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authorLi Zefan <lizf@cn.fujitsu.com>2009-05-21 01:59:18 -0400
committerFrederic Weisbecker <fweisbec@gmail.com>2009-05-25 18:15:21 -0400
commitb0aae68cc5508f3c2fbf728988c954db4c8b8a53 (patch)
treeaf1253c54cf3edc83806acab14a60d1529e81709 /include
parent4f5359685af6de7dca101393dc606620adbe963f (diff)
tracing/events: change the type of __str_loc_item to unsigned short
When defining a dynamic size string, we add __str_loc_##item to the trace entry, and it stores the location of the actual string in entry->_str_data[] 'unsigned short' should be sufficient to store this information, thus we save 2 bytes per dyn-size string in the ring buffer. [ Impact: reduce memory occupied by dyn-size strings in ring buffer ] Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <4A14EDB6.2050507@cn.fujitsu.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Diffstat (limited to 'include')
-rw-r--r--include/trace/ftrace.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
index edb02bc9f8ff..b5ff2e8229ec 100644
--- a/include/trace/ftrace.h
+++ b/include/trace/ftrace.h
@@ -25,7 +25,7 @@
25#define __field(type, item) type item; 25#define __field(type, item) type item;
26 26
27#undef __string 27#undef __string
28#define __string(item, src) int __str_loc_##item; 28#define __string(item, src) unsigned short __str_loc_##item;
29 29
30#undef TP_STRUCT__entry 30#undef TP_STRUCT__entry
31#define TP_STRUCT__entry(args...) args 31#define TP_STRUCT__entry(args...) args