PERFORCE change 104291 for review

[Chris Jones]

http://perforce.freebsd.org/chv.cgi?CH=104291

Change 104291 by cdjones at cdjones_meanook on 2006/08/16 20:47:17

	Fix crash in schedcpu.  
	No, Virginia, when you try writing to a NULL value (i.e. when a process isn't jailed), good things do not happen.

Affected files ...

.. //depot/projects/soc2006/cdjones_jail/src/sys/kern/sched_hier.c#11 edit

Differences ...

==== //depot/projects/soc2006/cdjones_jail/src/sys/kern/sched_hier.c#11 (text+ko) ====

@@ -541,7 +541,9 @@
 			if (kg->kg_slptime > 1)
 				continue;
 			kg->kg_estcpu = decay_cpu(loadfac, kg->kg_estcpu);
-			kg->kg_proc->p_ucred->cr_prison->pr_estcpu += kg->kg_estcpu;
+			if (kg->kg_proc->p_ucred->cr_prison)
+				kg->kg_proc->p_ucred->cr_prison->pr_estcpu += 
+				  kg->kg_estcpu;
 		      	resetpriority(kg);
 			FOREACH_THREAD_IN_GROUP(kg, td) {
 				resetpriority_thread(td, kg);