Changeset 49579 in vbox

Timestamp:

Nov 20, 2013 12:08:05 PM (11 years ago)

Author:

vboxsync

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

90778

Message:

VMM/HMVMXR0: Don't cause unnecessary host-state update in case we're not swapping MSRs.

File:

• trunk/src/VBox/VMM/VMMR0/HMVMXR0.cpp (modified) (1 diff)

trunk/src/VBox/VMM/VMMR0/HMVMXR0.cpp

@@ -7900 +7900 @@
         AssertRC(rc);
         STAM_COUNTER_INC(&pVCpu->hm.s.StatPreemptSaveHostState);
+
+        /*
+         * Prevent unnecessary host-state updates in case fUpdatedHostMsrs remains false 
+         * throughout execution (e.g. if we are not swapping any MSRs)
+         */
+        pVCpu->hm.s.vmx.fUpdatedHostMsrs = true;
     }
     Assert(!VMCPU_HMCF_IS_PENDING(pVCpu, HM_CHANGED_HOST_CONTEXT));