From owner-freebsd-arch@FreeBSD.ORG  Sun Aug 21 10:27:21 2005
Return-Path: <owner-freebsd-arch@FreeBSD.ORG>
X-Original-To: arch@freebsd.org
Delivered-To: freebsd-arch@FreeBSD.ORG
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 5020316A41F;
	Sun, 21 Aug 2005 10:27:21 +0000 (GMT)
	(envelope-from ume@mahoroba.org)
Received: from ameno.mahoroba.org (gw4.mahoroba.org [218.45.22.175])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 4366343D5E;
	Sun, 21 Aug 2005 10:27:17 +0000 (GMT)
	(envelope-from ume@mahoroba.org)
Received: from kasuga.mahoroba.org
	(IDENT:mcApKJC6DYGNCGYHGRRVZVHahdRrbovVL+c+PvHnYW4GsHJt6SbaFOrcFwlsXk3F@kasuga.mahoroba.org
	[IPv6:3ffe:501:185b:8010:20b:97ff:fe2e:b521])
	(user=ume mech=CRAM-MD5 bits=0)
	by ameno.mahoroba.org (8.13.3/8.13.3) with ESMTP/inet6 id
	j7LAR8mZ020053
	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO);
	Sun, 21 Aug 2005 19:27:08 +0900 (JST)
	(envelope-from ume@mahoroba.org)
Date: Sun, 21 Aug 2005 19:27:07 +0900
Message-ID: <yge8xyvy490.wl%ume@mahoroba.org>
From: Hajimu UMEMOTO <ume@freebsd.org>
To: Alexander Leidinger <Alexander@Leidinger.net>
In-Reply-To: <20050821115454.55441a64@Magellan.Leidinger.net>
References: <ygefyt4yiaz.wl%ume@mahoroba.org>
	<20050821003536.P14178@fledge.watson.org>
	<20050821115454.55441a64@Magellan.Leidinger.net>
User-Agent: xcite1.38> Wanderlust/2.14.0 (Africa) SEMI/1.14.6 (Maruoka)
	FLIM/1.14.7 (=?ISO-8859-4?Q?Sanj=F2?=) APEL/10.6 Emacs/22.0.50
	(i386-unknown-freebsd6.0) MULE/5.0 (SAKAKI)
X-Operating-System: FreeBSD 6.0-BETA2
X-PGP-Key: http://www.imasy.or.jp/~ume/publickey.asc
X-PGP-Fingerprint: 1F00 0B9E 2164 70FC 6DC5  BF5F 04E9 F086 BF90 71FE
Organization: Internet Mutual Aid Society, YOKOHAMA
MIME-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka")
Content-Type: text/plain; charset=US-ASCII
X-Greylist: Sender succeeded SMTP AUTH authentication, not delayed by
	milter-greylist-2.0 (ameno.mahoroba.org
	[IPv6:3ffe:501:185b:8010::1]);
	Sun, 21 Aug 2005 19:27:08 +0900 (JST)
X-Virus-Scanned: by amavisd-new
X-Virus-Status: Clean
X-Spam-Status: No, score=-5.9 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 
	autolearn=ham version=3.0.4
X-Spam-Checker-Version: SpamAssassin 3.0.4 (2005-06-05) on ameno.mahoroba.org
Cc: arch@freebsd.org, Robert Watson <rwatson@freebsd.org>
Subject: Re: [CFR] reflect resolv.conf update to running application
X-BeenThere: freebsd-arch@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Discussion related to FreeBSD architecture <freebsd-arch.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-arch>,
	<mailto:freebsd-arch-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-arch>
List-Post: <mailto:freebsd-arch@freebsd.org>
List-Help: <mailto:freebsd-arch-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-arch>,
	<mailto:freebsd-arch-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 21 Aug 2005 10:27:21 -0000

Hi,

>>>>> On Sun, 21 Aug 2005 11:54:54 +0200
>>>>> Alexander Leidinger <Alexander@Leidinger.net> said:

Alexander> Can kqueue be used instead of polling?

It may be able to use kqueue.  However, I'm not sure how kevent() is
cheap than stat().  It requires holding a file descriptor for
monitoring change of resolv.conf.  The logic will be slightly
complicate, and it may cause memory leak.  So, unless there is
significant advantage to use kqueue, stat() is better here, IMHO.

Sincerely,

--
Hajimu UMEMOTO @ Internet Mutual Aid Society Yokohama, Japan
ume@mahoroba.org  ume@{,jp.}FreeBSD.org
http://www.imasy.org/~ume/