On Wed, Nov 25, 2015 at 06:20:20PM +0300, Andrey Smetanin wrote:
> The SynIC message protocol mandates that the message slot is claimed
> by atomically setting message type to something other than HVMSG_NONE.
> If another message is to be delivered while the slot is still busy,
> message pending flag is asserted to indicate to the guest that the
> hypervisor wants to be notified when the slot is released.
> To make sure the protocol works regardless of where the message
> sources are (kernel or userspace), clear the pending flag on SINT ACK
> notification, and let the message sources compete for the slot again.
> Signed-off-by: Andrey Smetanin <asmeta...@virtuozzo.com>
> CC: Gleb Natapov <g...@kernel.org>
> CC: Paolo Bonzini <pbonz...@redhat.com>
> CC: "K. Y. Srinivasan" <k...@microsoft.com>
> CC: Haiyang Zhang <haiya...@microsoft.com>
> CC: Vitaly Kuznetsov <vkuzn...@redhat.com>
> CC: Roman Kagan <rka...@virtuozzo.com>
> CC: Denis V. Lunev <d...@openvz.org>
> CC: qemu-de...@nongnu.org

Reviewed-by: Roman Kagan <rka...@virtuozzo.com>

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