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Re: [Xen-devel] pv_ops dom0 kernel failure with ata_piix / irq problems

To: Pasi Kärkkäinen <pasik@xxxxxx>
Subject: Re: [Xen-devel] pv_ops dom0 kernel failure with ata_piix / irq problems
From: Christophe Saout <christophe@xxxxxxxx>
Date: 2009年1月25日 00:10:27 +0100
Cc: Todd Deshane <deshantm@xxxxxxxxx>, Jeremy Fitzhardinge <jeremy@xxxxxxxx>, Andrew Lyon <andrew.lyon@xxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx
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Hi Pasi,
> ata_port_alloc: ENTER
> __ata_port_freeze: ata4294967295 port frozen
>
> I guess I have to start reading the source to figure out why the port is
> 'frozen'.. 
Just checked. It is frozen after a bad error that put the port into a
bad state (in order to avoid corruption or any sort of mess I guess).
It is unfrozen after a successful reset.
The code initially freezes a port before probing. That's why it doesn't
even have an id assigned (hence -1 or 4294967295 if you interpret is as
unsigned). Haven't checked, but this message should also appear if
everything works as it should. It starts the probing only after that
message.
So I guess we need a better lead. Would start debugging myself, but I
don't have time...
Cheers,
 Christophe
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