[Xen-devel] Re: [PATCH] Support swap a page from user space tools -- Was RE: [RFC][PATCH] Basic support for page offline

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 19/03/2009 14:26, "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx> wrote:

>> Well, why is the existing hypercall not okay by itself? Why
>> can you not take
>> an arbitrary new mfn and you feel you have to specify it from the tools
>> instead? 
> 
> It is ok for us to use an arbitrary new mfn, and then do the update_entry. But
> what happen if this process failed and we want to turn back to the old page?
> We still need this mechanism at that situation.

If what failed? The update_entry? How could that happen?

 -- Keir



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