[PATCH 6/6] track redirty_tail() calls

Fengguang Wu
2007-08-12T09:21:33Z

[-- Attachment #1: redirty-debug.patch --]
[-- Type: text/plain, Size: 1209 bytes --]

It helps a lot to know how redirty_tail() are called.

Signed-off-by: Fengguang Wu <wfg@mail.ustc.edu.cn>
---
fs/fs-writeback.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)

--- linux-2.6.23-rc2-mm2.orig/fs/fs-writeback.c
+++ linux-2.6.23-rc2-mm2/fs/fs-writeback.c
@@ -210,6 +210,11 @@ static int write_inode(struct inode *ino
return 0;
}

+#define redirty_tail(inode) \
+ do { \
+ __redirty_tail(inode, __LINE__); \
+ } while (0)
+
/*
* Redirty an inode: set its when-it-was dirtied timestamp and move it to the
* furthest end of its superblock's dirty-inode list.
@@ -219,11 +224,14 @@ static int write_inode(struct inode *ino
* the case then the inode must have been redirtied while it was being written
* out and we don't reset its dirtied_when.
*/
-static void redirty_tail(struct inode *inode)
+static void __redirty_tail(struct inode *inode, int line)
{
struct super_block *sb = inode->i_sb;

check_dirty_inode(inode);
+ if (unlikely(sysctl_inode_debug))
+ printk(KERN_DEBUG "redirtied inode %lu line %d\n",
+ inode->i_ino, line);
inode->dirtied_when = jiffies;
list_move(&inode->i_list, &sb->s_dirty);
check_dirty_inode(inode);

--