Date: Mon, 1 Dec 2008 13:29:53 +0530
From: Bharata B Rao <bharata@linux.vnet.ibm.com>
To: Miklos Szeredi <miklos@szeredi.hu>
Cc: linux-fsdevel@vger.kernel.org, jblunck@suse.de, dlezcano@fr.ibm.com,
       linux-kernel@vger.kernel.org, viro@ZenIV.linux.org.uk
Subject: Re: [rfc git patch] union directory
Message-ID: <20081201075953.GE3388@in.ibm.com>
Reply-To: bharata@linux.vnet.ibm.com
References: <E1L616K-0005v3-Uc@pomaz-ex.szeredi.hu> <20081128161921.GA3843@in.ibm.com> <E1L6Skx-0007uK-3H@pomaz-ex.szeredi.hu> <20081201043509.GA3388@in.ibm.com>
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On Mon, Dec 01, 2008 at 10:05:09AM +0530, Bharata B Rao wrote:
> On Sat, Nov 29, 2008 at 05:33:19PM +0100, Miklos Szeredi wrote:
> > On Fri, 28 Nov 2008, Bharata B Rao wrote:
> > 
> > The plan is to get a simple kernel implementation first which caches
> > the directory in 'struct file'.
> 
> FYI, I did this for a version of Union Mount.
> (http://lkml.org/lkml/2007/6/20/21) I was maintaining the readdir cache in
> struct file and the cache was persistant across readdir calls.
> 
> Do you have anything different in mind ?

The version pointed to by me above had the entire cache stored
in the struct file of the topmost directory. I guess your plan
is to cache them per branch and combine them during
readdir()/getdents() ?

Regards,
Bharata.
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