Messages in this thread Patch in this message | | | Date | Tue, 29 Oct 2019 09:52:20 -0000 | From | "tip-bot2 for Frederic Weisbecker" <> | Subject | [tip: sched/core] sched/vtime: Introduce vtime_accounting_enabled_cpu() |
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The following commit has been merged into the sched/core branch of tip:
Commit-ID: 9adbb9dd4c4eb45e1129fc73d8de69ca72350f81 Gitweb: https://git.kernel.org/tip/9adbb9dd4c4eb45e1129fc73d8de69ca72350f81 Author: Frederic Weisbecker <frederic@kernel.org> AuthorDate: Wed, 16 Oct 2019 04:56:55 +02:00 Committer: Ingo Molnar <mingo@kernel.org> CommitterDate: Tue, 29 Oct 2019 10:01:15 +01:00
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> --- include/linux/vtime.h | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-)
diff --git a/include/linux/vtime.h b/include/linux/vtime.h index eb2e7a1..e2733bf 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) { }
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