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

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Message-ID: <453BAD66.5000406@qumranet.com>
Date:	Sun, 22 Oct 2006 19:41:58 +0200
From:	Avi Kivity <avi@...ranet.com>
To:	Arnd Bergmann <arnd@...db.de>
CC:	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

Arnd Bergmann wrote:
> On Sunday 22 October 2006 19:01, Avi Kivity wrote:
>   
>>> While we don't have it yet, we're thinking about adding a sputop
>>> or something similar that shows the utilization of spus. You don't
>>> need that one, since get exactly that with the regular top, but you
>>> might want to have a tool that prints statistics about how often
>>> your guests drop out of the virtualisation mode, or the number
>>> of interrupts delivered to them.
>>>
>>>  
>>>       
>> We have a debugfs interface and a kvm_stat script which shows exactly
>> that (including a breakdown of the reasons for the exit).
>>     
>
> Ok, good. But with your own file system, you wouldn't need debugfs
> any more and have all information about a guest in one place.
>   

One last thing: permissions.  The /dev/kvm model allows permissions to 
be controlled using standard unix access methods.  How do you control 
access to spufs?

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

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