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author | Li Zefan <lizf@cn.fujitsu.com> | 2009-08-31 08:49:41 (GMT) |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2009-08-31 08:58:08 (GMT) |
commit | 8e254c1d183f0225ad21f9049641529e56cce4da (patch) | |
tree | 5b559726a38b60c6bc92b3c8667c676db1038701 /include/trace | |
parent | 73222acf966792c7fda219724af963339be32e62 (diff) | |
download | linux-fsl-qoriq-8e254c1d183f0225ad21f9049641529e56cce4da.tar.xz |
tracing/filters: Defer pred allocation
init_preds() allocates about 5392 bytes of memory (on x86_32) for
a TRACE_EVENT. With my config, at system boot total memory occupied
is:
5392 * (642 + 15) == 3459KB
642 == cat available_events | wc -l
15 == number of dirs in events/ftrace
That's quite a lot, so we'd better defer memory allocation util
it's needed, that's when filter is used.
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
LKML-Reference: <4A9B8EA5.6020700@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/trace')
-rw-r--r-- | include/trace/ftrace.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h index 57c56a9..bfbc842 100644 --- a/include/trace/ftrace.h +++ b/include/trace/ftrace.h @@ -622,7 +622,6 @@ static int ftrace_raw_init_event_##call(void) \ return -ENODEV; \ event_##call.id = id; \ INIT_LIST_HEAD(&event_##call.fields); \ - init_preds(&event_##call); \ return 0; \ } \ \ |