[Qemu-devel] [PATCH] qxl: stop dirty loging when not in vga mode

[Alon Levy <alevy@redhat.com>]

Tested with linux guest. Not sure how to check actual performance affect
of this. Checked with the previously send traceevent that the kvm ioctl
to start/stop dirty logging is being called.
(KVM_SET_USER_MEMORY_REGION).

Signed-off-by: Alon Levy <alevy@redhat.com>
---
 hw/qxl.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/hw/qxl.c b/hw/qxl.c
index 8ebab6f..cf21cbb 100644
--- a/hw/qxl.c
+++ b/hw/qxl.c
@@ -933,6 +933,7 @@ static void qxl_enter_vga_mode(PCIQXLDevice *d)
     qemu_spice_create_host_primary(&d->ssd);
     d->mode = QXL_MODE_VGA;
     memset(&d->ssd.dirty, 0, sizeof(d->ssd.dirty));
+    vga_dirty_log_start(&d->vga);
 }
 
 static void qxl_exit_vga_mode(PCIQXLDevice *d)
@@ -941,6 +942,7 @@ static void qxl_exit_vga_mode(PCIQXLDevice *d)
         return;
     }
     trace_qxl_exit_vga_mode(d->id);
+    vga_dirty_log_stop(&d->vga);
     qxl_destroy_primary(d, QXL_SYNC);
 }
 
-- 
1.7.10.1