f2fs: add f2fs_io_tracer support
This patch adds:
o initial trace.c and trace.h with skeleton functions
o Kconfig and Makefile to activate this feature
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/Kconfig b/fs/f2fs/Kconfig
index 736a348..94e2d2f 100644
--- a/fs/f2fs/Kconfig
+++ b/fs/f2fs/Kconfig
@@ -71,3 +71,13 @@
Enables BUG_ONs which check the filesystem consistency in runtime.
If you want to improve the performance, say N.
+
+config F2FS_IO_TRACE
+ bool "F2FS IO tracer"
+ depends on F2FS_FS
+ depends on FUNCTION_TRACER
+ help
+ F2FS IO trace is based on a function trace, which gathers process
+ information and block IO patterns in the filesystem level.
+
+ If unsure, say N.