Re: [Xen-devel] [PATCH] xen/grant-table: Force to use v1 of grants.

David Vrabel
2014-01-02T14:54:50Z

On 31/12/13 15:15, Konrad Rzeszutek Wilk wrote:
> We have the framework to use v2, but there are no backends that
> actually use it. The end result is that on PV we use v2 grants
> and on PVHVM v1. The v1 has a capacity of 512 grants per page while
> the v2 has 256 grants per page. This means we lose about 50%
> capacity - and if we want more than 16 VIFs (each VIF takes
> 512 grants), then we are hitting the max per guest of 32.
>
> Oracle-bug: 16039922
> CC: annie.li@oracle.com
> CC: msw@amazon.com
> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

Reviewed-by: David Vrabel <david.vrabel@citrix.com>

What does v2 add anyway? Do we want to remove all v2 related code or are
we expecting to make use of it in the near future?

David