+
+int __delayacct_add_tsk(struct taskstats *d, struct task_struct *tsk)
+{
+ s64 tmp;
+ unsigned long t1;
+ unsigned long long t2, t3;
+ unsigned long flags;
+ struct timespec ts;
+
+ /* Though tsk->delays accessed later, early exit avoids
+ * unnecessary returning of other data
+ */
+ if (!tsk->delays)
+ goto done;
+
+ tmp = (s64)d->cpu_run_real_total;
+ cputime_to_timespec(tsk->utime + tsk->stime, &ts);
+ tmp += timespec_to_ns(&ts);
+ d->cpu_run_real_total = (tmp < (s64)d->cpu_run_real_total) ? 0 : tmp;
+
+ tmp = (s64)d->cpu_scaled_run_real_total;
+ cputime_to_timespec(tsk->utimescaled + tsk->stimescaled, &ts);
+ tmp += timespec_to_ns(&ts);
+ d->cpu_scaled_run_real_total =
+ (tmp < (s64)d->cpu_scaled_run_real_total) ? 0 : tmp;
+
+ /*
+ * No locking available for sched_info (and too expensive to add one)
+ * Mitigate by taking snapshot of values
+ */
+ t1 = tsk->sched_info.pcount;
+ t2 = tsk->sched_info.run_delay;
+ t3 = tsk->se.sum_exec_runtime;
+
+ d->cpu_count += t1;
+
+ tmp = (s64)d->cpu_delay_total + t2;
+ d->cpu_delay_total = (tmp < (s64)d->cpu_delay_total) ? 0 : tmp;
+
+ tmp = (s64)d->cpu_run_virtual_total + t3;
+ d->cpu_run_virtual_total =
+ (tmp < (s64)d->cpu_run_virtual_total) ? 0 : tmp;
+
+ /* zero XXX_total, non-zero XXX_count implies XXX stat overflowed */
+
+ spin_lock_irqsave(&tsk->delays->lock, flags);
+ tmp = d->blkio_delay_total + tsk->delays->blkio_delay;
+ d->blkio_delay_total = (tmp < d->blkio_delay_total) ? 0 : tmp;
+ tmp = d->swapin_delay_total + tsk->delays->swapin_delay;
+ d->swapin_delay_total = (tmp < d->swapin_delay_total) ? 0 : tmp;
+ tmp = d->freepages_delay_total + tsk->delays->freepages_delay;
+ d->freepages_delay_total = (tmp < d->freepages_delay_total) ? 0 : tmp;
+ d->blkio_count += tsk->delays->blkio_count;
+ d->swapin_count += tsk->delays->swapin_count;
+ d->freepages_count += tsk->delays->freepages_count;
+ spin_unlock_irqrestore(&tsk->delays->lock, flags);
+
+done:
+ return 0;
+}
+
+__u64 __delayacct_blkio_ticks(struct task_struct *tsk)
+{
+ __u64 ret;
+ unsigned long flags;
+
+ spin_lock_irqsave(&tsk->delays->lock, flags);
+ ret = nsec_to_clock_t(tsk->delays->blkio_delay +
+ tsk->delays->swapin_delay);
+ spin_unlock_irqrestore(&tsk->delays->lock, flags);
+ return ret;
+}
+
+void __delayacct_freepages_start(void)
+{
+ delayacct_start(¤t->delays->freepages_start);
+}
+
+void __delayacct_freepages_end(void)
+{
+ delayacct_end(¤t->delays->freepages_start,
+ ¤t->delays->freepages_end,
+ ¤t->delays->freepages_delay,
+ ¤t->delays->freepages_count);
+}
+