Re: [PATCH] gnttab: maptrack handle shortage is not IOMMU related

[Julien Grall <julien@xxxxxxx>]

Hi Jan,

On 30/08/2021 15:27, Jan Beulich wrote:
> Both comment and message string associated with GNTST_no_device_space
> suggest a connection to the IOMMU. A lack of maptrack handles has
> nothing to do with that; it's unclear to me why commit 6213b696ba65
> ("Grant-table interface redone") introduced it this way. Introduce a
> new error indicator.
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
> ---
> Or should this be a more specific one, e.g. GNTST_no_mt_handle? If not,
> I would intend to also use GNTST_no_space for -ENOMEM like situations.
I guess the guest could use GNTSTS_no_mt_handle to reduce the number of 
persistent mappings (if there are any).
Although, I am not sure how involved it would be in OS like Linux.

Anyway, the new error status is better than the previous one. So I am 
happy with either solutions:
Acked-by: Julien Grall <jgrall@xxxxxxxxxx>

Cheers,

--
Julien Grall