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| author | Ingo Molnar <mingo@elte.hu> | 2008-09-30 12:16:26 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-09-30 12:16:26 +0200 |
| commit | 59293c8ad54726150cf6178164311b004d615ce4 (patch) | |
| tree | 6fcf8e59a2c9ac08a4ff092544c34d2254ac0d74 /arch/x86/oprofile | |
| parent | 45f197ade73ba95681b9803680c75352fc0a1c0a (diff) | |
| parent | 94aca1dac6f6d21f4b07e4864baf7768cabcc6e7 (diff) | |
| download | linux-59293c8ad54726150cf6178164311b004d615ce4.tar.bz2 | |
Merge commit 'v2.6.27-rc8' into oprofile
Conflicts:
arch/x86/oprofile/nmi_int.c
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/oprofile')
| -rw-r--r-- | arch/x86/oprofile/nmi_int.c | 45 |
1 files changed, 39 insertions, 6 deletions
diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c index 4108d02c5292..114df508b407 100644 --- a/arch/x86/oprofile/nmi_int.c +++ b/arch/x86/oprofile/nmi_int.c @@ -16,6 +16,7 @@ #include <linux/slab.h> #include <linux/moduleparam.h> #include <linux/kdebug.h> +#include <linux/cpu.h> #include <asm/nmi.h> #include <asm/msr.h> #include <asm/apic.h> @@ -31,27 +32,50 @@ static DEFINE_PER_CPU(unsigned long, saved_lvtpc); static int nmi_start(void); static void nmi_stop(void); +static void nmi_cpu_start(void *dummy); +static void nmi_cpu_stop(void *dummy); static void nmi_cpu_save_mpx_registers(struct op_msrs *msrs); static void nmi_cpu_restore_mpx_registers(struct op_msrs *msrs); -static void nmi_cpu_stop(void *dummy); -static void nmi_cpu_start(void *dummy); /* 0 == registered but off, 1 == registered and on */ static int nmi_enabled = 0; +#ifdef CONFIG_SMP +static int oprofile_cpu_notifier(struct notifier_block *b, unsigned long action, + void *data) +{ + int cpu = (unsigned long)data; + switch (action) { + case CPU_DOWN_FAILED: + case CPU_ONLINE: + smp_call_function_single(cpu, nmi_cpu_start, NULL, 0); + break; + case CPU_DOWN_PREPARE: + smp_call_function_single(cpu, nmi_cpu_stop, NULL, 1); + break; + } + return NOTIFY_DONE; +} + +static struct notifier_block oprofile_cpu_nb = { + .notifier_call = oprofile_cpu_notifier +}; +#endif + #ifdef CONFIG_PM static int nmi_suspend(struct sys_device *dev, pm_message_t state) { + /* Only one CPU left, just stop that one */ if (nmi_enabled == 1) - nmi_stop(); + nmi_cpu_stop(NULL); return 0; } static int nmi_resume(struct sys_device *dev) { if (nmi_enabled == 1) - nmi_start(); + nmi_cpu_start(NULL); return 0; } @@ -351,10 +375,12 @@ static void nmi_cpu_shutdown(void *dummy) static void nmi_shutdown(void) { - struct op_msrs *msrs = &get_cpu_var(cpu_msrs); + struct op_msrs *msrs; + nmi_enabled = 0; on_each_cpu(nmi_cpu_shutdown, NULL, 1); unregister_die_notifier(&profile_exceptions_nb); + msrs = &get_cpu_var(cpu_msrs); model->shutdown(msrs); free_msrs(); put_cpu_var(cpu_msrs); @@ -550,6 +576,9 @@ int __init op_nmi_init(struct oprofile_operations *ops) return -ENODEV; } +#ifdef CONFIG_SMP + register_cpu_notifier(&oprofile_cpu_nb); +#endif /* default values, can be overwritten by model */ __raw_get_cpu_var(switch_index) = 0; ops->create_files = nmi_create_files; @@ -573,8 +602,12 @@ int __init op_nmi_init(struct oprofile_operations *ops) void op_nmi_exit(void) { - if (using_nmi) + if (using_nmi) { exit_sysfs(); +#ifdef CONFIG_SMP + unregister_cpu_notifier(&oprofile_cpu_nb); +#endif if (model->exit) model->exit(); + } } |