linux-kernel - Re: 2.6.{26.2,27-rc} oops on virtualbox

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Message-ID: <48AF2ABD.9070100@zytor.com>
Date:	Fri, 22 Aug 2008 14:08:13 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	"Luiz Fernando N. Capitulino" <lcapitulino@...driva.com.br>
CC:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org
Subject: Re: 2.6.{26.2,27-rc} oops on virtualbox

Luiz Fernando N. Capitulino wrote:
> 
>  I have asked Mandriva and Ubuntu users to test this and all of
> them so far are saying that noreplace-paravirt works.
> 
>  It makes the system slower, but it works.
> 

Yes, the big issue is exactly what VirtualBox screws up in this matter, 
how to detect it, and how to work around it.

It's pretty clear it's a VirtualBox f*ckup at this point, but the 
failure mechanism isn't at all obvious and so far the workaround is elusive.

I'm strongly suspect this is a VirtualBox tcache management failure, but 
that doesn't help the situation without knowing how it happens.

	-hpa

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