From owner-svn-src-head@FreeBSD.ORG Mon May 30 13:07:59 2011 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 46D15106566C; Mon, 30 May 2011 13:07:59 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from mail.zoral.com.ua (mx0.zoral.com.ua [91.193.166.200]) by mx1.freebsd.org (Postfix) with ESMTP id B41298FC0A; Mon, 30 May 2011 13:07:57 +0000 (UTC) Received: from deviant.kiev.zoral.com.ua (root@deviant.kiev.zoral.com.ua [10.1.1.148]) by mail.zoral.com.ua (8.14.2/8.14.2) with ESMTP id p4UD7pYP049138 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Mon, 30 May 2011 16:07:51 +0300 (EEST) (envelope-from kostikbel@gmail.com) Received: from deviant.kiev.zoral.com.ua (kostik@localhost [127.0.0.1]) by deviant.kiev.zoral.com.ua (8.14.4/8.14.4) with ESMTP id p4UD7poe085907; Mon, 30 May 2011 16:07:51 +0300 (EEST) (envelope-from kostikbel@gmail.com) Received: (from kostik@localhost) by deviant.kiev.zoral.com.ua (8.14.4/8.14.4/Submit) id p4UD7pHt085906; Mon, 30 May 2011 16:07:51 +0300 (EEST) (envelope-from kostikbel@gmail.com) X-Authentication-Warning: deviant.kiev.zoral.com.ua: kostik set sender to kostikbel@gmail.com using -f Date: Mon, 30 May 2011 16:07:51 +0300 From: Kostik Belousov To: Robert Watson Message-ID: <20110530130751.GV48734@deviant.kiev.zoral.com.ua> References: <201105292113.p4TLDrA3046886@svn.freebsd.org> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="ESod/vG06iFAbj33" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.3i X-Virus-Scanned: clamav-milter 0.95.2 at skuns.kiev.zoral.com.ua X-Virus-Status: Clean X-Spam-Status: No, score=-3.3 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00, DNS_FROM_OPENWHOIS autolearn=no version=3.2.5 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on skuns.kiev.zoral.com.ua Cc: svn-src-head@freebsd.org, Rick Macklem , svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r222466 - head/sbin/umount X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 30 May 2011 13:07:59 -0000 --ESod/vG06iFAbj33 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, May 30, 2011 at 01:48:53PM +0100, Robert Watson wrote: > On Sun, 29 May 2011, Rick Macklem wrote: >=20 > > Modify the umount(8) command so that it doesn't do > > a sync(2) syscall before unmount(2) for the "-f" case. > > This avoids a forced dismount from getting stuck for > > an NFS mountpoint in sync() when the server is not > > responsive. With this commit, forced dismounts should > > normally work for the NFS clients, but can take up to > > about 1minute to complete. >=20 > I'm actually a bit confused about why umount(8) calls sync(2) at all:=20 > surely it's the responsibility of the file system, rather than the userla= nd=20 > tool, to ensure consistency subject to file system configuration and=20 > unmount-time flags? This call is from the same department as triple-sync before reboot, IMO. --ESod/vG06iFAbj33 Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (FreeBSD) iEYEARECAAYFAk3jlqYACgkQC3+MBN1Mb4indgCgiMHk6ZWSIxLfz0jIPmCMLuGp VfcAn3Q+6CJGGt0CQ3CjYpr7KiSWDw8L =83zU -----END PGP SIGNATURE----- --ESod/vG06iFAbj33--