diff options
| author | Frederic Weisbecker <frederic@kernel.org> | 2019-10-16 04:56:55 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-10-29 10:01:15 +0100 |
| commit | 9adbb9dd4c4eb45e1129fc73d8de69ca72350f81 (patch) | |
| tree | 59ece784f86ef5e8d6709403a764597ba2d27cda | |
| parent | e44fcb4b7a299602fb300b82a546c0b8a50d9d90 (diff) | |
sched/vtime: Introduce vtime_accounting_enabled_cpu()
This allows us to check if a remote CPU runs vtime accounting
(ie: is nohz_full). We'll need that to reliably support reading kcpustat
on nohz_full CPUs.
Also simplify a bit the condition in the local flavoured function while
at it.
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J . Wysocki <rjw@rjwysocki.net>
Cc: Rik van Riel <riel@surriel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Wanpeng Li <wanpengli@tencent.com>
Cc: Yauheni Kaliuta <yauheni.kaliuta@redhat.com>
Link: https://lkml.kernel.org/r/20191016025700.31277-10-frederic@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
| -rw-r--r-- | include/linux/vtime.h | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/include/linux/vtime.h b/include/linux/vtime.h index eb2e7a19054b..e2733bf33541 100644 --- a/include/linux/vtime.h +++ b/include/linux/vtime.h @@ -31,14 +31,14 @@ static inline bool vtime_accounting_enabled(void) return context_tracking_enabled(); } -static inline bool vtime_accounting_enabled_this_cpu(void) +static inline bool vtime_accounting_enabled_cpu(int cpu) { - if (vtime_accounting_enabled()) { - if (context_tracking_enabled_this_cpu()) - return true; - } + return (vtime_accounting_enabled() && context_tracking_enabled_cpu(cpu)); +} - return false; +static inline bool vtime_accounting_enabled_this_cpu(void) +{ + return (vtime_accounting_enabled() && context_tracking_enabled_this_cpu()); } extern void vtime_task_switch_generic(struct task_struct *prev); @@ -51,6 +51,7 @@ static inline void vtime_task_switch(struct task_struct *prev) #else /* !CONFIG_VIRT_CPU_ACCOUNTING */ +static inline bool vtime_accounting_enabled_cpu(int cpu) {return false; } static inline bool vtime_accounting_enabled_this_cpu(void) { return false; } static inline void vtime_task_switch(struct task_struct *prev) { } |