Changeset 83507 in vbox for trunk

Timestamp:

Apr 1, 2020 3:43:20 PM (5 years ago)

Author:

vboxsync

Message:

Comment.

File:

• trunk/src/VBox/Devices/Graphics/DevVGA-SVGA.cpp (modified) (1 diff)

trunk/src/VBox/Devices/Graphics/DevVGA-SVGA.cpp

@@ -1862 +1862 @@
 #if defined(IN_RING3) || defined(IN_RING0)
                 Log(("SVGA_REG_SYNC: SVGA_FIFO_BUSY=%d\n", pThisCC->svga.pau32FIFO[SVGA_FIFO_BUSY]));
+                /*
+                 * The VMSVGA_BUSY_F_EMT_FORCE flag makes sure we will check if the FIFO is empty
+                 * at least once; VMSVGA_BUSY_F_FIFO alone does not ensure that.
+                 */
                 ASMAtomicWriteU32(&pThis->svga.fBusy, VMSVGA_BUSY_F_EMT_FORCE | VMSVGA_BUSY_F_FIFO);
                 if (VMSVGA_IS_VALID_FIFO_REG(SVGA_FIFO_BUSY, pThisCC->svga.pau32FIFO[SVGA_FIFO_MIN]))