Changeset 20217 in vbox for trunk/src/VBox/Devices

Timestamp:

Jun 3, 2009 8:18:38 AM (16 years ago)

Author:

vboxsync

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

48059

Message:

More comments

File:

• trunk/src/VBox/Devices/PC/DevACPI.cpp (modified) (1 diff)

trunk/src/VBox/Devices/PC/DevACPI.cpp ¶

@@ -1852 +1852 @@
                                 N_("Configuration error: Failed to read \"ShowCpu\""));
 
-    /* Always show the CPU leafs when we have multiple VCPUs or when the IO-APIC is enabled. */
+    /* Always show the CPU leafs when we have multiple VCPUs or when the IO-APIC is enabled. 
+     * The Windows SMP kernel needs a CPU leaf or else its idle loop will burn cpu cycles; the 
+     * intelppm driver refuses to register an idle state handler.
+     */
     if (    s->cCpus > 1
         ||  s->u8UseIOApic)