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authorLinus Torvalds <torvalds@linux-foundation.org>2008-09-05 17:37:15 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-09-05 17:37:15 -0400
commit7f621861fbdb1ea90c36b1a59a45cb84b4a2239f (patch)
tree73d72c4598277481b9e95a0c6fda65ca466ae7c2 /fs
parent1c402c8cd1fb4d0524bab184f8609f7e098ccb2e (diff)
parent49048622eae698e5c4ae61f7e71200f265ccc529 (diff)
Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: sched: fix process time monotonicity sched_clock: fix NOHZ interaction
Diffstat (limited to 'fs')
-rw-r--r--fs/proc/array.c59
1 files changed, 0 insertions, 59 deletions
diff --git a/fs/proc/array.c b/fs/proc/array.c
index 0d6eb33597c6..71c9be59c9c2 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -337,65 +337,6 @@ int proc_pid_status(struct seq_file *m, struct pid_namespace *ns,
337 return 0; 337 return 0;
338} 338}
339 339
340/*
341 * Use precise platform statistics if available:
342 */
343#ifdef CONFIG_VIRT_CPU_ACCOUNTING
344static cputime_t task_utime(struct task_struct *p)
345{
346 return p->utime;
347}
348
349static cputime_t task_stime(struct task_struct *p)
350{
351 return p->stime;
352}
353#else
354static cputime_t task_utime(struct task_struct *p)
355{
356 clock_t utime = cputime_to_clock_t(p->utime),
357 total = utime + cputime_to_clock_t(p->stime);
358 u64 temp;
359
360 /*
361 * Use CFS's precise accounting:
362 */
363 temp = (u64)nsec_to_clock_t(p->se.sum_exec_runtime);
364
365 if (total) {
366 temp *= utime;
367 do_div(temp, total);
368 }
369 utime = (clock_t)temp;
370
371 p->prev_utime = max(p->prev_utime, clock_t_to_cputime(utime));
372 return p->prev_utime;
373}
374
375static cputime_t task_stime(struct task_struct *p)
376{
377 clock_t stime;
378
379 /*
380 * Use CFS's precise accounting. (we subtract utime from
381 * the total, to make sure the total observed by userspace
382 * grows monotonically - apps rely on that):
383 */
384 stime = nsec_to_clock_t(p->se.sum_exec_runtime) -
385 cputime_to_clock_t(task_utime(p));
386
387 if (stime >= 0)
388 p->prev_stime = max(p->prev_stime, clock_t_to_cputime(stime));
389
390 return p->prev_stime;
391}
392#endif
393
394static cputime_t task_gtime(struct task_struct *p)
395{
396 return p->gtime;
397}
398
399static int do_task_stat(struct seq_file *m, struct pid_namespace *ns, 340static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
400 struct pid *pid, struct task_struct *task, int whole) 341 struct pid *pid, struct task_struct *task, int whole)
401{ 342{