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AJvYcCWqnHl94fhuH4DjnLpNO5loePMBR7q7GzBhBCmlvzKky06AALEDfZ9OZf5pH5mfB2hyr8BeTkobhA==@kvack.org X-Gm-Message-State: AOJu0YxT8XSazX2+AgaohNyQ4nApvVSic4FrDVw2dStpeprGsN7NMXXL q7UdgYk120MGPc3aN02gPJoueyYHSQQPuiPD5+lTm4HYV8dc0BKyWLuwFFrtfKGlc0On+N8AwiF TCYm/qW+InbmF0Km3hiSezgQ51phDiUU= X-Gm-Gg: AY/fxX6X63V4fYptzqaeTrC0GRoTkwDRAAEj8SUXh3/ASdl5DLYQ9mpG1ezoxC5FClt JKzFeQhDMGhwhhndOYdWSAxLQz+kUV1ZzsYYFNGjbzIT1H3Gn5WoW4C4+iPSH2+kaADboIGXa4w /EmCsPdCGat9kQyrUE7mlY7y36YtO/nO8ehKvBfrs8+Ydgt2mM6Vb/EQ72Y9kS7qwv7m3wNNtsp zfnoAeqzqdYxpQK/INq6T0DM9PCJVNSKfWEjw+juKVpPm9M5cVmE8FTdvLTviv3n4vou1r0 X-Google-Smtp-Source: AGHT+IFbwWNUxSaChd2OuHftBW+AAdLfRyTXjDRPDHTwTeLXfg251DqBzw5mdGlkv0MXjfSaYz7092MOEjJvUXs4sSA= X-Received: by 2002:a05:690e:206:b0:63d:bfad:6c7 with SMTP id 956f58d0204a3-6466a8aba70mr9964995d50.58.1766545315638; Tue, 23 Dec 2025 19:01:55 -0800 (PST) MIME-Version: 1.0 References: <20251223044156.208250-1-roman.gushchin@linux.dev> In-Reply-To: <20251223044156.208250-1-roman.gushchin@linux.dev> From: Yafang Shao Date: Wed, 24 Dec 2025 11:01:18 +0800 X-Gm-Features: AQt7F2pR7dGxQ6UGyYEhLIEnnYYQxm2KwapPQ3bSkmjzaZNl2u4VYPoOrRhcJS0 Message-ID: Subject: Re: [PATCH bpf-next v4 0/6] mm: bpf kfuncs to access memcg data To: Roman Gushchin Cc: bpf@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, JP Kobryn , Alexei Starovoitov , Daniel Borkmann , Shakeel Butt , Michal Hocko , Johannes Weiner Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspam-User: X-Rspamd-Queue-Id: A3DEC100007 X-Rspamd-Server: rspam10 X-Stat-Signature: 14tzsfc44josmqm76r9rp1zorzh1hi94 X-HE-Tag: 1766545316-991099 X-HE-Meta: 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 t53zOcL8 +N/8vSeyKKfbvxvEBHuWGLEeoRj70Xf16BvEp1QUfYNaa4P/bAUbLIMQr9zz3nb7q5WitI/qXzrXdY0WXQQplSvZ66ormzZNEawPDyyACii7gaQGYY+ljsLVVn4Zkst5AJugXgPM6JvJaAe6x9tTbN6FHlb5DvDyXVl10Reo1PJeH5wiczOXqFqi7cZZw6i6FOlOtqXkQvxBC+xyCJcqbZ6nykMuNK8NiOeIrd9fySpj4Vt3347TBVh1YdnygUeOL2ibgoNZzgTYjQfV1xVG+E1MzI5ST4MYKlAT2bf2iHlEPbJfMqyDkLDu68UlazEuyTc3zsKqWCVIp9b2VyEW6Mvjg9zGyZgGsx5OA1/0dTShHNgM36gNCEHOT4hzb4om8IuOr/RnRJ5GiKY8F6ET27VG6jgnd3l4GxNxBYxjTZOufLbDNVYa56PonlA== 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: On Tue, Dec 23, 2025 at 12:43=E2=80=AFPM Roman Gushchin wrote: > > Introduce kfuncs to simplify the access to the memcg data. > These kfuncs can be used to accelerate monitoring use cases and > for implementing custom OOM policies once BPF OOM is landed. > > This patchset was separated out from the BPF OOM patchset to simplify > the logistics and accelerate the landing of the part which is useful > by itself. No functional changes since BPF OOM v2. Hello Roman, Thanks for driving the BPF-MM upstreaming work=E2=80=94this is great progre= ss. Would it be possible to upstream the bpf_st_ops and cgroups patch as a standalone series as well? [0] While the upstreaming of BPF-THP is currently stalled, we are actively experimenting with more BPF-MM related features=E2=80=94like BPF-based NUMA balancing=E2=80=94on our production servers. This work is a great fit for per-cgroup tuning via BPF, and having your bpf_st_ops and cgroups changes upstream would be very helpful for these efforts. [0] https://lore.kernel.org/bpf/CAADnVQJGiH_yF=3DAoFSRy4zh20uneJgBfqGshubLM= 6aVq069Fhg@mail.gmail.com/ --=20 Regards Yafang