linux-kernel - Re: [PATCH 0/7] KVM: Kernel-based Virtual Machine

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Date:	Sun, 22 Oct 2006 20:00:16 +0200
From:	Avi Kivity <avi@...ranet.com>
To:	Christoph Hellwig <hch@...radead.org>,
	Avi Kivity <avi@...ranet.com>, Arnd Bergmann <arnd@...db.de>,
	Muli Ben-Yehuda <muli@...ibm.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Anthony Liguori <aliguori@...ibm.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [PATCH 0/7] KVM: Kernel-based Virtual Machine

Christoph Hellwig wrote:
> On Sun, Oct 22, 2006 at 07:01:29PM +0200, Avi Kivity wrote:
>   
>>> What is the point of 32 bit hosts anyway? Isn't this only available
>>> on x86_64 type CPUs in the first place?
>>>  
>>>       
>> No, 32-bit hosts are fully supported (except a 32-bit host can't run a 
>> 32-bit guest).
>>     
>
> Again, what's the point?  All cpus shipped by Intel and AMD that have
> hardware virtualization extensions also support the 64bit mode.  Given
> that I don't see any point for supporting a 32bit host.
>   

Existing installations?

Dropping 32-bit host support would certainly kill a lot of #ifdefs and 
reduce the amount of testing needed.  It would also force me to upgrade 
my home machine.

-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.

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