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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-10-09 06:35:05 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-10-09 06:35:05 -0400 |
| commit | 47137c6ba1bcde30215795f9594cea770946456b (patch) | |
| tree | 3a7a04e6ecffcb188b6708ccdc3f02b70f07d7c4 /kernel/time | |
| parent | afa3536be88b435a057cb727b48fd3d760a497d2 (diff) | |
| parent | 867f667fb9c6734e06cc24e96fc7f06a7e772084 (diff) | |
| download | linux-47137c6ba1bcde30215795f9594cea770946456b.tar.bz2 | |
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer updates from Thomas Gleixner:
"Nothing really exciting this time:
- a few fixlets in the NOHZ code
- a new ARM SoC timer abomination. One should expect that we have
enough of them already, but they insist on inventing new ones.
- the usual bunch of ARM SoC timer updates. That feels like herding
cats"
* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
clocksource: arm_arch_timer: Consolidate arch_timer_evtstrm_enable
clocksource: arm_arch_timer: Enable counter access for 32-bit ARM
clocksource: arm_arch_timer: Change clocksource name if CP15 unavailable
clocksource: sirf: Disable counter before re-setting it
clocksource: cadence_ttc: Add support for 32bit mode
clocksource: tcb_clksrc: Sanitize IRQ request
clocksource: arm_arch_timer: Discard unavailable timers correctly
clocksource: vf_pit_timer: Support shutdown mode
ARM: meson6: clocksource: Add Meson6 timer support
ARM: meson: documentation: Add timer documentation
clocksource: sh_tmu: Document r8a7779 binding
clocksource: sh_mtu2: Document r7s72100 binding
clocksource: sh_cmt: Document SoC specific bindings
timerfd: Remove an always true check
nohz: Avoid tick's double reprogramming in highres mode
nohz: Fix spurious periodic tick behaviour in low-res dynticks mode
Diffstat (limited to 'kernel/time')
| -rw-r--r-- | kernel/time/tick-sched.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index 5a9ff243588c..7c1412ea2d29 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -996,6 +996,10 @@ static void tick_nohz_handler(struct clock_event_device *dev) tick_sched_do_timer(now); tick_sched_handle(ts, regs); + /* No need to reprogram if we are running tickless */ + if (unlikely(ts->tick_stopped)) + return; + while (tick_nohz_reprogram(ts, now)) { now = ktime_get(); tick_do_update_jiffies64(now); @@ -1123,6 +1127,10 @@ static enum hrtimer_restart tick_sched_timer(struct hrtimer *timer) if (regs) tick_sched_handle(ts, regs); + /* No need to reprogram if we are in idle or full dynticks mode */ + if (unlikely(ts->tick_stopped)) + return HRTIMER_NORESTART; + hrtimer_forward(timer, now, tick_period); return HRTIMER_RESTART; |