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Re: [Xen-devel] Shadow Page Tables for PV Guest
| To: | zhujun <zhujun@xxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] Shadow Page Tables for PV Guest |
| From: | Gianluca Guida <gianluca.guida@xxxxxxxxxxxxx> |
| Date: | Sun, 21 Jun 2009 15:27:55 +0200 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Sun, 21 Jun 2009 06:28:22 -0700 |
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On Sat, Jun 20, 2009 at 2:47 PM, zhujun<zhujun@xxxxxxxxxxxxxx> wrote:
> Does shadow page table uses oos optimization for PV guest? In the
> sh_unsync() function, it is only hvm that can put a L1 page table into oos
> list. Why?
The OOS was meant as a HVM optimization (in the specific targeting
Windows guest). Shadow pagetables are currently used by PV guests only
for live migration, and in that context the OOS would just be an
unneeded complexity.
Gianluca
--
It was a type of people I did not know, I found them very strange and
they did not inspire confidence at all. Later I learned that I had been
introduced to electronic engineers.
E. W. Dijkstra
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