diff options
| -rw-r--r-- | arch/x86/kernel/tsc.c | 2 | ||||
| -rw-r--r-- | kernel/sched/clock.c | 3 | ||||
| -rw-r--r-- | kernel/sched/cputime.c | 9 | ||||
| -rw-r--r-- | kernel/sched/sched.h | 4 |
4 files changed, 10 insertions, 8 deletions
diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c index 7d3e13e14eab..7be44b5198cf 100644 --- a/arch/x86/kernel/tsc.c +++ b/arch/x86/kernel/tsc.c @@ -1143,7 +1143,6 @@ static void tsc_cs_mark_unstable(struct clocksource *cs) tsc_unstable = 1; if (using_native_sched_clock()) clear_sched_clock_stable(); - disable_sched_clock_irqtime(); pr_info("Marking TSC unstable due to clocksource watchdog\n"); } @@ -1213,7 +1212,6 @@ void mark_tsc_unstable(char *reason) tsc_unstable = 1; if (using_native_sched_clock()) clear_sched_clock_stable(); - disable_sched_clock_irqtime(); pr_info("Marking TSC unstable due to %s\n", reason); clocksource_mark_unstable(&clocksource_tsc_early); diff --git a/kernel/sched/clock.c b/kernel/sched/clock.c index f5e6dd6a6b3a..2ae4fbf13431 100644 --- a/kernel/sched/clock.c +++ b/kernel/sched/clock.c @@ -173,6 +173,7 @@ notrace static void __sched_clock_work(struct work_struct *work) scd->tick_gtod, __gtod_offset, scd->tick_raw, __sched_clock_offset); + disable_sched_clock_irqtime(); static_branch_disable(&__sched_clock_stable); } @@ -238,6 +239,8 @@ static int __init sched_clock_init_late(void) if (__sched_clock_stable_early) __set_sched_clock_stable(); + else + disable_sched_clock_irqtime(); /* disable if clock unstable. */ return 0; } diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c index 4f97896887ec..ff0dfca95420 100644 --- a/kernel/sched/cputime.c +++ b/kernel/sched/cputime.c @@ -12,6 +12,8 @@ #ifdef CONFIG_IRQ_TIME_ACCOUNTING +DEFINE_STATIC_KEY_FALSE(sched_clock_irqtime); + /* * There are no locks covering percpu hardirq/softirq time. * They are only modified in vtime_account, on corresponding CPU @@ -25,16 +27,15 @@ */ DEFINE_PER_CPU(struct irqtime, cpu_irqtime); -int sched_clock_irqtime; - void enable_sched_clock_irqtime(void) { - sched_clock_irqtime = 1; + static_branch_enable(&sched_clock_irqtime); } void disable_sched_clock_irqtime(void) { - sched_clock_irqtime = 0; + if (irqtime_enabled()) + static_branch_disable(&sched_clock_irqtime); } static void irqtime_account_delta(struct irqtime *irqtime, u64 delta, diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 2aa4251c1520..a821cc8b2dd8 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -3333,11 +3333,11 @@ struct irqtime { }; DECLARE_PER_CPU(struct irqtime, cpu_irqtime); -extern int sched_clock_irqtime; +DECLARE_STATIC_KEY_FALSE(sched_clock_irqtime); static inline int irqtime_enabled(void) { - return sched_clock_irqtime; + return static_branch_likely(&sched_clock_irqtime); } /* |