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Re: [Xen-devel][PATCH 00/02] Extend max vcpu number for HVM guest

On 29/10/2009 15:24, "Xu, Dongxiao" <dongxiao.xu@xxxxxxxxx> wrote:

> Keir, 
> I did a quick try, and the patch works. Thanks!
> Since the ioreq page is limited to one page, so now i386 hypervisor could also
> benefit from this patch. Therefore maybe the original patch comments is no
> longer proper for the C/S 20389. :)

Hm, yes it probably could, since the limit of 32 VCPUs for PV guests on i386
is because of lack of space for guest GDT/LDT mappings, which is not an
issue for HVM. But frankly it's not worth chasing this. Any large
HVM-capable system is going to support 64-bit operation, and therefore the
right thing to do is install the x86_64 hypervisor. Personally I consider
the i386 hypervisor obsolescent.

 -- Keir

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