netdev - Re: [RFC PATCH 3/5] bpf: add BPF_PROG_ATTACH and BPF_PROG

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Message-ID: <20160817150849.GC6299@htj.duckdns.org>
Date:	Wed, 17 Aug 2016 11:08:50 -0400
From:	Tejun Heo <htejun@...com>
To:	Daniel Mack <daniel@...que.org>
CC:	<daniel@...earbox.net>, <ast@...com>, <davem@...emloft.net>,
	<kafai@...com>, <fw@...len.de>, <pablo@...filter.org>,
	<harald@...hat.com>, <netdev@...r.kernel.org>
Subject: Re: [RFC PATCH 3/5] bpf: add BPF_PROG_ATTACH and BPF_PROG_DETACH
 commands

Hello, again.

Just one addition.

On Wed, Aug 17, 2016 at 04:35:24PM +0200, Daniel Mack wrote:
> created. To bring this more in line with how cgroups usually work, I
> guess we should add code to copy over the bpf programs from the ancestor
> once a new cgroup is instantiated.

Please don't copy the actual configuration or program.  Every case
where a cgroup controller took this approach turned out pretty badly.
It gets really confusing.

Thanks.

-- 
tejun