linux-kernel - Re: Thinking outside the box on file systems

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Message-ID: <1814.1187285475@turing-police.cc.vt.edu>
Date:	Thu, 16 Aug 2007 13:31:15 -0400
From:	Valdis.Kletnieks@...edu
To:	Phillip Susi <psusi@....rr.com>
Cc:	Kyle Moffett <mrmacman_g4@....com>,
	Michael Tharp <gxti@...tiallystapled.com>,
	alan <alan@...eserver.org>, Marc Perkel <mperkel@...oo.com>,
	LKML Kernel <linux-kernel@...r.kernel.org>,
	Lennart Sorensen <lsorense@...lub.uwaterloo.ca>,
	Al Viro <viro@...iv.linux.org.uk>
Subject: Re: Thinking outside the box on file systems

On Thu, 16 Aug 2007 13:28:26 EDT, Phillip Susi said:
> Valdis.Kletnieks@...edu wrote:
> > What happens if I do a 'mv /home /home1'?  Looks like more than a "relatively
> > small" number.  A cold-cache 'find' takes a few minutes to wade through it all,
> > so any solutions you come up with should beware of locking issues...
> 
> Then the directory is moved.... one dentry on disk needs changed to 
> reflect the new name.

That's how it works *now*.

That's *not* what happens with Marc's "Out of Box filesystem", because you need
to deal with the fact that the pathnames to everything under it just changed.

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