svcrpc: fix handling of garbage args

[safe/jmp/linux-2.6] / kernel / sched_stats.h

diff --git a/kernel/sched_stats.h b/kernel/sched_stats.h
index 1c08484..80179ef 100644 (file)
--- a/kernel/sched_stats.h
+++ b/kernel/sched_stats.h
@@ -9,6 +9,11 @@
 static int show_schedstat(struct seq_file *seq, void *v)
 {
        int cpu;
+       int mask_len = NR_CPUS/32 * 9;
+       char *mask_str = kmalloc(mask_len, GFP_KERNEL);
+
+       if (mask_str == NULL)
+               return -ENOMEM;
 
        seq_printf(seq, "version %d\n", SCHEDSTAT_VERSION);
        seq_printf(seq, "timestamp %lu\n", jiffies);
@@ -21,7 +26,7 @@ static int show_schedstat(struct seq_file *seq, void *v)
 
                /* runqueue-specific stats */
                seq_printf(seq,
-                   "cpu%d %lu %lu %lu %lu %lu %lu %lu %lu %lu %llu %llu %lu",
+                   "cpu%d %u %u %u %u %u %u %u %u %u %llu %llu %lu",
                    cpu, rq->yld_both_empty,
                    rq->yld_act_empty, rq->yld_exp_empty, rq->yld_count,
                    rq->sched_switch, rq->sched_count, rq->sched_goidle,
@@ -36,14 +41,12 @@ static int show_schedstat(struct seq_file *seq, void *v)
                preempt_disable();
                for_each_domain(cpu, sd) {
                        enum cpu_idle_type itype;
-                       char mask_str[NR_CPUS];
 
-                       cpumask_scnprintf(mask_str, NR_CPUS, sd->span);
+                       cpumask_scnprintf(mask_str, mask_len, sd->span);
                        seq_printf(seq, "domain%d %s", dcount++, mask_str);
                        for (itype = CPU_IDLE; itype < CPU_MAX_IDLE_TYPES;
                                        itype++) {
-                               seq_printf(seq, " %lu %lu %lu %lu %lu %lu %lu "
-                                               "%lu",
+                               seq_printf(seq, " %u %u %u %u %u %u %u %u",
                                    sd->lb_count[itype],
                                    sd->lb_balanced[itype],
                                    sd->lb_failed[itype],
@@ -53,8 +56,8 @@ static int show_schedstat(struct seq_file *seq, void *v)
                                    sd->lb_nobusyq[itype],
                                    sd->lb_nobusyg[itype]);
                        }
-                       seq_printf(seq, " %lu %lu %lu %lu %lu %lu %lu %lu %lu"
-                           " %lu %lu %lu\n",
+                       seq_printf(seq,
+                                  " %u %u %u %u %u %u %u %u %u %u %u %u\n",
                            sd->alb_count, sd->alb_failed, sd->alb_pushed,
                            sd->sbe_count, sd->sbe_balanced, sd->sbe_pushed,
                            sd->sbf_count, sd->sbf_balanced, sd->sbf_pushed,
@@ -64,6 +67,7 @@ static int show_schedstat(struct seq_file *seq, void *v)
                preempt_enable();
 #endif
        }
+       kfree(mask_str);
        return 0;
 }
 
@@ -129,7 +133,7 @@ rq_sched_info_depart(struct rq *rq, unsigned long long delta)
 # define schedstat_set(var, val)       do { } while (0)
 #endif
 
-#ifdef CONFIG_SCHEDSTATS
+#if defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT)
 /*
  * Called when a process is dequeued from the active array and given
  * the cpu.  We should note that with the exception of interactive
@@ -157,7 +161,7 @@ static inline void sched_info_dequeued(struct task_struct *t)
  */
 static void sched_info_arrive(struct task_struct *t)
 {
-       unsigned long long now = sched_clock(), delta = 0;
+       unsigned long long now = task_rq(t)->clock, delta = 0;
 
        if (t->sched_info.last_queued)
                delta = now - t->sched_info.last_queued;
@@ -188,19 +192,26 @@ static inline void sched_info_queued(struct task_struct *t)
 {
        if (unlikely(sched_info_on()))
                if (!t->sched_info.last_queued)
-                       t->sched_info.last_queued = sched_clock();
+                       t->sched_info.last_queued = task_rq(t)->clock;
 }
 
 /*
  * Called when a process ceases being the active-running process, either
  * voluntarily or involuntarily.  Now we can calculate how long we ran.
+ * Also, if the process is still in the TASK_RUNNING state, call
+ * sched_info_queued() to mark that it has now again started waiting on
+ * the runqueue.
  */
 static inline void sched_info_depart(struct task_struct *t)
 {
-       unsigned long long delta = sched_clock() - t->sched_info.last_arrival;
+       unsigned long long delta = task_rq(t)->clock -
+                                       t->sched_info.last_arrival;
 
        t->sched_info.cpu_time += delta;
        rq_sched_info_depart(task_rq(t), delta);
+
+       if (t->state == TASK_RUNNING)
+               sched_info_queued(t);
 }
 
 /*
@@ -233,5 +244,5 @@ sched_info_switch(struct task_struct *prev, struct task_struct *next)
 #else
 #define sched_info_queued(t)           do { } while (0)
 #define sched_info_switch(t, next)     do { } while (0)
-#endif /* CONFIG_SCHEDSTATS */
+#endif /* CONFIG_SCHEDSTATS || CONFIG_TASK_DELAY_ACCT */