From owner-freebsd-hackers@FreeBSD.ORG  Thu Apr 29 11:34:45 2010
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 5442F1065670
	for <freebsd-hackers@freebsd.org>; Thu, 29 Apr 2010 11:34:45 +0000 (UTC)
	(envelope-from iputsikau@gmail.com)
Received: from mail-pv0-f182.google.com (mail-pv0-f182.google.com
	[74.125.83.182])
	by mx1.freebsd.org (Postfix) with ESMTP id 2EB578FC12
	for <freebsd-hackers@freebsd.org>; Thu, 29 Apr 2010 11:34:44 +0000 (UTC)
Received: by pvg11 with SMTP id 11so168564pvg.13
	for <freebsd-hackers@freebsd.org>; Thu, 29 Apr 2010 04:34:40 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma;
	h=domainkey-signature:mime-version:received:received:date:message-id
	:subject:from:to:content-type;
	bh=XT61SVJ8fUMNktID8508yOjxj4ov7Zpsn0voAEN8Wvs=;
	b=tYOAbB7poWrywTJtAFM85MbtPiYE1AIzY8pLN0aX2KVCJHhrzLeySoIGlPCDkj40FJ
	c3Vc5ueDWjloJCONpswdvGdRD8g2oF2zQKqI5ShlyzNjFUV5ssKPWhMLKj2DfTXestcr
	tcJtEhy9WX3XeNCH6LVQPyxMtHn6q+Up63K+o=
DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma;
	h=mime-version:date:message-id:subject:from:to:content-type;
	b=HDEHs5PVHrcF7JqEP8vWCBsj+7N4ZFoDheoJIjcHylV49qdkuYmL4SfT3xW1k+HLS8
	vi4xwczcAKpmgKgVODIUvhNvNmGbNvEruup51xkHk1GE1hMNwjOxSoSTTXZYdv7OuHCs
	fcwTFW+DNcgnAb6WJBb+SnCJ/pPyM9te+paTY=
MIME-Version: 1.0
Received: by 10.141.213.27 with SMTP id p27mr9274550rvq.155.1272539104282; 
	Thu, 29 Apr 2010 04:05:04 -0700 (PDT)
Received: by 10.141.42.14 with HTTP; Thu, 29 Apr 2010 04:05:04 -0700 (PDT)
Date: Thu, 29 Apr 2010 14:05:04 +0300
Message-ID: <x2id0c833b41004290405hd9e6692fi5930cdf9f2a981cb@mail.gmail.com>
From: Ilya Putsikau <iputsikau@gmail.com>
To: freebsd-hackers@freebsd.org
Content-Type: text/plain; charset=UTF-8
Subject: GSoC: File system changes notification
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 29 Apr 2010 11:34:45 -0000

Hi all,

This summer I'll add file system notification mechanism that works
around limitations of kevent. It has the same limitation as Linux'
dnotify once had: file or directory should be opened to monitor
changes, preventing file system unmounting. Most of the applications
in FreeBSD currently use polling because of this limitation (gamin,
kde).

I'll reuse existing kevent framework by attaching kevent listeners to
vnodes on creation, implementation is to be kernel level, have user
level inotify API compatibility and can be used to implement inotify
support in linuxulator.