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| author | Tony Breeds <tony@bakeyournoodle.com> | 2007-09-21 05:26:03 +0200 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2007-10-03 07:44:34 +0200 |
| commit | 1ad749980a5fda46f7ec920d8409ddcc89b38714 (patch) | |
| tree | 3c1b28f1f6e03660c36e6f320fce54e4e5a1eb5e | |
| parent | [POWERPC] Implement clockevents driver for powerpc (diff) | |
| download | linux-1ad749980a5fda46f7ec920d8409ddcc89b38714.tar.xz linux-1ad749980a5fda46f7ec920d8409ddcc89b38714.zip | |
[POWERPC] Enable tickless idle and high res timers for powerpc
Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
| -rw-r--r-- | arch/powerpc/Kconfig | 1 | ||||
| -rw-r--r-- | arch/powerpc/kernel/idle.c | 3 | ||||
| -rw-r--r-- | arch/powerpc/platforms/iseries/setup.c | 6 |
3 files changed, 10 insertions, 0 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index a46f8116f476..b387e1ed5177 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -173,6 +173,7 @@ config HIGHMEM bool "High memory support" depends on PPC32 +source kernel/time/Kconfig source kernel/Kconfig.hz source kernel/Kconfig.preempt source "fs/Kconfig.binfmt" diff --git a/arch/powerpc/kernel/idle.c b/arch/powerpc/kernel/idle.c index a9e9cbd32975..abd2957fe537 100644 --- a/arch/powerpc/kernel/idle.c +++ b/arch/powerpc/kernel/idle.c @@ -24,6 +24,7 @@ #include <linux/smp.h> #include <linux/cpu.h> #include <linux/sysctl.h> +#include <linux/tick.h> #include <asm/system.h> #include <asm/processor.h> @@ -59,6 +60,7 @@ void cpu_idle(void) set_thread_flag(TIF_POLLING_NRFLAG); while (1) { + tick_nohz_stop_sched_tick(); while (!need_resched() && !cpu_should_die()) { ppc64_runlatch_off(); @@ -90,6 +92,7 @@ void cpu_idle(void) HMT_medium(); ppc64_runlatch_on(); + tick_nohz_restart_sched_tick(); if (cpu_should_die()) cpu_die(); preempt_enable_no_resched(); diff --git a/arch/powerpc/platforms/iseries/setup.c b/arch/powerpc/platforms/iseries/setup.c index fad493e29d37..37ae07ee54a9 100644 --- a/arch/powerpc/platforms/iseries/setup.c +++ b/arch/powerpc/platforms/iseries/setup.c @@ -26,6 +26,8 @@ #include <linux/major.h> #include <linux/root_dev.h> #include <linux/kernel.h> +#include <linux/hrtimer.h> +#include <linux/tick.h> #include <asm/processor.h> #include <asm/machdep.h> @@ -561,6 +563,7 @@ static void yield_shared_processor(void) static void iseries_shared_idle(void) { while (1) { + tick_nohz_stop_sched_tick(); while (!need_resched() && !hvlpevent_is_pending()) { local_irq_disable(); ppc64_runlatch_off(); @@ -574,6 +577,7 @@ static void iseries_shared_idle(void) } ppc64_runlatch_on(); + tick_nohz_restart_sched_tick(); if (hvlpevent_is_pending()) process_iSeries_events(); @@ -589,6 +593,7 @@ static void iseries_dedicated_idle(void) set_thread_flag(TIF_POLLING_NRFLAG); while (1) { + tick_nohz_stop_sched_tick(); if (!need_resched()) { while (!need_resched()) { ppc64_runlatch_off(); @@ -605,6 +610,7 @@ static void iseries_dedicated_idle(void) } ppc64_runlatch_on(); + tick_nohz_restart_sched_tick(); preempt_enable_no_resched(); schedule(); preempt_disable(); |