diff options
| author | Ingo Molnar <mingo@elte.hu> | 2009-04-07 14:41:14 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-04-07 14:41:17 +0200 |
| commit | 86665c75da41889f92b774f31ea5a9a436f392a8 (patch) | |
| tree | 94b003ab677a64b7d0a6dcca1f636bbbc2a187c9 /kernel/trace/trace.c | |
| parent | 93776a8ec746cf9d32c36e5a5b23d28d8be28826 (diff) | |
| parent | 1bbe2a83ab68e5cf8c66c372c7cb3b51910c2cfe (diff) | |
Merge branch 'tracing/urgent' into tracing/ftrace
Diffstat (limited to 'kernel/trace/trace.c')
| -rw-r--r-- | kernel/trace/trace.c | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 2a81decf99bc..32653c8c6e26 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -30,6 +30,7 @@ #include <linux/percpu.h> #include <linux/splice.h> #include <linux/kdebug.h> +#include <linux/string.h> #include <linux/ctype.h> #include <linux/init.h> #include <linux/poll.h> @@ -147,8 +148,7 @@ static int __init set_ftrace_dump_on_oops(char *str) } __setup("ftrace_dump_on_oops", set_ftrace_dump_on_oops); -long -ns2usecs(cycle_t nsec) +unsigned long long ns2usecs(cycle_t nsec) { nsec += 500; do_div(nsec, 1000); @@ -1623,7 +1623,11 @@ static void test_cpu_buff_start(struct trace_iterator *iter) return; cpumask_set_cpu(iter->cpu, iter->started); - trace_seq_printf(s, "##### CPU %u buffer started ####\n", iter->cpu); + + /* Don't print started cpu buffer for the first entry of the trace */ + if (iter->idx > 1) + trace_seq_printf(s, "##### CPU %u buffer started ####\n", + iter->cpu); } static enum print_line_t print_trace_fmt(struct trace_iterator *iter) @@ -1858,6 +1862,11 @@ __tracing_open(struct inode *inode, struct file *file) if (current_trace) *iter->trace = *current_trace; + if (!alloc_cpumask_var(&iter->started, GFP_KERNEL)) + goto fail; + + cpumask_clear(iter->started); + if (current_trace && current_trace->print_max) iter->tr = &max_tr; else @@ -1908,6 +1917,7 @@ __tracing_open(struct inode *inode, struct file *file) if (iter->buffer_iter[cpu]) ring_buffer_read_finish(iter->buffer_iter[cpu]); } + free_cpumask_var(iter->started); fail: mutex_unlock(&trace_types_lock); kfree(iter->trace); @@ -1951,6 +1961,7 @@ static int tracing_release(struct inode *inode, struct file *file) seq_release(inode, file); mutex_destroy(&iter->mutex); + free_cpumask_var(iter->started); kfree(iter->trace); kfree(iter); return 0; @@ -2349,9 +2360,9 @@ static const char readme_msg[] = "# mkdir /debug\n" "# mount -t debugfs nodev /debug\n\n" "# cat /debug/tracing/available_tracers\n" - "wakeup preemptirqsoff preemptoff irqsoff ftrace sched_switch none\n\n" + "wakeup preemptirqsoff preemptoff irqsoff function sched_switch nop\n\n" "# cat /debug/tracing/current_tracer\n" - "none\n" + "nop\n" "# echo sched_switch > /debug/tracing/current_tracer\n" "# cat /debug/tracing/current_tracer\n" "sched_switch\n" |