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From: Tejun Heo <tj@kernel.org>
To: Yafang Shao <laoar.shao@gmail.com>
Cc: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org,
	eddyz87@gmail.com, memxor@gmail.com, mingo@redhat.com,
	peterz@infradead.org, juri.lelli@redhat.com,
	vincent.guittot@linaro.org, akpm@linux-foundation.org,
	david@kernel.org, gourry@gourry.net, hannes@cmpxchg.org,
	mkoutny@suse.com, shakeel.butt@linux.dev,
	roman.gushchin@linux.dev, yu.c.chen@intel.com,
	zhao1.liu@intel.com, bpf@vger.kernel.org, linux-mm@kvack.org,
	cgroups@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH v2 0/3] BPF-based per-cgroup NUMA balancing mode selection
Date: Mon, 12 Oct 2026 07:51:52 -1000	[thread overview]
Message-ID: <d9a3367a1852158f60cc2e89677fb12f@kernel.org> (raw)
In-Reply-To: <20261012120438.52849-1-laoar.shao@gmail.com>

Hello,

On Mon, Oct 12, 2026 at 08:04:35PM +0800, Yafang Shao wrote:
> This series adds a bpf_numab_ops struct_ops which attaches to a
> cgroup. The kernel consults the policies of the matching cgroup and of
> every ancestor and combines what they return.

The op doesn't compute anything. It returns a fixed mode per cgroup and
that's all the series uses it for. BPF is unnecessary here. This is a
prctl() feature, not a struct_ops one.

Thanks.

-- 
tejun

  parent reply	other threads:[~2026-10-12 17:51 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-10-12 12:04 Yafang Shao
2026-10-12 12:04 ` [RFC PATCH v2 1/3] sched: add helpers for numa balancing Yafang Shao
2026-10-13  7:38   ` David Hildenbrand (Arm)
2026-10-13  9:14     ` Yafang Shao
2026-10-12 12:04 ` [RFC PATCH v2 2/3] sched: add per-cgroup NUMA balancing mode selection via BPF Yafang Shao
2026-10-12 12:04 ` [RFC PATCH v2 3/3] selftests/bpf: add tests for the bpf_numab_ops struct_ops Yafang Shao
2026-10-12 17:51 ` Tejun Heo [this message]
2026-10-13  2:16   ` [RFC PATCH v2 0/3] BPF-based per-cgroup NUMA balancing mode selection Yafang Shao
2026-10-13 18:02     ` Tejun Heo
2026-10-13 15:49 ` Gregory Price

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