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b=tj2Sop8sSHOaqPkc3ZcouOA0BeyHTP/TNIJPDnKa6OL1M1cai0IJ12t6rUPYhMo5f aQ3nH2Yw94Jwug09AOD/tfVe3pKBeC/FCu84k6NzjnZwashb3wRtAKjpa3GP/XYHlS kzgxg0AZsJVSe/bGBGAt+mn8DNraSO0xzFSsLN/CYYqvlTTJHcwNPcMf+jVzseNy2N Dqeff1I9EkAZDxmvMxCjL8X6erqZTxddlEl+VwvhBEtus7/b6vjybe+uHIMe6rSgNm 6xOPif8V1incnhlbEZa6wBVHpQarnjv9J0wWGVYLVYkJbvXRrCAZ/TOi4TmrR1tEry IAUdfrT8XT33w== Date: Wed, 29 Oct 2025 08:14:25 -1000 From: Tejun Heo To: Roman Gushchin Cc: Andrew Morton , linux-kernel@vger.kernel.org, Alexei Starovoitov , Suren Baghdasaryan , Michal Hocko , Shakeel Butt , Johannes Weiner , Andrii Nakryiko , JP Kobryn , linux-mm@kvack.org, cgroups@vger.kernel.org, bpf@vger.kernel.org, Martin KaFai Lau , Song Liu , Kumar Kartikeya Dwivedi Subject: Re: [PATCH v2 02/23] bpf: initial support for attaching struct ops to cgroups Message-ID: References: <20251027231727.472628-1-roman.gushchin@linux.dev> <20251027231727.472628-3-roman.gushchin@linux.dev> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251027231727.472628-3-roman.gushchin@linux.dev> X-Stat-Signature: 4yrz8wzkn7kmw816f5ecx9ka13hhzdj5 X-Rspamd-Queue-Id: 9108514000A X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1761761667-553804 X-HE-Meta: U2FsdGVkX184UfwmI3KybsE9sp+fQxvwcv47pdOJAD4c0fH13YOS84LHQcAdu85wqzetEU3WnXtxLpOjmU7QNWsAt/gJQr5ZVta9SFWlm/RprwskujtXJx8r93qVkYuCiKC+3sV2SnbKGHUGXG/axRACINqJnMdkkNyz4HHX2X1Wh7pXLK4/zZdhhSHW900OY865rxz9TduuifTkb/Wlg3DFTOa6NFuxywaP2NARzY0Y4PT60VmSavzD5y8HYtLNxnQlfhWIw/Imp7/SIMVl+tMcYYRLQ8SWDA9ShOAjpP721aTuH99c/mei0CgHABbxIaRfTNvgr5Nv7FGlGDnwnhWqi56GH4jiGyOjXDIxkvqanhW0QUWXm2fSlttX9Ha161/Qoswa6TCR8S1oZFhUTWQD5KzpOofMvlTTojhJax1y3NBO81+xV6lYNJzJxqJWlLdPmdvp4I7XQlWsxxx7XSo+XgstSNwLsrUPyAuGllG0diNF6iWOOIIxpo4n4gzRQCBTJZanMYwFOKPELnyPxRXyNbGtXaeOux6mytwzZ4k71jMLnS9+7xhe8voYs/NUh+mgHFitnls4/jOJTjhZEzRj6a0RV8rblSnxNQDrTt/5yNnrMbkDPVvZQS999dq6dLnhSn8V77jYMMqTNbZkU3EN3m/DrXNHuEPkniuDmq53j4u5Nar1vUZAXHms02rwFXk9lxqRg1KF5BSmXrdXuoIaH3uqnVcGS3puQvd9eOteJcNb7D/K3n7zy2+iKT+S0DwnyKj9f1IONU+vNpOkoP0BSseAVQ96JYTh844Mjqy2IBOLkMl9trXmxsSE4fgXOUofpDytt1+vhAEbLwgbkVIWKNkN/6kRH2eHaUtDxPegIVj1YHnexUSG9mR48DZ3wHXOiGHqZQiEgTzDktALmQt1jcKTTUQS0a2haeKAm09iXJ8LUgwBlOpNB3H5D6m35/p0qbt4sWiP5GpNHIm 9c1LXR3c DMDv+76+CIxFwFSXq98NZbHcU/BQGzcyMfemdyQ+czUq0VXWQoo8j+EVittD4NpwtK9xCMlgezoCjFHu/0Eos5+rZThLmkVhf5QRNQggCT1nl5cio/FSFmvwJWivtHO6w9a0x4F9m3xyVtT1ELqSECuUZq34/UQj9NiuTBycaLCYKJX9CBmSb9ITz6oIXBcp7z7+ixp/dq+qBItDYb0VWRHjnN4OH060WUube3YaSUeUGtyY= 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, Oct 27, 2025 at 04:17:05PM -0700, Roman Gushchin wrote: > @@ -1849,6 +1849,7 @@ struct bpf_struct_ops_link { > struct bpf_link link; > struct bpf_map __rcu *map; > wait_queue_head_t wait_hup; > + u64 cgroup_id; > }; BTW, for sched_ext sub-sched support, I'm just adding cgroup_id to struct_ops, which seems to work fine. It'd be nice to align on the same approach. What are the benefits of doing this through fd? Thanks. -- tejun