Re: performance with guests running 2.4 kernels (specifically RHEL3)

David S. Ahern
2008-05-13T03:49:22Z

That does the trick with kscand.

Do you have recommendations for clock source settings? For example in my
test case for this patch the guest gained 73 seconds (ahead of real
time) after only 3 hours, 5 min of uptime.

thanks,

david

Avi Kivity wrote:
> Avi Kivity wrote:
>> Avi Kivity wrote:
>>>
>>> I asked fo this thinking bypass_guest_pf may help show more
>>> information. But thinking a bit more, it will not.
>>>
>>> I think I do know what the problem is. I will try it out. Is there
>>> a free clone (like centos) available somewhere?
>>
>> This patch tracks down emulated accesses to speculated ptes and marks
>> them as accessed, preventing the flooding on centos-3.1.
>> Unfortunately it also causes a host oops midway through the boot process.
>>
>> I believe the oops is merely exposed by the patch, not caused by it.
>>
>
> It was caused by the patch, please try the updated one attached.
>
>
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