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Date: Wed, 25 Jul 2007 14:28:24 -0700
From: "Ray Lee" <ray-lk@madrabbit.org>
To: "Zan Lynx" <zlynx@acm.org>
Subject: Re: -mm merge plans for 2.6.23
Cc: "Rene Herman" <rene.herman@gmail.com>, david@lang.hm,
       "Nick Piggin" <nickpiggin@yahoo.com.au>,
       "Jesper Juhl" <jesper.juhl@gmail.com>,
       "Andrew Morton" <akpm@linux-foundation.org>,
       "ck list" <ck@vds.kolivas.org>, "Ingo Molnar" <mingo@elte.hu>,
       "Paul Jackson" <pj@sgi.com>, linux-mm@kvack.org,
       linux-kernel@vger.kernel.org
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On 7/25/07, Zan Lynx <zlynx@acm.org> wrote:
> On Wed, 2007-07-25 at 09:02 -0700, Ray Lee wrote:
>
> > I'd just like updatedb to amortize its work better. If we had some way
> > to track all filesystem events, updatedb could keep a live and
> > accurate index on the filesystem. And this isn't just updatedb that
> > wants that, beagle and tracker et al also want to know filesystem
> > events so that they can index the documents themselves as well as the
> > metadata. And if they do it live, that spreads the cost out, including
> > the VM pressure.
>
> That would be nice.  It'd be great if there was a per-filesystem inotify
> mode.  I can't help but think it'd be more efficient than recursing
> every directory and adding a watch.
>
> Or maybe a netlink thing that could buffer events since filesystem mount
> until a daemon could get around to starting, so none were lost.

See "Filesystem Event Reporter" by Yi Yang, that does pretty much
exactly that. http://lkml.org/lkml/2006/9/30/98 . Author had things to
update, never resubmitted it as far as I can tell.

Ray