Re: [PATCH 0/4] dcache: make Oracle more scalable on large systems

From: Dave Chinner
Date: Thu Feb 21 2013 - 18:38:46 EST

On Tue, Feb 19, 2013 at 01:50:55PM -0500, Waiman Long wrote:
> It was found that the Oracle database software issues a lot of call
> to the seq_path() kernel function which translates a (dentry, mnt)
> pair to an absolute path. The seq_path() function will eventually
> take the following two locks:

Nobody should be doing reverse dentry-to-name lookups in a quantity
sufficient for it to become a performance limiting factor. What is
the Oracle DB actually using this path for?


Dave Chinner
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