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