Re: cgroup specific sticky resources (was: Re: [PATCH bpf-next 0/5] bpf: BPF specific memory allocator.)

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Hello,

On Tue, Jul 19, 2022 at 11:46:41AM -0700, Mina Almasry wrote:
> An interface like cgroup.sticky.[bpf/tmpfs/..] would work for us
> similar to tmpfs memcg= mount option. I would maybe rename it to
> cgroup.charge_for.[bpf/tmpfs/etc] or something.

So, I'm not a fan because having this in cgroupfs would create the
expectation that these resources can be moved across cgroups dynamically
(and that's the only way the interface can be useful, right?). I'd much
prefer something a lot more minimal - e.g. temporarily allow assuming an
ancestor identity while creating a resource or sth along that line, and to
add something like that, I think we need pretty strong arguments for why it
can't be handled through cgroup layering in userspace.

Thanks.

-- 
tejun



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