Re: [Xen-devel] [PATCH RFC v2 1/4] x86/mm: Shadow and p2m changes for PV mem_access

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 03.09.14 at 20:50, <aravindp@xxxxxxxxx> wrote:
>> > Is the page_list the only place that will tell me the range of pages that
>>> belong to a PV guest?
>>
>>Yes. No upper bound on the PFN space is being tracked.
> 
> OK, in that case the only thing I can think of is to set a max memory limit 
> for PV domains that an access listener can attach to so that the hypercall 
> preemption / continuation is not required. In addition we could add a kernel 
> command line parameter that overrides this and document that this could cause 
> denial of service issues when used. 

Did you check whether the suggested list shuffling would require
(massive) changes elsewhere (other than in domain cleanup)?

Jan


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