diff options
| author | Jaegeuk Kim | 2014-12-17 19:45:05 -0800 |
|---|---|---|
| committer | Jaegeuk Kim | 2015-01-09 17:02:24 -0800 |
| commit | 63f92ddc8aee18838441179064338702a93326a9 (patch) | |
| tree | 42cf7109edcebe2bebb8dca7f4419721a32231db | |
| parent | cf04e8eb55290c7b836c36f0b4e1a8d0fe8ee275 (diff) | |
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>
| -rw-r--r-- | fs/f2fs/Kconfig | 10 | ||||
| -rw-r--r-- | fs/f2fs/Makefile | 1 | ||||
| -rw-r--r-- | fs/f2fs/trace.c | 24 | ||||
| -rw-r--r-- | fs/f2fs/trace.h | 24 |
4 files changed, 59 insertions, 0 deletions
diff --git a/fs/f2fs/Kconfig b/fs/f2fs/Kconfig index 736a348509f7..94e2d2ffabe1 100644 --- a/fs/f2fs/Kconfig +++ b/fs/f2fs/Kconfig @@ -71,3 +71,13 @@ config F2FS_CHECK_FS 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. diff --git a/fs/f2fs/Makefile b/fs/f2fs/Makefile index 2e35da12d292..d92397731db8 100644 --- a/fs/f2fs/Makefile +++ b/fs/f2fs/Makefile @@ -5,3 +5,4 @@ f2fs-y += checkpoint.o gc.o data.o node.o segment.o recovery.o f2fs-$(CONFIG_F2FS_STAT_FS) += debug.o f2fs-$(CONFIG_F2FS_FS_XATTR) += xattr.o f2fs-$(CONFIG_F2FS_FS_POSIX_ACL) += acl.o +f2fs-$(CONFIG_F2FS_IO_TRACE) += trace.o diff --git a/fs/f2fs/trace.c b/fs/f2fs/trace.c new file mode 100644 index 000000000000..4e4a0691d32f --- /dev/null +++ b/fs/f2fs/trace.c @@ -0,0 +1,24 @@ +/* + * f2fs IO tracer + * + * Copyright (c) 2014 Motorola Mobility + * Copyright (c) 2014 Jaegeuk Kim <jaegeuk@kernel.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/fs.h> +#include <linux/f2fs_fs.h> +#include <linux/sched.h> + +#include "f2fs.h" +#include "trace.h" + +void f2fs_trace_pid(struct page *page) +{ +} + +void f2fs_trace_ios(struct page *page, struct f2fs_io_info *fio, int flush) +{ +} diff --git a/fs/f2fs/trace.h b/fs/f2fs/trace.h new file mode 100644 index 000000000000..08856a978d6b --- /dev/null +++ b/fs/f2fs/trace.h @@ -0,0 +1,24 @@ +/* + * f2fs IO tracer + * + * Copyright (c) 2014 Motorola Mobility + * Copyright (c) 2014 Jaegeuk Kim <jaegeuk@kernel.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef __F2FS_TRACE_H__ +#define __F2FS_TRACE_H__ + +#ifdef CONFIG_F2FS_IO_TRACE +#include <trace/events/f2fs.h> + +extern void f2fs_trace_pid(struct page *); +extern void f2fs_trace_ios(struct page *, struct f2fs_io_info *, int); +#else +#define f2fs_trace_pid(p) +#define f2fs_trace_ios(p, i, n) + +#endif +#endif /* __F2FS_TRACE_H__ */ |