Re: [Xen-devel] [PATCH v2 00/10] Per vcpu vm_event channels

[Tamas K Lengyel <tamas@xxxxxxxxxxxxx>]

On Tue, Jul 16, 2019 at 11:06 AM Petre Pircalabu
<ppircalabu@xxxxxxxxxxxxxxx> wrote:
>
> This patchset adds a new mechanism of sending synchronous vm_event
> requests and handling vm_event responses without using a ring.
> As each synchronous request pauses the vcpu until the corresponding
> response is handled, it can be stored in a slotted memory buffer
> (one per vcpu) shared between the hypervisor and the controlling domain.
>
> The main advantages of this approach are:
> * the ability to dynamicaly allocate the necessary memory used to hold
> the requests/responses (the size of vm_event_request_t/vm_event_response_t
> can grow unrestricted by the ring's one page limitation)
> * the ring's waitqueue logic is unnecessary in this case because the
> vcpu sending the request is blocked until a response is received.

Could you please push a git branch for this somewhere?

Thanks,
Tamas

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