diff options
Diffstat (limited to 'arch/sparc64')
| -rw-r--r-- | arch/sparc64/kernel/process.c | 20 | ||||
| -rw-r--r-- | arch/sparc64/kernel/smp.c | 13 |
2 files changed, 15 insertions, 18 deletions
diff --git a/arch/sparc64/kernel/process.c b/arch/sparc64/kernel/process.c index 2f89206e008f..02f9dec1d459 100644 --- a/arch/sparc64/kernel/process.c +++ b/arch/sparc64/kernel/process.c @@ -85,23 +85,31 @@ void cpu_idle(void) /* * the idle loop on a UltraMultiPenguin... + * + * TIF_POLLING_NRFLAG is set because we do not sleep the cpu + * inside of the idler task, so an interrupt is not needed + * to get a clean fast response. + * + * XXX Reverify this assumption... -DaveM + * + * Addendum: We do want it to do something for the signal + * delivery case, we detect that by just seeing + * if we are trying to send this to an idler or not. */ -#define idle_me_harder() (cpu_data(smp_processor_id()).idle_volume += 1) -#define unidle_me() (cpu_data(smp_processor_id()).idle_volume = 0) void cpu_idle(void) { + cpuinfo_sparc *cpuinfo = &local_cpu_data(); set_thread_flag(TIF_POLLING_NRFLAG); + while(1) { if (need_resched()) { - unidle_me(); - clear_thread_flag(TIF_POLLING_NRFLAG); + cpuinfo->idle_volume = 0; preempt_enable_no_resched(); schedule(); preempt_disable(); - set_thread_flag(TIF_POLLING_NRFLAG); check_pgt_cache(); } - idle_me_harder(); + cpuinfo->idle_volume++; /* The store ordering is so that IRQ handlers on * other cpus see our increasing idleness for the buddy diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c index 8aca4b1dc04e..797a65493fb8 100644 --- a/arch/sparc64/kernel/smp.c +++ b/arch/sparc64/kernel/smp.c @@ -1152,20 +1152,9 @@ void __init smp_cpus_done(unsigned int max_cpus) (bogosum/(5000/HZ))%100); } -/* This needn't do anything as we do not sleep the cpu - * inside of the idler task, so an interrupt is not needed - * to get a clean fast response. - * - * XXX Reverify this assumption... -DaveM - * - * Addendum: We do want it to do something for the signal - * delivery case, we detect that by just seeing - * if we are trying to send this to an idler or not. - */ void smp_send_reschedule(int cpu) { - if (cpu_data(cpu).idle_volume == 0) - smp_receive_signal(cpu); + smp_receive_signal(cpu); } /* This is a nop because we capture all other cpus |