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| author | Ingo Molnar <mingo@kernel.org> | 2016-07-14 10:37:48 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-07-14 10:37:48 +0200 |
| commit | cefef3a76287c9b51e946d312aea1637bb3a57ff (patch) | |
| tree | acc1ee1a6a530803951e3c0a0ca65c08a567f563 /kernel/sched/cputime.c | |
| parent | 92d21ac74a9e3c09b0b01c764e530657e4c85c49 (diff) | |
| parent | 748c7201e622d1c24abb4f85072d2e74d12f295f (diff) | |
| download | linux-cefef3a76287c9b51e946d312aea1637bb3a57ff.tar.bz2 | |
Merge branch 'sched/core' into timers/nohz, to avoid conflicts in upcoming patches
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/cputime.c')
| -rw-r--r-- | kernel/sched/cputime.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c index 75f98c5498d5..3d60e5d76fdb 100644 --- a/kernel/sched/cputime.c +++ b/kernel/sched/cputime.c @@ -257,7 +257,7 @@ void account_idle_time(cputime_t cputime) cpustat[CPUTIME_IDLE] += (__force u64) cputime; } -static __always_inline bool steal_account_process_tick(void) +static __always_inline unsigned long steal_account_process_tick(unsigned long max_jiffies) { #ifdef CONFIG_PARAVIRT if (static_key_false(¶virt_steal_enabled)) { @@ -272,14 +272,14 @@ static __always_inline bool steal_account_process_tick(void) * time in jiffies. Lets cast the result to jiffies * granularity and account the rest on the next rounds. */ - steal_jiffies = nsecs_to_jiffies(steal); + steal_jiffies = min(nsecs_to_jiffies(steal), max_jiffies); this_rq()->prev_steal_time += jiffies_to_nsecs(steal_jiffies); account_steal_time(jiffies_to_cputime(steal_jiffies)); return steal_jiffies; } #endif - return false; + return 0; } /* @@ -346,7 +346,7 @@ static void irqtime_account_process_tick(struct task_struct *p, int user_tick, u64 cputime = (__force u64) cputime_one_jiffy; u64 *cpustat = kcpustat_this_cpu->cpustat; - if (steal_account_process_tick()) + if (steal_account_process_tick(ULONG_MAX)) return; cputime *= ticks; @@ -477,7 +477,7 @@ void account_process_tick(struct task_struct *p, int user_tick) return; } - if (steal_account_process_tick()) + if (steal_account_process_tick(ULONG_MAX)) return; if (user_tick) @@ -681,12 +681,14 @@ static cputime_t vtime_delta(struct task_struct *tsk) static cputime_t get_vtime_delta(struct task_struct *tsk) { unsigned long now = READ_ONCE(jiffies); - unsigned long delta = now - tsk->vtime_snap; + unsigned long delta_jiffies, steal_jiffies; + delta_jiffies = now - tsk->vtime_snap; + steal_jiffies = steal_account_process_tick(delta_jiffies); WARN_ON_ONCE(tsk->vtime_snap_whence == VTIME_INACTIVE); tsk->vtime_snap = now; - return jiffies_to_cputime(delta); + return jiffies_to_cputime(delta_jiffies - steal_jiffies); } static void __vtime_account_system(struct task_struct *tsk) |