diff options
| author | Li Zefan <lizf@cn.fujitsu.com> | 2010-05-24 16:22:49 +0800 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2010-06-28 17:12:46 -0400 |
| commit | 8728fe501ed562c1b46dde3c195eadec77bca033 (patch) | |
| tree | c911b4a6af85817ba6bdf3342cbae4838c14b1bb /kernel/trace/trace_events_filter.c | |
| parent | c9642c49aae1272d7c24008a40ae614470b957a6 (diff) | |
tracing: Don't allocate common fields for every trace events
Every event has the same common fields, so it's a big waste of
memory to have a copy of those fields for every event.
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
LKML-Reference: <4BFA3759.30105@cn.fujitsu.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace_events_filter.c')
| -rw-r--r-- | kernel/trace/trace_events_filter.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c index 57bb1bb32999..330fefd1de1c 100644 --- a/kernel/trace/trace_events_filter.c +++ b/kernel/trace/trace_events_filter.c @@ -497,12 +497,10 @@ void print_subsystem_event_filter(struct event_subsystem *system, } static struct ftrace_event_field * -find_event_field(struct ftrace_event_call *call, char *name) +__find_event_field(struct list_head *head, char *name) { struct ftrace_event_field *field; - struct list_head *head; - head = trace_get_fields(call); list_for_each_entry(field, head, link) { if (!strcmp(field->name, name)) return field; @@ -511,6 +509,20 @@ find_event_field(struct ftrace_event_call *call, char *name) return NULL; } +static struct ftrace_event_field * +find_event_field(struct ftrace_event_call *call, char *name) +{ + struct ftrace_event_field *field; + struct list_head *head; + + field = __find_event_field(&ftrace_common_fields, name); + if (field) + return field; + + head = trace_get_fields(call); + return __find_event_field(head, name); +} + static void filter_free_pred(struct filter_pred *pred) { if (!pred) |