diff options
author | Steven Rostedt <rostedt@goodmis.org> | 2008-05-22 11:49:22 -0400 |
---|---|---|
committer | Thomas Gleixner <tglx@linutronix.de> | 2008-05-26 22:51:49 +0200 |
commit | 41bc8144d02028133bcd1d545023c6f49e8b2411 (patch) | |
tree | 382a6bbd0560df129c27b490aca36404edd7b19a /kernel/trace | |
parent | 41c52c0db9607e59f90da7da5309489fa06e887f (diff) | |
download | kernel_samsung_smdk4412-41bc8144d02028133bcd1d545023c6f49e8b2411.zip kernel_samsung_smdk4412-41bc8144d02028133bcd1d545023c6f49e8b2411.tar.gz kernel_samsung_smdk4412-41bc8144d02028133bcd1d545023c6f49e8b2411.tar.bz2 |
ftrace: fix up cmdline recording
The new work with converting the trace hooks over to markers broke the
command line recording of ftrace. This patch fixes it again.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/trace')
-rw-r--r-- | kernel/trace/trace.c | 3 | ||||
-rw-r--r-- | kernel/trace/trace.h | 4 | ||||
-rw-r--r-- | kernel/trace/trace_functions.c | 4 | ||||
-rw-r--r-- | kernel/trace/trace_sched_switch.c | 21 |
4 files changed, 19 insertions, 13 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 583fe24..0feae23 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -652,9 +652,6 @@ static char saved_cmdlines[SAVED_CMDLINES][TASK_COMM_LEN]; static int cmdline_idx; static DEFINE_SPINLOCK(trace_cmdline_lock); -/* trace in all context switches */ -atomic_t trace_record_cmdline_enabled __read_mostly; - /* temporary disable recording */ atomic_t trace_record_cmdline_disabled __read_mostly; diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index c460e85..6b8bd88 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -218,6 +218,8 @@ void trace_function(struct trace_array *tr, void tracing_start_function_trace(void); void tracing_stop_function_trace(void); +void tracing_start_cmdline_record(void); +void tracing_stop_cmdline_record(void); int register_tracer(struct tracer *type); void unregister_tracer(struct tracer *type); @@ -226,8 +228,6 @@ extern unsigned long nsecs_to_usecs(unsigned long nsecs); extern unsigned long tracing_max_latency; extern unsigned long tracing_thresh; -extern atomic_t trace_record_cmdline_enabled; - void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu); void update_max_tr_single(struct trace_array *tr, struct task_struct *tsk, int cpu); diff --git a/kernel/trace/trace_functions.c b/kernel/trace/trace_functions.c index 0a08465..7ee7dcd 100644 --- a/kernel/trace/trace_functions.c +++ b/kernel/trace/trace_functions.c @@ -29,14 +29,14 @@ static void function_reset(struct trace_array *tr) static void start_function_trace(struct trace_array *tr) { function_reset(tr); - atomic_inc(&trace_record_cmdline_enabled); + tracing_start_cmdline_record(); tracing_start_function_trace(); } static void stop_function_trace(struct trace_array *tr) { tracing_stop_function_trace(); - atomic_dec(&trace_record_cmdline_enabled); + tracing_stop_cmdline_record(); } static void function_trace_init(struct trace_array *tr) diff --git a/kernel/trace/trace_sched_switch.c b/kernel/trace/trace_sched_switch.c index 798ec0d..c16935d 100644 --- a/kernel/trace/trace_sched_switch.c +++ b/kernel/trace/trace_sched_switch.c @@ -29,6 +29,9 @@ sched_switch_func(void *private, void *__rq, struct task_struct *prev, long disabled; int cpu; + tracing_record_cmdline(prev); + tracing_record_cmdline(next); + if (!tracer_enabled) return; @@ -63,8 +66,6 @@ sched_switch_callback(void *probe_data, void *call_data, prev = va_arg(*args, typeof(prev)); next = va_arg(*args, typeof(next)); - tracing_record_cmdline(prev); - /* * If tracer_switch_func only points to the local * switch func, it still needs the ptr passed to it. @@ -213,18 +214,26 @@ void tracing_stop_sched_switch(void) tracing_sched_unregister(); } +void tracing_start_cmdline_record(void) +{ + tracing_start_sched_switch(); +} + +void tracing_stop_cmdline_record(void) +{ + tracing_stop_sched_switch(); +} + static void start_sched_trace(struct trace_array *tr) { sched_switch_reset(tr); - atomic_inc(&trace_record_cmdline_enabled); tracer_enabled = 1; - tracing_start_sched_switch(); + tracing_start_cmdline_record(); } static void stop_sched_trace(struct trace_array *tr) { - tracing_stop_sched_switch(); - atomic_dec(&trace_record_cmdline_enabled); + tracing_stop_cmdline_record(); tracer_enabled = 0; } |