diff --git a/glamor/glamor.c b/glamor/glamor.c
index f15b5a18a..0cbc89ee4 100644
--- a/glamor/glamor.c
+++ b/glamor/glamor.c
@@ -271,9 +271,7 @@ void
 glamor_block_handler(ScreenPtr screen)
 {
     glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
-
-    glamor_make_current(glamor_priv);
-    glFlush();
+    glamor_flush(glamor_priv);
 }
 
 static void
@@ -281,8 +279,7 @@ _glamor_block_handler(ScreenPtr screen, void *timeout)
 {
     glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
 
-    glamor_make_current(glamor_priv);
-    glFlush();
+    glamor_flush(glamor_priv);
 
     screen->BlockHandler = glamor_priv->saved_procs.block_handler;
     screen->BlockHandler(screen, timeout);
diff --git a/glamor/glamor_priv.h b/glamor/glamor_priv.h
index da20bc5aa..1032b880b 100644
--- a/glamor/glamor_priv.h
+++ b/glamor/glamor_priv.h
@@ -314,6 +314,7 @@ typedef struct glamor_screen_private {
     Bool suppress_gl_out_of_memory_logging;
     Bool logged_any_fbo_allocation_failure;
     Bool logged_any_pbo_allocation_failure;
+    Bool dirty;
 
     /* xv */
     glamor_program xv_prog;
diff --git a/glamor/glamor_sync.c b/glamor/glamor_sync.c
index 907e0c613..3f98be400 100644
--- a/glamor/glamor_sync.c
+++ b/glamor/glamor_sync.c
@@ -52,8 +52,7 @@ glamor_sync_fence_set_triggered (SyncFence *fence)
 	struct glamor_sync_fence *glamor_fence = glamor_get_sync_fence(fence);
 
 	/* Flush pending rendering operations */
-        glamor_make_current(glamor);
-        glFlush();
+	glamor_flush(glamor);
 
 	fence->funcs.SetTriggered = glamor_fence->set_triggered;
 	fence->funcs.SetTriggered(fence);
diff --git a/glamor/glamor_utils.h b/glamor/glamor_utils.h
index 93a933eed..bee48d989 100644
--- a/glamor/glamor_utils.h
+++ b/glamor/glamor_utils.h
@@ -672,6 +672,17 @@ glamor_make_current(glamor_screen_private *glamor_priv)
         lastGLContext = glamor_priv->ctx.ctx;
         glamor_priv->ctx.make_current(&glamor_priv->ctx);
     }
+    glamor_priv->dirty = TRUE;
+}
+
+static inline void
+glamor_flush(glamor_screen_private *glamor_priv)
+{
+    if (glamor_priv->dirty) {
+        glamor_make_current(glamor_priv);
+        glFlush();
+        glamor_priv->dirty = FALSE;
+    }
 }
 
 static inline BoxRec