From c7aafc549766b87819285d3480648fc652a47bc4 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Mon, 12 May 2008 21:20:45 +0200 Subject: ftrace: cleanups factor out code and clean it up. Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- kernel/trace/trace_irqsoff.c | 32 ++++++++++++-------------------- 1 file changed, 12 insertions(+), 20 deletions(-) (limited to 'kernel/trace/trace_irqsoff.c') diff --git a/kernel/trace/trace_irqsoff.c b/kernel/trace/trace_irqsoff.c index 14183b8f79c5..2dfebb67fdfb 100644 --- a/kernel/trace/trace_irqsoff.c +++ b/kernel/trace/trace_irqsoff.c @@ -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: ", + if (tracing_thresh) { + printk(KERN_INFO "(%16s-%-5d|#%d):" + " %lu us critical section violates %lu us threshold.\n", current->comm, current->pid, raw_smp_processor_id(), - latency, nsecs_to_usecs(tracing_thresh), t0); - else + latency, nsecs_to_usecs(tracing_thresh)); + } else { printk(KERN_INFO "(%16s-%-5d|#%d):" - " new %lu us maximum-latency " - "critical section.\n => started at timestamp %lu: ", + " new %lu us maximum-latency critical section.\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); + } 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; -- cgit v1.2.3-59-g8ed1b