diff options
| author | Frederic Weisbecker <frederic@kernel.org> | 2024-02-25 23:55:05 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2024-02-26 11:37:32 +0100 |
| commit | 7988e5ae2be70b110db9d4b8ec163bd42e67d3be (patch) | |
| tree | 38186d6bd25835131a681283c62319361205540c /kernel/time/tick-sched.h | |
| parent | a478ffb2ae234ee1ece2b84719762c54d304e2c7 (diff) | |
| download | linux-7988e5ae2be70b110db9d4b8ec163bd42e67d3be.tar.gz | |
tick: Split nohz and highres features from nohz_mode
The nohz mode field tells about low resolution nohz mode or high
resolution nohz mode but it doesn't tell about high resolution non-nohz
mode.
In order to retrieve the latter state, tick_cancel_sched_timer() must
fiddle with struct hrtimer's internals to guess if the tick has been
initialized in high resolution.
Move instead the nohz mode field information into the tick flags and
provide two new bits: one to know if the tick is in nohz mode and
another one to know if the tick is in high resolution. The combination
of those two flags provides all the needed informations to determine
which of the three tick modes is running.
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20240225225508.11587-14-frederic@kernel.org
Diffstat (limited to 'kernel/time/tick-sched.h')
| -rw-r--r-- | kernel/time/tick-sched.h | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/kernel/time/tick-sched.h b/kernel/time/tick-sched.h index 07a4c0144c47ff..bbe72a07898541 100644 --- a/kernel/time/tick-sched.h +++ b/kernel/time/tick-sched.h @@ -14,12 +14,6 @@ struct tick_device { enum tick_device_mode mode; }; -enum tick_nohz_mode { - NOHZ_MODE_INACTIVE, - NOHZ_MODE_LOWRES, - NOHZ_MODE_HIGHRES, -}; - /* The CPU is in the tick idle mode */ #define TS_FLAG_INIDLE BIT(0) /* The idle tick has been stopped */ @@ -31,6 +25,10 @@ enum tick_nohz_mode { #define TS_FLAG_IDLE_ACTIVE BIT(2) /* CPU was the last one doing do_timer before going idle */ #define TS_FLAG_DO_TIMER_LAST BIT(3) +/* NO_HZ is enabled */ +#define TS_FLAG_NOHZ BIT(4) +/* High resolution tick mode */ +#define TS_FLAG_HIGHRES BIT(5) /** * struct tick_sched - sched tick emulation and no idle tick control/stats @@ -84,7 +82,6 @@ struct tick_sched { ktime_t idle_entrytime; /* Tick stop */ - enum tick_nohz_mode nohz_mode; unsigned long last_jiffies; u64 timer_expires_base; u64 timer_expires; @@ -107,7 +104,7 @@ struct tick_sched { extern struct tick_sched *tick_get_tick_sched(int cpu); -extern void tick_setup_sched_timer(int mode); +extern void tick_setup_sched_timer(bool hrtimer); #if defined CONFIG_NO_HZ_COMMON || defined CONFIG_HIGH_RES_TIMERS extern void tick_cancel_sched_timer(int cpu); #else |