linux-kernel - Re: [PATCH 2/2] fat (exportfs): reconnect file handles to evicted inodes/dentries

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Message-ID: <1341845277.2215.10.camel@iscandar.digidescorp.com>
Date:	Mon, 09 Jul 2012 09:47:57 -0500
From:	"Steven J. Magnani" <steve@...idescorp.com>
To:	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] fat (exportfs): reconnect file handles to evicted
 inodes/dentries

On Mon, 2012-07-09 at 22:43 +0900, OGAWA Hirofumi wrote: 
> "Steven J. Magnani" <steve@...idescorp.com> writes:
> 
> >> We need the key, possible key is - if it is only directory, FAT may be
> >> able to use i_start as additional search key.
> >
> > Interesting idea. I think this, and reformulating the FAT NFS file
> > handle to include the parent's i_ino, will greatly simplify (and speed
> > up) the code.
> 
> Does it work even if the inode was rename()'ed?

AFAICT. I don't see why it wouldn't; on a rename, the inode's i_pos
changes but its i_ino stays the same, right?

Do you have any objection to making the use of a directory logstart
cache a mount option that defaults to off? It seems a shame to penalize
everyone - particularly embedded systems - with the overhead of such a
cache when FAT-backed-NFS seems to be such a small percentage of use
cases.

------------------------------------------------------------------------
Steven J. Magnani               "I claim this network for MARS!
www.digidescorp.com              Earthling, return my space modulator!"

#include <standard.disclaimer>

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