linux-kernel - [PATCH 2/3] f2fs: add a tracepoint on f2fs_new

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Date:	Thu, 25 Apr 2013 20:01:36 +0900
From:	Jaegeuk Kim <jaegeuk.kim@...sung.com>
To:	unlisted-recipients:; (no To-header on input)
Cc:	Jaegeuk Kim <jaegeuk.kim@...sung.com>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net
Subject: [PATCH 2/3] f2fs: add a tracepoint on f2fs_new_inode

This can help when debugging the free nid allocation flows.

Signed-off-by: Jaegeuk Kim <jaegeuk.kim@...sung.com>
---
 fs/f2fs/namei.c             | 3 ++-
 include/trace/events/f2fs.h | 7 +++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index c57fd18..4aa26e5 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -63,7 +63,7 @@ static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)
 		nid_free = true;
 		goto out;
 	}
-
+	trace_f2fs_new_inode(inode, 0);
 	mark_inode_dirty(inode);
 	return inode;
 
@@ -71,6 +71,7 @@ out:
 	clear_nlink(inode);
 	unlock_new_inode(inode);
 fail:
+	trace_f2fs_new_inode(inode, err);
 	iput(inode);
 	if (nid_free)
 		alloc_nid_failed(sbi, ino);
diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index b2b2f72..52ae548 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -197,6 +197,13 @@ DEFINE_EVENT(f2fs__inode, f2fs_evict_inode,
 	TP_ARGS(inode)
 );
 
+DEFINE_EVENT(f2fs__inode_exit, f2fs_new_inode,
+
+	TP_PROTO(struct inode *inode, int ret),
+
+	TP_ARGS(inode, ret)
+);
+
 TRACE_EVENT(f2fs_unlink_enter,
 
 	TP_PROTO(struct inode *dir, struct dentry *dentry),
-- 
1.8.1.3.566.gaa39828

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