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Re: [Xen-devel] Proposed XENMEM_claim_pages hypercall: Analysis of problem and alternate solutions

On Jan 14, 2013, at 11:00 AM, George Dunlap <george.dunlap@xxxxxxxxxxxxx> wrote:

> On 11/01/13 19:08, Konrad Rzeszutek Wilk wrote:
>>>> The xenshared daemon.
>>> That's not in the tree. Unbeknownst to me. Would appreciate to know more. 
>>> Or is it a symbolic placeholder in this conversation?
>> OK, I am confused then. I thought there was now an daemon that would take
>> care of the PoD and swapping? Perhaps its called something else?
> FYI PoD at the moment is all handled within the hypervisor.  There was 
> discussion of extending the swap daemon (sorry, also don't know the official 
> name off the top of my head) to handle PoD, since PoD is essentially a 
> degenerate case of swapping, but it hasn't happened yet.  In any case it will 
> need to be tested first, since it may cause boot time for pre-ballooned 
> guests to slow down unacceptably.

Not necessarily involve the swapping daemon. I thought the idea was to have PoD 
use the existing hypervisor paging infrastructure. We could add a p2m type 
(paged_out_zero) and then no need to actively involve a swapping daemon during 


> -George

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