linux-kernel - Re: [PATCH v4 5/7] f2fs: add tracepoints to debug the block allocation & fallocate

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Date:	Tue, 23 Apr 2013 19:40:07 +0900
From:	Jaegeuk Kim <jaegeuk.kim@...sung.com>
To:	Namjae Jeon <linkinjeon@...il.com>
Cc:	rostedt@...dmis.org, linux-f2fs-devel@...ts.sourceforge.net,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	Namjae Jeon <namjae.jeon@...sung.com>,
	Pankaj Kumar <pankaj.km@...sung.com>
Subject: Re: [PATCH v4 5/7] f2fs: add tracepoints to debug the block allocation
 & fallocate

From c01e285324793a86c2c90c8451ed6feb04b3d310 Mon Sep 17 00:00:00 2001
From: Namjae Jeon <namjae.jeon@...sung.com>
Date: Tue, 23 Apr 2013 17:00:52 +0900
Subject: [PATCH 5/7] f2fs: add tracepoints to debug the block allocation
Cc: linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-f2fs-devel@...ts.sourceforge.net

Add tracepoints to debug the block allocation & fallocate.

Signed-off-by: Namjae Jeon <namjae.jeon@...sung.com>
Signed-off-by: Pankaj Kumar <pankaj.km@...sung.com>
Acked-by: Steven Rostedt <rostedt@...dmis.org>
[Jaegeuk: enhance information]
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@...sung.com>
---
 fs/f2fs/data.c              |  2 ++
 fs/f2fs/file.c              |  1 +
 include/trace/events/f2fs.h | 64
+++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 67 insertions(+)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 8e8b14d..1220b5c 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -55,6 +55,8 @@ int reserve_new_block(struct dnode_of_data *dn)
 	if (!inc_valid_block_count(sbi, dn->inode, 1))
 		return -ENOSPC;
 
+	trace_f2fs_reserve_new_block(dn->inode, dn->nid, dn->ofs_in_node);
+
 	__set_data_blkaddr(dn, NEW_ADDR);
 	dn->data_blkaddr = NEW_ADDR;
 	sync_inode_page(dn);
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 71efa37..0e56db2 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -546,6 +546,7 @@ static long f2fs_fallocate(struct file *file, int
mode,
 		inode->i_mtime = inode->i_ctime = CURRENT_TIME;
 		mark_inode_dirty(inode);
 	}
+	trace_f2fs_fallocate(inode, mode, offset, len, ret);
 	return ret;
 }
 
diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index 6f7cf7a..56b6240 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -514,6 +514,70 @@ TRACE_EVENT(f2fs_get_victim,
 		__entry->free)
 );
 
+TRACE_EVENT(f2fs_fallocate,
+
+	TP_PROTO(struct inode *inode, int mode,
+				loff_t offset, loff_t len, int ret),
+
+	TP_ARGS(inode, mode, offset, len, ret),
+
+	TP_STRUCT__entry(
+		__field(dev_t,	dev)
+		__field(ino_t,	ino)
+		__field(int,	mode)
+		__field(loff_t,	offset)
+		__field(loff_t,	len)
+		__field(loff_t, size)
+		__field(blkcnt_t, blocks)
+		__field(int,	ret)
+	),
+
+	TP_fast_assign(
+		__entry->dev	= inode->i_sb->s_dev;
+		__entry->ino	= inode->i_ino;
+		__entry->mode	= mode;
+		__entry->offset	= offset;
+		__entry->len	= len;
+		__entry->size	= inode->i_size;
+		__entry->blocks = inode->i_blocks;
+		__entry->ret	= ret;
+	),
+
+	TP_printk("dev = (%d,%d), ino = %lu, mode = %x, offset = %lld, "
+		"len = %lld,  i_size = %lld, i_blocks = %llu, ret = %d",
+		show_dev_ino(__entry),
+		__entry->mode,
+		(unsigned long long)__entry->offset,
+		(unsigned long long)__entry->len,
+		(unsigned long long)__entry->size,
+		(unsigned long long)__entry->blocks,
+		__entry->ret)
+);
+
+TRACE_EVENT(f2fs_reserve_new_block,
+
+	TP_PROTO(struct inode *inode, nid_t nid, unsigned int ofs_in_node),
+
+	TP_ARGS(inode, nid, ofs_in_node),
+
+	TP_STRUCT__entry(
+		__field(dev_t,	dev)
+		__field(nid_t, nid)
+		__field(unsigned int, ofs_in_node)
+	),
+
+	TP_fast_assign(
+		__entry->dev	= inode->i_sb->s_dev;
+		__entry->nid	= nid;
+		__entry->ofs_in_node = ofs_in_node;
+	),
+
+	TP_printk("dev = (%d,%d), nid = %u, ofs_in_node = %u",
+		show_dev(__entry),
+		(unsigned int)__entry->nid,
+		__entry->ofs_in_node)
+);
+
 #endif /* _TRACE_F2FS_H */
 
  /* This part must be outside protection */
-- 
1.8.1.3.566.gaa39828



-- 
Jaegeuk Kim
Samsung

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