[Ocfs2-devel] [PATCH] Track negative dentries

[Goldwyn Rodrigues]

On Sun, Jun 20, 2010 at 11:27 PM, Wengang Wang <wen.gang.wang at oracle.com> wrote:
> Hi Goldwyn,
>
> Has you ever test the hit race?

Yes, I tested it before posting.

> Actually I also wrote the codes locally monthes ago. When I was testing it,
> I found the dentry are different memory objects. For example, fileA is not
> exist, we issue a command of 'ls -l /path/to/fileA', At the first run, set
> parent ino to dentry. At the second run, the parent ino is not there. By
> printing the address, I found the two dentries are different ones though
> they are both for "fileA".

What you might be hitting is reuse of negative dentries. IOW,
conversion of negative dentries into positve dentries. I have handled
that. I did not printk pointers but did print generation numbers and
they looked fine. However, I did not encounter a case with a negative
dentry with a misplaced or a null d_parent.

-- 
Goldwyn