Changeset 72640 in vbox

Timestamp:

Jun 21, 2018 2:45:13 PM (7 years ago)

Author:

vboxsync

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

123146

Message:

RTThreadPreemptIsPossible/linux: CONFIG_PREEMPT_VOLUNTARY does not qualify as proper preemption as it requires kernel code to be called.

File:

• trunk/src/VBox/Runtime/r0drv/linux/thread-r0drv-linux.c (modified) (1 diff)

trunk/src/VBox/Runtime/r0drv/linux/thread-r0drv-linux.c

@@ -165 +165 @@
 RTDECL(bool) RTThreadPreemptIsPossible(void)
 {
-    /** @todo r=ramshankar: What about CONFIG_PREEMPT_VOLUNTARY? That can preempt
-     *        too but does so in voluntarily in explicit preemption points. */
-#ifdef CONFIG_PREEMPT
-    return true;    /* yes, kernel preemption is possible. */
-#else
-    return false;   /* no kernel preemption */
+#ifdef CONFIG_PREEMPT
+    return true;    /* Yes, kernel preemption is possible. */
+#else
+    return false;   /* No kernel preemption (or CONFIG_PREEMPT_VOLUNTARY). */
 #endif
 }