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Commit 63f92ddc authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

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: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent cf04e8eb

fs/f2fs/Kconfig

+10 −0
Original line number Diff line number Diff line
@@ -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.

fs/f2fs/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -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

fs/f2fs/trace.c

0 → 100644
+24 −0
Original line number Diff line number Diff line 
/*

 * 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)

{

}

fs/f2fs/trace.h

0 → 100644
+24 −0
Original line number Diff line number Diff line 
/*

 * 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__ */