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authorLi Zefan <lizf@cn.fujitsu.com>2009-08-31 16:49:41 +0800
committerIngo Molnar <mingo@elte.hu>2009-08-31 10:58:08 +0200
commit8e254c1d183f0225ad21f9049641529e56cce4da (patch)
tree5b559726a38b60c6bc92b3c8667c676db1038701 /include/trace
parent73222acf966792c7fda219724af963339be32e62 (diff)
downloadlinux-8e254c1d183f0225ad21f9049641529e56cce4da.tar.bz2
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.h1
1 files changed, 0 insertions, 1 deletions
diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
index 57c56a998ee6..bfbc842600a1 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; \
} \
\