Re: [Xen-devel] [PATCH 0/5] xen: better grant v2 support

[Juergen Gross <jgross@xxxxxxxx>]

On 23/08/17 11:43, Jan Beulich wrote:
>>>> On 23.08.17 at 11:23, <jgross@xxxxxxxx> wrote:
>> On 23/08/17 10:47, Paul Durrant wrote:
>>> Making a the number of grant frames a per-vm-configurable quantity would 
>> seem like a reasonable first step. I'm not convinced of the need for 
>> separate 
>> v1 and v2 limits if this were the case.
>>
>> Really? I don't think so. I believe the default should be to allow the
>> same number of grants regardless whether they are v1 or v2. Having to
>> modify the guest config to achieve this isn't good practice IMO.
> 
> I'm not convinced one is significantly better than the other. Both
> have their upsides and downsides.

Again: the whole series is meant to not make a guest having to choose
whether it can either use the amount of grants it is needing or it can
run on a host with more than 16TB of memory.

And I believe the default should be not having to use special command
line parameters or guest config settings to achieve this.


Juergen

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