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From: Jiri Olsa on 14 Apr 2010 09:10
hi,

adding option for control LOST EVENTS message output.

wbr,
jirka


Signed-off-by: Jiri Olsa <jolsa(a)redhat.com>
---
kernel/trace/trace.c | 7 +++++--
kernel/trace/trace.h | 1 +
2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 60f3b62..bf00438 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -332,7 +332,7 @@ static DECLARE_WAIT_QUEUE_HEAD(trace_wait);
/* trace_flags holds trace_options default values */
unsigned long trace_flags = TRACE_ITER_PRINT_PARENT | TRACE_ITER_PRINTK |
TRACE_ITER_ANNOTATE | TRACE_ITER_CONTEXT_INFO | TRACE_ITER_SLEEP_TIME |
- TRACE_ITER_GRAPH_TIME;
+ TRACE_ITER_GRAPH_TIME | TRACE_ITER_LOST_EVENTS;

static int trace_stop_count;
static DEFINE_SPINLOCK(tracing_start_lock);
@@ -416,6 +416,7 @@ static const char *trace_options[] = {
"latency-format",
"sleep-time",
"graph-time",
+ "lost-events",
NULL
};

@@ -2040,9 +2041,11 @@ static enum print_line_t print_trace_line(struct trace_iterator *iter)
{
enum print_line_t ret;

- if (iter->lost_events)
+ if ((trace_flags & TRACE_ITER_LOST_EVENTS) &&
+ (iter->lost_events)) {
trace_seq_printf(&iter->seq, "CPU:%d [LOST %lu EVENTS]\n",
iter->cpu, iter->lost_events);
+ }

if (iter->trace && iter->trace->print_line) {
ret = iter->trace->print_line(iter);
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index bec2c97..4607b43 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -606,6 +606,7 @@ enum trace_iterator_flags {
TRACE_ITER_LATENCY_FMT = 0x20000,
TRACE_ITER_SLEEP_TIME = 0x40000,
TRACE_ITER_GRAPH_TIME = 0x80000,
+ TRACE_ITER_LOST_EVENTS = 0x100000,
};

/*
--
1.6.6.1

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Prev: [PATCH 1/7] ext2: Use ext2_clear_super_error() in ext2_sync_fs()
Next: Irish 2010 Winner