Re: [Xen-devel] grant table size

[Jan Beulich <jbeulich@xxxxxxxx>]

On 20.11.2019 11:49,  Durrant, Paul  wrote:
>> From: Roger Pau Monné <roger.pau@xxxxxxxxxx>
>> Sent: 20 November 2019 11:06
>>
>> Do you have in mind to signal this somehow to guests, or the
>> expectation is that the guest will have to poll GNTTABOP_query_size
>> and at some point the size will increase?
> 
> I don't think the guest need care until its grant table grows to the
> max. At that point, rather than giving up, the guest would re-query
> the max value to see if there is now more headroom and then re-size
> its internal data structures accordingly.

If we consider dynamic adjustments, what about shrinking of the
table? This would of course require some form of guest consent,
but it would be nice if the option would at least be accounted
for when working out how all of this should behave, even if the
case may not get handled right now.

Jan

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel