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@@ -374,6 +374,21 @@ static int __init set_buf_size(char *str)
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}
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__setup("trace_buf_size=", set_buf_size);
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+static int __init set_tracing_thresh(char *str)
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+{
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+ unsigned long threshhold;
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+ int ret;
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+
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+ if (!str)
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+ return 0;
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+ ret = strict_strtoul(str, 0, &threshhold);
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+ if (ret < 0)
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+ return 0;
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+ tracing_thresh = threshhold * 1000;
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+ return 1;
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+}
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+__setup("tracing_thresh=", set_tracing_thresh);
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+
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unsigned long nsecs_to_usecs(unsigned long nsecs)
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{
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return nsecs / 1000;
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@@ -579,9 +594,10 @@ static ssize_t trace_seq_to_buffer(struct trace_seq *s, void *buf, size_t cnt)
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static arch_spinlock_t ftrace_max_lock =
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(arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED;
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+unsigned long __read_mostly tracing_thresh;
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+
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#ifdef CONFIG_TRACER_MAX_TRACE
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unsigned long __read_mostly tracing_max_latency;
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-unsigned long __read_mostly tracing_thresh;
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/*
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* Copy the new maximum trace into the separate maximum-trace
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@@ -592,7 +608,7 @@ static void
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__update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu)
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{
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struct trace_array_cpu *data = tr->data[cpu];
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- struct trace_array_cpu *max_data = tr->data[cpu];
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+ struct trace_array_cpu *max_data;
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max_tr.cpu = cpu;
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max_tr.time_start = data->preempt_timestamp;
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@@ -602,7 +618,7 @@ __update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu)
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max_data->critical_start = data->critical_start;
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max_data->critical_end = data->critical_end;
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- memcpy(data->comm, tsk->comm, TASK_COMM_LEN);
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+ memcpy(max_data->comm, tsk->comm, TASK_COMM_LEN);
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max_data->pid = tsk->pid;
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max_data->uid = task_uid(tsk);
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max_data->nice = tsk->static_prio - 20 - MAX_RT_PRIO;
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@@ -4249,10 +4265,10 @@ static __init int tracer_init_debugfs(void)
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#ifdef CONFIG_TRACER_MAX_TRACE
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trace_create_file("tracing_max_latency", 0644, d_tracer,
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&tracing_max_latency, &tracing_max_lat_fops);
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+#endif
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trace_create_file("tracing_thresh", 0644, d_tracer,
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&tracing_thresh, &tracing_max_lat_fops);
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-#endif
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trace_create_file("README", 0444, d_tracer,
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NULL, &tracing_readme_fops);
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