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| author |   Thomas Gleixner <tglx@linutronix.de> | 2019-08-21 21:08:53 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2019-08-28 11:50:27 +0200 |
| commit | a324956fae05d863386c682830e917f6685f1d4f (patch) | |
| tree | 847f4905af5aa154d03943457c302a81d0d2444d /kernel/time | |
| parent | itimers: Use quick sample function (diff) | |
| download | linux-dev-a324956fae05d863386c682830e917f6685f1d4f.tar.xz linux-dev-a324956fae05d863386c682830e917f6685f1d4f.zip | |
posix-cpu-timers: Sample directly in timer check
The thread group accounting is active, otherwise the expiry function would
not be running. Sample the thread group time directly.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Link: https://lkml.kernel.org/r/20190821192919.780348088@linutronix.de
Diffstat (limited to 'kernel/time')
| -rw-r--r-- | kernel/time/posix-cpu-timers.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c index c22b6b604a95..cb736787145b 100644 --- a/kernel/time/posix-cpu-timers.c +++ b/kernel/time/posix-cpu-timers.c @@ -914,16 +914,17 @@ static void check_process_timers(struct task_struct *tsk, if (!READ_ONCE(tsk->signal->cputimer.running)) return; - /* + /* * Signify that a thread is checking for process timers. * Write access to this field is protected by the sighand lock. */ sig->cputimer.checking_timer = true; /* - * Collect the current process totals. + * Collect the current process totals. Group accounting is active + * so the sample can be taken directly. */ - thread_group_cputimer(tsk, &cputime); + sample_cputime_atomic(&cputime, &sig->cputimer.cputime_atomic); utime = cputime.utime; ptime = utime + cputime.stime; sum_sched_runtime = cputime.sum_exec_runtime; |