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

["Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx>]

Frank.Vanderlinden@xxxxxxx <mailto:Frank.Vanderlinden@xxxxxxx> wrote:
> Would it be possible to add page status query to the hypercalls? E.g.
> return the status and owner for just one page, without trying to on/offline

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).

-- Yunhong Jiang

> it? 
> 
> The same goes for the CPU hotplug code, but that's another issue.
> 
> The Solaris FMA code likes to have the option of querying the status, so
> that's why we'd like to have such an option.
> 
> - Frank
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