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>
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@ -71,3 +71,13 @@ config F2FS_CHECK_FS
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Enables BUG_ONs which check the filesystem consistency in runtime.
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Enables BUG_ONs which check the filesystem consistency in runtime.
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If you want to improve the performance, say N.
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If you want to improve the performance, say N.
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config F2FS_IO_TRACE
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bool "F2FS IO tracer"
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depends on F2FS_FS
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depends on FUNCTION_TRACER
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help
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F2FS IO trace is based on a function trace, which gathers process
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information and block IO patterns in the filesystem level.
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If unsure, say N.
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@ -5,3 +5,4 @@ f2fs-y += checkpoint.o gc.o data.o node.o segment.o recovery.o
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f2fs-$(CONFIG_F2FS_STAT_FS) += debug.o
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f2fs-$(CONFIG_F2FS_STAT_FS) += debug.o
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f2fs-$(CONFIG_F2FS_FS_XATTR) += xattr.o
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f2fs-$(CONFIG_F2FS_FS_XATTR) += xattr.o
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f2fs-$(CONFIG_F2FS_FS_POSIX_ACL) += acl.o
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f2fs-$(CONFIG_F2FS_FS_POSIX_ACL) += acl.o
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f2fs-$(CONFIG_F2FS_IO_TRACE) += trace.o
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@ -0,0 +1,24 @@
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/*
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* f2fs IO tracer
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*
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* Copyright (c) 2014 Motorola Mobility
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* Copyright (c) 2014 Jaegeuk Kim <jaegeuk@kernel.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/fs.h>
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#include <linux/f2fs_fs.h>
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#include <linux/sched.h>
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#include "f2fs.h"
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#include "trace.h"
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void f2fs_trace_pid(struct page *page)
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{
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}
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void f2fs_trace_ios(struct page *page, struct f2fs_io_info *fio, int flush)
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{
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}
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@ -0,0 +1,24 @@
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/*
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* f2fs IO tracer
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*
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* Copyright (c) 2014 Motorola Mobility
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* Copyright (c) 2014 Jaegeuk Kim <jaegeuk@kernel.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __F2FS_TRACE_H__
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#define __F2FS_TRACE_H__
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#ifdef CONFIG_F2FS_IO_TRACE
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#include <trace/events/f2fs.h>
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extern void f2fs_trace_pid(struct page *);
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extern void f2fs_trace_ios(struct page *, struct f2fs_io_info *, int);
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#else
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#define f2fs_trace_pid(p)
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#define f2fs_trace_ios(p, i, n)
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#endif
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#endif /* __F2FS_TRACE_H__ */
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