Re: [PATCH v3] KVM: Introduce direct MSI message injection for in-kernel irqchips

[Jan Kiszka <jan.kiszka@xxxxxxxxxxx>]

On 2012-03-29 18:46, Michael S. Tsirkin wrote:
> On Thu, Mar 29, 2012 at 06:15:41PM +0200, Jan Kiszka wrote:
>> Currently, MSI messages can only be injected to in-kernel irqchips by
>> defining a corresponding IRQ route for each message. This is not only
>> unhandy if the MSI messages are generated "on the fly" by user space,
>> IRQ routes are a limited resource that user space as to manage
> 
> 
> s/as/has/

Yeah, should be fixable on merge.

> 
>> carefully.
>>
>> By providing a direct injection path, we can both avoid using up limited
>> resources and simplify the necessary steps for user land.
>>
>> Signed-off-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
> 
> Further, we can ensure better, deterministic worst-case performance
> for real-time guests with large number of vectors.

Good to hear that this is on your radar. :)

> 
> Acked-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
> 

Thanks,
Jan

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Corporate Competence Center Embedded Linux
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