diff options
Diffstat (limited to 'kernel/smp.c')
| -rw-r--r-- | kernel/smp.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/kernel/smp.c b/kernel/smp.c index f38a1e69225..ca0789f1755 100644 --- a/kernel/smp.c +++ b/kernel/smp.c @@ -14,6 +14,8 @@ #include <linux/smp.h> #include <linux/cpu.h> #include <linux/sched.h> +#define CREATE_TRACE_POINTS +#include <trace/events/smp.h> #include "smpboot.h" @@ -152,7 +154,9 @@ static int generic_exec_single(int cpu, struct call_single_data *csd, if (cpu == smp_processor_id()) { local_irq_save(flags); + trace_smp_call_func_entry(func); func(info); + trace_smp_call_func_exit(func); local_irq_restore(flags); return 0; } @@ -187,8 +191,10 @@ static int generic_exec_single(int cpu, struct call_single_data *csd, * locking and barrier primitives. Generic code isn't really * equipped to do the right thing... */ - if (llist_add(&csd->llist, &per_cpu(call_single_queue, cpu))) + if (llist_add(&csd->llist, &per_cpu(call_single_queue, cpu))) { + trace_smp_call_func_send(csd->func, cpu); arch_send_call_function_single_ipi(cpu); + } if (wait) csd_lock_wait(csd); @@ -250,7 +256,9 @@ static void flush_smp_call_function_queue(bool warn_cpu_offline) } llist_for_each_entry_safe(csd, csd_next, entry, llist) { + trace_smp_call_func_entry(csd->func); csd->func(csd->info); + trace_smp_call_func_exit(csd->func); csd_unlock(csd); } @@ -277,6 +285,7 @@ int smp_call_function_single(int cpu, smp_call_func_t func, void *info, int this_cpu; int err; + trace_smp_call_func_send(func, cpu); /* * prevent preemption and reschedule on another processor, * as well as CPU removal |