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authorFrederic Weisbecker <fweisbec@gmail.com>2012-11-13 17:20:55 +0400
committerFrederic Weisbecker <fweisbec@gmail.com>2013-01-27 22:23:31 +0400
commit6fac4829ce0ef9b7f24369086ce5f0e9f38d37bc (patch)
tree44da712b66d778c2fd701f9c96b00e108530e1a9 /kernel/acct.c
parent3f4724ea85b7d9055a9976fa8f30b471bdfbca93 (diff)
downloadlinux-6fac4829ce0ef9b7f24369086ce5f0e9f38d37bc.tar.xz
cputime: Use accessors to read task cputime stats
This is in preparation for the full dynticks feature. While remotely reading the cputime of a task running in a full dynticks CPU, we'll need to do some extra-computation. This way we can account the time it spent tickless in userspace since its last cputime snapshot. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Li Zhong <zhong@linux.vnet.ibm.com> Cc: Namhyung Kim <namhyung.kim@lge.com> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/acct.c')
-rw-r--r--kernel/acct.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/kernel/acct.c b/kernel/acct.c
index 051e071a06e7..e8b1627ab9c7 100644
--- a/kernel/acct.c
+++ b/kernel/acct.c
@@ -566,6 +566,7 @@ out:
void acct_collect(long exitcode, int group_dead)
{
struct pacct_struct *pacct = &current->signal->pacct;
+ cputime_t utime, stime;
unsigned long vsize = 0;
if (group_dead && current->mm) {
@@ -593,8 +594,9 @@ void acct_collect(long exitcode, int group_dead)
pacct->ac_flag |= ACORE;
if (current->flags & PF_SIGNALED)
pacct->ac_flag |= AXSIG;
- pacct->ac_utime += current->utime;
- pacct->ac_stime += current->stime;
+ task_cputime(current, &utime, &stime);
+ pacct->ac_utime += utime;
+ pacct->ac_stime += stime;
pacct->ac_minflt += current->min_flt;
pacct->ac_majflt += current->maj_flt;
spin_unlock_irq(&current->sighand->siglock);