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Date:   Wed, 7 Sep 2022 05:45:15 -1000
From:   Tejun Heo <>
To:     Yafang Shao <>
Subject: Re: [PATCH bpf-next v3 00/13] bpf: Introduce selectable memcg for
 bpf map

On Wed, Sep 07, 2022 at 05:43:31AM -1000, Tejun Heo wrote:
> Hello,
> On Fri, Sep 02, 2022 at 02:29:50AM +0000, Yafang Shao wrote:
> ...
> > This patchset tries to resolve the above two issues by introducing a
> > selectable memcg to limit the bpf memory. Currently we only allow to
> > select its ancestor to avoid breaking the memcg hierarchy further. 
> > Possible use cases of the selectable memcg as follows,
> As discussed in the following thread, there are clear downsides to an
> interface which requires the users to specify the cgroups directly.
> So, I don't really think this is an interface we wanna go for. I was hoping
> to hear more from memcg folks in the above thread. Maybe ping them in that
> thread and continue there?

Ah, another thing. If the memcg accounting is breaking things right now, we
can easily introduce a memcg disable flag for bpf memory. That should help
alleviating the immediate breakage while we figure this out.



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