Subject: Re: [PATCH -rt DO NOT APPLY] Fix for tg3 networking lockup

From: "Michael Chan" <[email-masked]>
Date: Thu, 03 Aug 2006 17:16:40 -0700

On Thu, 2006-08-03 at 17:01 -0700, David Miller wrote:
> From: Herbert Xu <[email-masked]>
> Date: Fri, 4 Aug 2006 09:59:27 +1000
> 
> > Watchdogs usually require one heartbeat every 30 seconds or so.  Does
> > the ASF heartbeat need to be that frequent?
> 
> The ASF heartbeat needs to be sent every 2 seconds.
> 

Yep, we send it every 2 seconds and it will reset in 5 seconds after the
last heartbeat.  So the margin is 3 seconds.  These numbers are somewhat
arbitrary and the goal is to allow ASF to function properly without too
much delay after the system has crashed.