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Date: Thu, 7 Jun 2007 13:42:55 -0500
From: Astrodog <astrodog@gmail.com>
To: "Chuck Swiger" <cswiger@mac.com>
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Cc: freebsd-current@freebsd.org,
	Abdullah Ibn Hamad Al-Marri <almarrie@gmail.com>
Subject: Re: Why not remove polling(4) from 7.0?
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On 6/7/07, Chuck Swiger <cswiger@mac.com> wrote:
>
> On Jun 7, 2007, at 11:18 AM, Abdullah Ibn Hamad Al-Marri wrote:
> [ ... ]
> > So it's recommended to use polling if I run pf and deals with DDoS?
>
> polling tends to handle a DDoS attack well compared with the default
> interrupt-driven approach.  Whether you are using pf or some other
> firewall doesn't make any particular difference.
>
> --
> -Chuck
>

As an aside, in the rare cases where the extra system load is worth it,
polling combined with a high value for HZ can also be a good way to insure
consistent low latency, even under heavy load.