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ftrace: cleanups

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factor out code and clean it up.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Ingo Molnar
2008-05-12 21:20:45 +02:00
committed by Thomas Gleixner
parent 60a11774b3
commit c7aafc5497
7 changed files with 136 additions and 105 deletions
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36
kernel/trace/trace_irqsoff.c
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@@ -144,7 +144,7 @@ check_critical_timing(struct trace_array *tr,
if (!report_latency(delta))
goto out;
spin_lock(&max_trace_lock);
spin_lock_irqsave(&max_trace_lock, flags);
/* check if we are still the max latency */
if (!report_latency(delta))
@@ -165,32 +165,24 @@ check_critical_timing(struct trace_array *tr,
update_max_tr_single(tr, current, cpu);
if (tracing_thresh)
printk(KERN_INFO "(%16s-%-5d|#%d): %lu us critical section "
"violates %lu us threshold.\n"
" => started at timestamp %lu: ",
current->comm, current->pid,
raw_smp_processor_id(),
latency, nsecs_to_usecs(tracing_thresh), t0);
else
if (tracing_thresh) {
printk(KERN_INFO "(%16s-%-5d|#%d):"
" new %lu us maximum-latency "
"critical section.\n => started at timestamp %lu: ",
" %lu us critical section violates %lu us threshold.\n",
current->comm, current->pid,
raw_smp_processor_id(),
latency, t0);
print_symbol(KERN_CONT "<%s>\n", data->critical_start);
printk(KERN_CONT " => ended at timestamp %lu: ", t1);
print_symbol(KERN_CONT "<%s>\n", data->critical_end);
dump_stack();
t1 = nsecs_to_usecs(now(cpu));
printk(KERN_CONT " => dump-end timestamp %lu\n\n", t1);
latency, nsecs_to_usecs(tracing_thresh));
} else {
printk(KERN_INFO "(%16s-%-5d|#%d):"
" new %lu us maximum-latency critical section.\n",
current->comm, current->pid,
raw_smp_processor_id(),
latency);
}
max_sequence++;
out_unlock:
spin_unlock(&max_trace_lock);
spin_unlock_irqrestore(&max_trace_lock, flags);
out:
data->critical_sequence = max_sequence;
@@ -216,7 +208,7 @@ start_critical_timing(unsigned long ip, unsigned long parent_ip)
cpu = raw_smp_processor_id();
data = tr->data[cpu];
if (unlikely(!data) || unlikely(!data->trace) ||
if (unlikely(!data) || unlikely(!head_page(data)) ||
atomic_read(&data->disabled))
return;
@@ -256,7 +248,7 @@ stop_critical_timing(unsigned long ip, unsigned long parent_ip)
cpu = raw_smp_processor_id();
data = tr->data[cpu];
if (unlikely(!data) || unlikely(!data->trace) ||
if (unlikely(!data) || unlikely(!head_page(data)) ||
!data->critical_start || atomic_read(&data->disabled))
return;