Re: workqueue for pr_input

[Thor Lancelot Simon <tls%panix.com@localhost>]

On Mon, Jan 23, 2017 at 05:58:20PM +0900, Ryota Ozaki wrote:
> 
> The demerit is that that mechanism adds non-trivial
> overhead; RTT of ping increases by 30 usec.

I don't see why overhead for control protocols like ICMP matters.  I
think if you look at longstanding commercial designs for networking
equipment -- software and hardware alike -- for literally decades they
have taken the approach of optimizing the fast path (forwarding, data
protocol performance) while allowing the exception/error paths (ICMP etc.)
to be very slow.

Thor