[PATCH] Small schedule() optimization
Andreas Mohr [Mon, 27 Mar 2006 09:15:20 +0000 (01:15 -0800)]
small schedule() microoptimization.

Signed-off-by: Andreas Mohr <andi@lisas.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

kernel/sched.c

index dc599c8..a96a05d 100644 (file)
@@ -2879,13 +2879,11 @@ asmlinkage void __sched schedule(void)
         * schedule() atomically, we ignore that path for now.
         * Otherwise, whine if we are scheduling when we should not be.
         */
-       if (likely(!current->exit_state)) {
-               if (unlikely(in_atomic())) {
-                       printk(KERN_ERR "BUG: scheduling while atomic: "
-                               "%s/0x%08x/%d\n",
-                               current->comm, preempt_count(), current->pid);
-                       dump_stack();
-               }
+       if (unlikely(in_atomic() && !current->exit_state)) {
+               printk(KERN_ERR "BUG: scheduling while atomic: "
+                       "%s/0x%08x/%d\n",
+                       current->comm, preempt_count(), current->pid);
+               dump_stack();
        }
        profile_hit(SCHED_PROFILING, __builtin_return_address(0));