It helps a lot to know how redirty_tail() are called.
Signed-off-by: Fengguang Wu <wfg@xxxxxxxxxxxxxxxx>
---
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);
--
-
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