From owner-freebsd-current@FreeBSD.ORG Sun Oct 15 17:11:54 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 ACF7816A403 for ; Sun, 15 Oct 2006 17:11:54 +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 C7A2943D67 for ; Sun, 15 Oct 2006 17:11:53 +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 AD7FF1A4D88; Sun, 15 Oct 2006 10:11:53 -0700 (PDT) Received: by obsecurity.dyndns.org (Postfix, from userid 1000) id 1669A51282; Sun, 15 Oct 2006 13:11:53 -0400 (EDT) Date: Sun, 15 Oct 2006 13:11:52 -0400 From: Kris Kennaway To: Sergey Zaharchenko Message-ID: <20061015171152.GA68129@xor.obsecurity.org> References: <20061015083511.GA13203@shark.localdomain> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="HcAYCG3uE/tztfnV" Content-Disposition: inline In-Reply-To: <20061015083511.GA13203@shark.localdomain> User-Agent: Mutt/1.4.2.2i Cc: current@freebsd.org Subject: Re: Processes in "ufs" state (PR kern/104406) 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: Sun, 15 Oct 2006 17:11:54 -0000 --HcAYCG3uE/tztfnV Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sun, Oct 15, 2006 at 12:35:11PM +0400, Sergey Zaharchenko wrote: > Hello list! >=20 > I've stumbled across this (probable) bug when doing some > number-crunching. Processes which try to access the filesystem hang at > some point when another process has been gobbling up CPU time for a > sufficiently long time. Interestingly, processes which have already > opened some files before the `hang' can apparently read/write them > without hindrance (iostat shows some disk activity). Interactive > processes run well too. When the number-cruncher is `kill -STOP'ped and > `kill -CONT'ed, everything runs well for another while. It's reliably > and frequently reproducible here both on recent and late August CURRENT, > the kernel is GENERIC, the hardware is basic (no RAID, etc.). >=20 > Could anyone experienced enough try to look into this and/or give advice > for debugging the problem? I have ddb available, but I'm not sure about > where to look. >=20 > http://www.freebsd.org/cgi/query-pr.cgi?pr=3D104406 I'm unable to reproduce so far. Kris --HcAYCG3uE/tztfnV Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (FreeBSD) iD8DBQFFMmvYWry0BWjoQKURAsGzAKChP2oSMoLpDWtP2W5+bexmwBNbdgCg4NzU DZjLqP3XceCCXyG1AeF764M= =Rwfs -----END PGP SIGNATURE----- --HcAYCG3uE/tztfnV--