Re: [Xen-devel] [RFC][PATCH] Basic support for page offline

[Frank van der Linden <Frank.Vanderlinden@xxxxxxx>]

Jiang, Yunhong wrote:
> Frank, can you please elabrate what's the status mean? What's the usage by Solaris FMA code? Do you mean how the page is used (i.e. information in the page_info->count_info)? 
>
> As for the ownership of the page, I'm not sure if we can do that without trying 
> online/offline it, since the page may be assigned to another guest after the 
> query if it is not marked offline-pending (mark offline pending make sure it 
> will not be used anymore if freed).
The usage is pretty simple: there is an interface to:

* retire a page
* unretire a page
* check on the status

The status doesn't have to have much info. The Solaris interface returns 
one of:
* retired
* not retired
* pending
* invalid page

I understand that the owner may be harder to return, and it isn't really 
important, so it doesn't matter if that information is not available 
from the hypercall.
- Frank

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