Re: Fixes for nforce2 hard lockup, apic, io-apic, udma133 covered
From: Ian Kumlien
Date: Sun Dec 14 2003 - 08:53:30 EST
Resend due to no CC...
On Sun, 2003-12-14 at 14:11, Ross Dickson wrote:
> I had a lockup on a boot so I am trying a bit more conservative with
>
> 1000UL and ndelay(400)
>
> I don't think anyone should try any less than this but hey?
>
> This gives my system a safety margin of 16 apic counts.
> The v1 patch on my system typically gave a safety delay of 13 counts.
>
> The performance hit with the v2 is still less than with the v1.
> With v2 additional delay would only have been present on 2 out of 10
> instead of 10 out of 10 with v1.
13h 18min here now, with 800UL 100ns
Works like a charm. It seems like we are just avoiding a timer race with
some values... ie more delay might not solve the problem.
--
Ian Kumlien <pomac () vapor ! com> -- http://pomac.netswarm.net
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