Re: [Xen-ia64-devel] [PATCH] per vcpu vhpt

[Isaku Yamahata <yamahata@xxxxxxxxxxxxx>]

On Mon, Oct 09, 2006 at 05:59:46PM +0800, Xu, Anthony wrote:
> >
> >That makes sense.
> >The option 1 is difficult because the vhpt size(currently 64KB and this
> >might be increased in future) is smaller than xen granule size (16MB)
> and
> >non-current vcpu's case must be handled.
> I don't see any issue here, if we use option1, we use identity mapping
> for VHPT, and so we can use 16 MB TR mapping, of cause, 64KB VHPT is
> covered by this 16M TR.

In fact I had such a patch for the very early version of
the pervcpu vhpt patch.
But I discarded it for some reason. I don't remember clearly why.
Probably I wanted to avoid introducing an implicit dependency
and increasing vcpu context switch overhead.

-- 
yamahata

_______________________________________________
Xen-ia64-devel mailing list
Xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-ia64-devel