The guts of stat cache.

[Jeremy Allison]

On Tue, Mar 19, 2013 at 05:22:37PM -0500, Christopher R. Hertel wrote:
> 
> So it's not replaceable from within a VFS module (augmentable, perhaps, but
> not replaceable).

Yep.

> ...which means that it has to look at what's on disk.  I assume that it
> caches that disk-based info so that the look-up is done internally so that
> we can reduce the number of times we go to disk.

Yep.

> In which case, I'm confused as to why I see stat calls repeated.  I've
> written a very simple VFS module that logs calls to the vfs .stat function,
> and I see repeated calls on the same name (and variations of the name).

Look at what the client is asking for. Even if we get a match we
still need to do the stat() to ensure the name is valid.

Jeremy.