From owner-freebsd-current@FreeBSD.ORG Mon Apr 3 20:34:10 2006 Return-Path: X-Original-To: current@freebsd.org Delivered-To: freebsd-current@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id CB28916A400; Mon, 3 Apr 2006 20:34:10 +0000 (UTC) (envelope-from kris@obsecurity.org) Received: from elvis.mu.org (elvis.mu.org [192.203.228.196]) by mx1.FreeBSD.org (Postfix) with ESMTP id 0AF0143D73; Mon, 3 Apr 2006 20:34:04 +0000 (GMT) (envelope-from kris@obsecurity.org) Received: from obsecurity.dyndns.org (elvis.mu.org [192.203.228.196]) by elvis.mu.org (Postfix) with ESMTP id E313B1A3C25; Mon, 3 Apr 2006 13:34:03 -0700 (PDT) Received: by obsecurity.dyndns.org (Postfix, from userid 1000) id 37D3A54A79; Mon, 3 Apr 2006 16:34:03 -0400 (EDT) Date: Mon, 3 Apr 2006 16:34:03 -0400 From: Kris Kennaway To: Peter Holm Message-ID: <20060403203402.GA89233@xor.obsecurity.org> References: <20060402094431.GA81954@peter.osted.lan> <20060402.180153.74658240.Tor.Egge@cvsup.no.freebsd.org> <20060402190910.GA12759@peter.osted.lan> <20060402.204851.78799557.Tor.Egge@cvsup.no.freebsd.org> <20060403192808.GA91475@peter.osted.lan> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="sdtB3X0nJg68CQEu" Content-Disposition: inline In-Reply-To: <20060403192808.GA91475@peter.osted.lan> User-Agent: Mutt/1.4.2.1i Cc: truckman@freebsd.org, current@freebsd.org Subject: Re: Livelock / softdep_flush "loop" X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 03 Apr 2006 20:34:10 -0000 --sdtB3X0nJg68CQEu Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Apr 03, 2006 at 09:28:08PM +0200, Peter Holm wrote: > On Sun, Apr 02, 2006 at 08:48:51PM +0000, Tor Egge wrote: > > > > The enclosed patch might help. > > > >=20 > > >=20 > > > I'm testing it right now. > >=20 > > Similarly to the softdepflush process looping in softdep_flush(), the p= rocess > > creating a snapshot might loop in ffs_sync(). > >=20 >=20 > I ran the same test with your first patch for two hours and your > second patch for 7 hours, without seeing any livelocks. >=20 > I added snapshots to the test and still did not get any livelocks, but > I'm not certain that this last test covers your change. Hmm, there is a PR reporting hangs when removing many files with snapshots enabled, on 6.0. I tried to reproduce it on 6.1 but failed with the test case that the PR said was a reliable cause for them, so I assumed it was fixed. It may be that I didn't try hard enough though, since I didn't see your problem either. Kris --sdtB3X0nJg68CQEu Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2.2 (FreeBSD) iD8DBQFEMYa6Wry0BWjoQKURAr6DAKD5iGz6aYO5LNPlgFj4RixFonaJfQCgt3S3 gut18DnWCkJsG6rmLzp6wx8= =hHdh -----END PGP SIGNATURE----- --sdtB3X0nJg68CQEu--