[Ocfs2-devel] [PATCH] Track negative entries v3

[Joel Becker]

On Mon, Jun 28, 2010 at 10:04:32AM -0500, Goldwyn Rodrigues wrote:
> Track negative dentries by recording the generation number of the parent
> directory in d_fsdata. The generation number for the parent directory is
> recorded in the inode_info, which increments every time the lock on the
> directory is dropped.
> 
> If the generation number of the parent directory and the negative dentry
> matches, there is no need to perform the revalidate, else a revalidate
> is forced. This improves performance in situations where nodes look for
> the same non-existent file multiple times.
> 
> Thanks Mark for explaining the DLM sequence.
> 
> Signed-off-by: Goldwyn Rodrigues <rgoldwyn at suse.de>

	This patch is now in the merge-window branch of ocfs2.git.

Joel

-- 

"Not everything that can be counted counts, and not everything
 that counts can be counted."
        - Albert Einstein 

Joel Becker
Consulting Software Developer
Oracle
E-mail: joel.becker at oracle.com
Phone: (650) 506-8127