E2=80=9316GB) compared to servers with 100+GB memory, or under > moderate to heavy memory pressure. > Could this be related to patch 09/14[1] which removes folio_inc_gen() > when ` writeback || (type =3D=3D LRU_GEN_FILE && dirty)`? Very unlikely. I think this should be a positive change. Placing dirty pages in the youngest generation helps avoid unnecessary scanning, and they can still be rotated to the oldest generation once writeback is complete. > > Any comments or suggestions would be appreciated. > > [1] https://lore.kernel.org/linux-mm/20260413-mglru-reclaim-v5-0-8eaeacbd= dc44@tencent.com/T/#m568eba84d35d8d5ff519d3e29237de6d64f67659 > Thanks Barry