Re: [PATCH 9/24] Implement VMCLEAR

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On Thu, Aug 05, 2010, Avi Kivity wrote about "Re: [PATCH 9/24] Implement VMCLEAR":
> As far as the processor is concerned, there is no end to physical 
> memory.  The VMCLEAR will write some stuff out, and the chipset will 
> throw it away.

So isn't what you're saying that for accurate VMCLEAR emulation, I should
simply ignore this error and have VMCLEAR do nothing in this case?

>  However, eventually the guest will crash and burn, 
> better to take it out in a controlled way.

Isn't it concievable that some poorly-written hypervisor actually VMCLEARs
something beyond available memory, and doesn't crash because it never tries
to actually use that memory later? Do you think it's a good idea to kill
the guest immediately, in anticipation of a crash that will most likely come
later?

Thanks,
Nadav.

-- 
Nadav Har'El                        |        Thursday, Aug  5 2010, 25 Av 5770
nyh@xxxxxxxxxxxxxxxxxxx             |-----------------------------------------
Phone +972-523-790466, ICQ 13349191 |Tact is the art of making a point without
http://nadav.harel.org.il           |making an enemy.
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