Re: workqueue for pr_input

[Ryota Ozaki <ozaki-r%netbsd.org@localhost>]

On Mon, Jan 23, 2017 at 10:01 PM, Thor Lancelot Simon <tls%panix.com@localhost> wrote:
> 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.

Yes, so I proposed this approach regardless of the overhead.

If none objects, I'm going to implement a complete version of my proposal
in protosw.

  ozaki-r