Virtio: Add virtio block irq suppress

The flag in avail descriptor supplies irq suppress, it could reduce irq
injection from device, so many redundant interrupts could be removed
from guest, then improve guest performance.

BUG=None
TEST=run fio read and fio write in guest

Change-Id: I68789d8ca24d0e84d0b446db65057f4da2fac56f
Signed-off-by: Xiong Zhang <xiong.y.zhang@intel.corp-partner.google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/2008339
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/devices/src/virtio/block.rs b/devices/src/virtio/block.rs
index 65be6d5..1e9c63e 100644
--- a/devices/src/virtio/block.rs
+++ b/devices/src/virtio/block.rs
@@ -325,7 +325,7 @@ impl Worker {
             };
 
             queue.add_used(&self.mem, desc_index, len as u32);
-            self.interrupt.signal_used_queue(queue.vector);
+            queue.trigger_interrupt(&self.mem, &self.interrupt);
             queue.set_notify(&self.mem, true);
         }
     }