Re: mlx4 netpoll and rx/tx weirdness

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On Mon, 2014-03-17 at 17:22 -0400, David Miller wrote:
> From: Eric Dumazet <eric.dumazet@xxxxxxxxx>
> Date: Sun, 16 Mar 2014 09:17:01 -0700
> 
> > Wait a minute, I thought ndo_poll_controller() had to be synchronous,
> > not schedule a napi ?
> 
> ndo_poll_controller() basically runs the hardware interrupt handler,
> which might schedule NAPI processing.  Then netpoll invokes
> the NAPI poll in whatever state ndo_poll_controller() left it in.

Ah right, this makes sense, poll_napi() uses a spin_trylock()...



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