Re: [PATCH RT 0/6] lockstat measurement extensions
From: Bill Huey (hui) <hidden>
Date: 2008-03-14 00:40:27
Also in:
lkml
Sorry missing the patch. At Thomas's urging, this is inlined:
--- linux-2.6.24/kernel/sched.c 2008-02-25 15:32:05.000000000 -0800
+++ linux-2.6.24.working/kernel/sched.c 2008-03-13 13:53:24.000000000 -0700@@ -1175,6 +1175,20 @@ return cpu_curr(task_cpu(p)) == p; } +int task_spinnable(struct task_struct *p) +{ +/* + * The use of task_curr can crash the system since the struct
thread_info seems
+ * to disappear when dereferenced arbitrarily, so becareful.
+ */
+#ifdef CONFIG_SMP
+ if (p && p->se.on_rq && task_curr(p))
+ return 1;
+#else
+ return 0;
+#endif
+}
+
/* Used instead of source_load when we know the type == 0 */
unsigned long weighted_cpuload(const int cpu)
{@@ -1239,6 +1253,11 @@ *new_cfsrq = cpu_cfs_rq(old_cfsrq, new_cpu); u64 clock_offset; +//--billh +// if (old_cpu >= NR_CPUS) +// panic("bogus cpu id %u\n", old_cpu); +// +// clock_offset = old_rq->clock - new_rq->clock; #ifdef CONFIG_SCHEDSTATS