Re: [PATCH] fs:lock_rename()/unlock_rename() can lead to deadlock in distributed fs.

[Christoph Hellwig <hch@infradead.org>]

On Mon, Jun 27, 2005 at 11:24:49AM +0200, Zuzana Petrova wrote:
> When lock_rename(new_dir, old_dir) is called, the dentries don't match, so we  
> end up in a code path that tries to acquire the inode i_sem of both the  
> old_dir and new_dir, but since they point to the same inode, the second  
> attempt to acquire the same i_sem results in a deadlock.  
>   
> A fix would be to compare the dentries ->d_inode field instead.  Patch for  
> kernel 2.6.12.1 attached.

No, that's bogus.  Make sure the filesystem never has multiple dentries
for the same directory inode.  
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