Changeset 19957 in vbox for trunk/src/VBox/HostDrivers/Support/win

Timestamp:

May 24, 2009 2:47:43 AM (16 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

47659

Message:

VMM,SUPDrv-win,Config.kmk: VBOX_WITH_VMMR0_DISABLE_PREEMPTION

File:

• trunk/src/VBox/HostDrivers/Support/win/SUPDrv-win.cpp (modified) (2 diffs)

trunk/src/VBox/HostDrivers/Support/win/SUPDrv-win.cpp

@@ -322 +322 @@
         ||  ulCmd == SUP_IOCTL_FAST_DO_NOP)
     {
-        /* Raise the IRQL to DISPATCH_LEVEl to prevent Windows from rescheduling us to another CPU/core. */
+#ifdef VBOX_WITH_VMMR0_DISABLE_PREEMPTION
+        int rc = supdrvIOCtlFast(ulCmd, (unsigned)(uintptr_t)pIrp->UserBuffer /* VMCPU id */, pDevExt, pSession);
+#else
+        /* Raise the IRQL to DISPATCH_LEVEL to prevent Windows from rescheduling us to another CPU/core. */
         Assert(KeGetCurrentIrql() <= DISPATCH_LEVEL);
         KIRQL oldIrql;
@@ -328 +331 @@
         int rc = supdrvIOCtlFast(ulCmd, (unsigned)(uintptr_t)pIrp->UserBuffer /* VMCPU id */, pDevExt, pSession);
         KeLowerIrql(oldIrql);
+#endif
 
         /* Complete the I/O request. */