From owner-freebsd-current@FreeBSD.ORG Thu Sep 15 21:39:24 2005 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 94D6F16A41F for ; Thu, 15 Sep 2005 21:39:24 +0000 (GMT) (envelope-from kris@obsecurity.org) Received: from fileserver.fields.utoronto.ca (fileserver.fields.utoronto.ca [128.100.216.10]) by mx1.FreeBSD.org (Postfix) with ESMTP id 2579B43D45 for ; Thu, 15 Sep 2005 21:39:24 +0000 (GMT) (envelope-from kris@obsecurity.org) Received: from fields.fields.utoronto.ca (fields.localdomain [192.168.216.11]) by fileserver.fields.utoronto.ca (8.12.8/8.12.8/Fields 6.0) with ESMTP id j8FLdI0r026349 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 15 Sep 2005 17:39:18 -0400 Received: from obsecurity.dyndns.org (localhost.localdomain [127.0.0.1]) by fields.fields.utoronto.ca (8.12.8/8.12.8/Fields WS 6.0) with ESMTP id j8FLdH6P027920; Thu, 15 Sep 2005 17:39:18 -0400 Received: by obsecurity.dyndns.org (Postfix, from userid 1000) id 8938A51237; Thu, 15 Sep 2005 17:39:17 -0400 (EDT) Date: Thu, 15 Sep 2005 17:39:17 -0400 From: Kris Kennaway To: Matthew Dillon Message-ID: <20050915213917.GC26998@xor.obsecurity.org> References: <20050911075157.GA93947@xor.obsecurity.org> <200509132200.j8DM0fHI005530@apollo.backplane.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="96YOpH+ONegL0A3E" Content-Disposition: inline In-Reply-To: <200509132200.j8DM0fHI005530@apollo.backplane.com> User-Agent: Mutt/1.4.2.1i Cc: current@freebsd.org, Kris Kennaway Subject: Re: 'swap_pager: indefinite wait buffer' with swapfile 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: Thu, 15 Sep 2005 21:39:24 -0000 --96YOpH+ONegL0A3E Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Sep 13, 2005 at 03:00:41PM -0700, Matthew Dillon wrote: >=20 > : > : > :--bp/iNruPH9dso1Pn > :Content-Type: text/plain; charset=3Dus-ascii > :Content-Disposition: inline > : > :I configured a vnode-backed md and enabled swapping on it. A few > :hours later after moderate swap use the console showed: > : > :swap_pager: indefinite wait buffer: bufobj: 0, blkno: 889347, size: 8192 > :[...repeated...] > : > :The backing store was a sparse file, but there was ample space: >=20 > This is likely your problem. Do NOT use a sparse file for file-backed > swap. Unfortunately making the file non-sparse did not cure the deadlock. Since it's a heavily loaded 14-processor machine it's difficult to trace every process to look for activity out of the ordinary. Kris --96YOpH+ONegL0A3E Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (FreeBSD) iD8DBQFDKeoEWry0BWjoQKURAsKrAJ0aGSJHU+KkhBwgPK2TWqZA51i9IACfbwvi sC0ddiLlJqv3pE8FVnGxANM= =D01R -----END PGP SIGNATURE----- --96YOpH+ONegL0A3E--