From 1ad749980a5fda46f7ec920d8409ddcc89b38714 Mon Sep 17 00:00:00 2001 From: Tony Breeds Date: Fri, 21 Sep 2007 13:26:03 +1000 Subject: [POWERPC] Enable tickless idle and high res timers for powerpc Signed-off-by: Tony Breeds Signed-off-by: Paul Mackerras --- arch/powerpc/Kconfig | 1 + arch/powerpc/kernel/idle.c | 3 +++ arch/powerpc/platforms/iseries/setup.c | 6 ++++++ 3 files changed, 10 insertions(+) (limited to 'arch') diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index a46f8116f47..b387e1ed517 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 a9e9cbd3297..abd2957fe53 100644 --- a/arch/powerpc/kernel/idle.c +++ b/arch/powerpc/kernel/idle.c @@ -24,6 +24,7 @@ #include #include #include +#include #include #include @@ -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 fad493e29d3..37ae07ee54a 100644 --- a/arch/powerpc/platforms/iseries/setup.c +++ b/arch/powerpc/platforms/iseries/setup.c @@ -26,6 +26,8 @@ #include #include #include +#include +#include #include #include @@ -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(); -- cgit v1.2.3