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Wed, 15 Jul 2026 07:16:44 -0700 (PDT) Date: Wed, 15 Jul 2026 16:16:43 +0200 From: Johannes Weiner To: Usama Arif Cc: Andrew Morton , david@kernel.org, ljs@kernel.org, liam@infradead.org, vbabka@kernel.org, rppt@kernel.org, surenb@google.com, mhocko@suse.com, kasong@tencent.com, qi.zheng@linux.dev, shakeel.butt@linux.dev, axelrasmussen@google.com, yuanchu@google.com, weixugc@google.com, chrisl@kernel.org, nphamcs@gmail.com, baoquan.he@linux.dev, youngjun.park@lge.com, roman.gushchin@linux.dev, muchun.song@linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, rientjes@google.com, kernel-team@meta.com Subject: Re: [PATCH v2 2/2] mm/vmscan: reduce lru_lock contention via vmstat-derived scan-balance cost Message-ID: <20260715141643.GQ276793@cmpxchg.org> References: <20260713163443.3562378-1-usama.arif@linux.dev> <20260713163443.3562378-3-usama.arif@linux.dev> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260713163443.3562378-3-usama.arif@linux.dev> X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 2375218000A X-Stat-Signature: 64kgiube5fpe14sbzbr7msnr61sby8ds X-HE-Tag: 1784125007-625925 X-HE-Meta: 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 mNtdhWo7 /14b3kSL1FXr8UkzZ2WbyAnX/4P46IpyTxnx2Eh74bzwItQ+8W6TZEpwrrEaU89CxAgu/KEJkHPPzh39+aoKD+JrvN2JzMjx/9VKliqPcPCPlPkDbMuX7od5HG2OHxmwRdSKsg4TR8AmWhFYJr99lyvB2RBKizMq3D1POrcYWJ+W6k2esSrwKERmIhUpuGJ2KdqwPomEL9IEkn1qjCNebYs8sUZA+bkDPVPlEdsXbeum0AL7f0Y0SzjfIWiFCtreZlp6pS1KSdrOEPvjyu5pY9L1ppZ4tFGpi0R7XtD3tgyajXzi2lwD65kit3i5iGSK4a/t5MKNrpqGI60CyChlJyAuzUnBF0DT8co9Zv2gWqJhuC8825nwScpVJmC803N8+NeBMWUru6Mkze0VjWX6HLGbrX24tf4QO9vGNu+aq9wK3wQ7nRrZi0tDiGzumGOCGgezCHEY4F0ymrt4= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Mon, Jul 13, 2026 at 09:34:17AM -0700, Usama Arif wrote: > @@ -323,6 +323,10 @@ enum node_stat_item { > PGSCAN_PROACTIVE, > PGSCAN_ANON, > PGSCAN_FILE, > + PGRECLAIM_PAGEOUT_ANON, > + PGRECLAIM_PAGEOUT_FILE, Reclaim generally doesn't write files (anymore). You can use NR_VMSCAN_WRITE for the anon counts.