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b=J+snn06h+IYhepopRmbvt8zlgXQzsk6ymnBqQttXNsd2cAGH3KYMr8zVUQcNDD3jN YM5zjB1ENrcxFa7Dqk6Wx3PVrpQxby+frFaLCEQhyY844KTRzFe3cH1bzE4S939zG9 BRsNxIlJdrRa+2ma2pfRfVTmWf0EW0ElZsxsen+ENsWYBCsImW1J5qDg3a1WCK3EUS 0gkrEzn+7zUIY5wxIZOro6siQoFX3EbehnqyyovCVg1VtrEibxGFtngGvt8jO6jrNE 6P+B9Bn9y1WKSAuSfN0n71SqtCZEZoQFwsKzA5DzDSPZpPS6MuFlDHu0a/58r3lPYY oAS9LMgXZYuHA== Date: Mon, 10 Nov 2025 06:04:30 -1000 From: Tejun Heo To: Michal =?iso-8859-1?Q?Koutn=FD?= Cc: Leon Huang Fu , linux-mm@kvack.org, hannes@cmpxchg.org, mhocko@kernel.org, roman.gushchin@linux.dev, shakeel.butt@linux.dev, muchun.song@linux.dev, akpm@linux-foundation.org, joel.granados@kernel.org, jack@suse.cz, laoar.shao@gmail.com, mclapinski@google.com, kyle.meyer@hpe.com, corbet@lwn.net, lance.yang@linux.dev, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org Subject: Re: [PATCH mm-new v3] mm/memcontrol: Add memory.stat_refresh for on-demand stats flushing Message-ID: References: <20251110101948.19277-1-leon.huangfu@shopee.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-Rspamd-Queue-Id: 3CFBB16001B X-Stat-Signature: nm5pxho3igwzdk7bnxhycnbgk4d6drpg X-Rspamd-Server: rspam02 X-Rspam-User: X-HE-Tag: 1762790673-36772 X-HE-Meta: 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 bnQ== 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: Hello, On Mon, Nov 10, 2025 at 02:50:11PM +0100, Michal Koutný wrote: > All in all, I'd like to have more backing data on insufficiency of (all > the) rstat optimizations before opening explicit flushes like this > (especially when it's meant to be exposed by BPF already). +1. If the current behavior introduces errors too significant to ignore, I'd much rather see it fixed from the implementation side rather than exposing internal operation details like this. Thanks. -- tejun