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tracing: Move tracing_max_latency into trace_array

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In preparation for letting the latency tracers be used by instances,
remove the global tracing_max_latency variable and add a max_latency
field to the trace_array that the latency tracers will now use.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt (Red Hat)
2014-01-14 11:28:38 -05:00
committed by Steven Rostedt
parent 4104d326b6
commit 6d9b3fa5e7
5 changed files with 33 additions and 36 deletions
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14
kernel/trace/trace.c
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@@ -982,8 +982,6 @@ static arch_spinlock_t ftrace_max_lock =
unsigned long __read_mostly tracing_thresh;
#ifdef CONFIG_TRACER_MAX_TRACE
unsigned long __read_mostly tracing_max_latency;
/*
* Copy the new maximum trace into the separate maximum-trace
* structure. (this way the maximum trace is permanently saved,
@@ -1000,7 +998,7 @@ __update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu)
max_buf->cpu = cpu;
max_buf->time_start = data->preempt_timestamp;
max_data->saved_latency = tracing_max_latency;
max_data->saved_latency = tr->max_latency;
max_data->critical_start = data->critical_start;
max_data->critical_end = data->critical_end;
@@ -6328,6 +6326,11 @@ init_tracer_debugfs(struct trace_array *tr, struct dentry *d_tracer)
trace_create_file("tracing_on", 0644, d_tracer,
tr, &rb_simple_fops);
#ifdef CONFIG_TRACER_MAX_TRACE
trace_create_file("tracing_max_latency", 0644, d_tracer,
&tr->max_latency, &tracing_max_lat_fops);
#endif
if (ftrace_create_function_files(tr, d_tracer))
WARN(1, "Could not allocate function filter files");
@@ -6353,11 +6356,6 @@ static __init int tracer_init_debugfs(void)
init_tracer_debugfs(&global_trace, d_tracer);
#ifdef CONFIG_TRACER_MAX_TRACE
trace_create_file("tracing_max_latency", 0644, d_tracer,
&tracing_max_latency, &tracing_max_lat_fops);
#endif
trace_create_file("tracing_thresh", 0644, d_tracer,
&tracing_thresh, &tracing_max_lat_fops);