netdev - Re: [PATCH net] Panic when tc_lookup_action_n finds a partially initialized action.

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Date:   Tue, 11 Oct 2016 02:28:05 -0700
From:   Krister Johansen <kjlx@...pleofstupid.com>
To:     Cong Wang <xiyou.wangcong@...il.com>
Cc:     Jamal Hadi Salim <jhs@...atatu.com>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>
Subject: Re: [PATCH net] Panic when tc_lookup_action_n finds a partially
 initialized action.

On Wed, Oct 05, 2016 at 11:01:38AM -0700, Cong Wang wrote:
> Does the attached patch make any sense now? Our pernet init doesn't
> rely on act_base, so even we have some race, the worst case is after
> we initialize the pernet netns for an action but its ops still not
> visible, which seems fine (at least no crash).

I tried to reproduce the panic with this latest patch, but I am unable
to do so.  The one difference I notice between this patch, and the one I
sent to the list, is that with yours it takes much longer before we get
any output from the simultaneous launch of these containers.  Presumably
that's the extra latency added by allowing many extra modprobe calls to
get spawned by request_module().

-K