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[109.81.29.251]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-479040bd209sm18794505e9.3.2025.11.25.04.55.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 25 Nov 2025 04:55:26 -0800 (PST) Date: Tue, 25 Nov 2025 13:55:25 +0100 From: Michal Hocko To: hui.zhu@linux.dev Cc: Roman Gushchin , Andrew Morton , Johannes Weiner , Shakeel Butt , Muchun Song , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Eduard Zingerman , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , Shuah Khan , Peter Zijlstra , Miguel Ojeda , Nathan Chancellor , Kees Cook , Tejun Heo , Jeff Xu , mkoutny@suse.com, Jan Hendrik Farr , Christian Brauner , Randy Dunlap , Brian Gerst , Masahiro Yamada , linux-kernel@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, Hui Zhu Subject: Re: [RFC PATCH 0/3] Memory Controller eBPF support Message-ID: References: <87ldk1mmk3.fsf@linux.dev> <895f996653b3385e72763d5b35ccd993b07c6125@linux.dev> <6ff7dad904bcb27323ea21977e1160ebfa5e283d@linux.dev> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <6ff7dad904bcb27323ea21977e1160ebfa5e283d@linux.dev> On Tue 25-11-25 12:39:11, hui.zhu@linux.dev wrote: > My goal is implement dynamic memory reclamation for memcgs without limits, > triggered by specific conditions. > > For instance, with memcg A and memcg B both unlimited, when memcg A faces > high PSI pressure, ebpf control memcg B do some memory reclaim work when > it try charge. Understood. Please also think whether this is already possible with existing interfaces and if not what are roadblocks in that direction. Thanks! -- Michal Hocko SUSE Labs