Re: [Xen-devel] [PATCH 1 of 4] Prevent low values of max_pages for domains doing sharing or paging

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 16.02.12 at 15:45, "Andres Lagar-Cavilla" <andres@xxxxxxxxxxxxxxxx> 
>>> wrote:
> But I've seen squeezed set criminally low max_pages value (i.e. 256).
> Granted, this is squeezed's problem, but shouldn't some sanity checking be
> wired into the hypervisor? Why should we even allow max_pages < tot_pages?

The only lower boundary that the hypervisor could (perhaps should)
enforce is that of not being able to guarantee guest forward progress:
On x86, up to 2 text pages plus up to 4 data pages, times the number
of page table levels (i.e. 24 pages on 64-bit).

Jan


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