From owner-freebsd-current@FreeBSD.ORG Wed Aug 4 10:57:23 2004 Return-Path: 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 3E46316A4CE for ; Wed, 4 Aug 2004 10:57:23 +0000 (GMT) Received: from transwarp.tao.org.uk (transwarp.tao.org.uk [212.135.162.50]) by mx1.FreeBSD.org (Postfix) with ESMTP id BD51543D69 for ; Wed, 4 Aug 2004 10:57:16 +0000 (GMT) (envelope-from joe@tao.org.uk) Received: from genius.tao.org.uk (genius.tao.org.uk [212.135.162.51]) by transwarp.tao.org.uk (Postfix) with ESMTP id 91FC9EA69; Wed, 4 Aug 2004 11:57:00 +0100 (BST) Received: by genius.tao.org.uk (Postfix, from userid 100) id 77E9B4364; Wed, 4 Aug 2004 11:57:00 +0100 (BST) Date: Wed, 4 Aug 2004 11:57:00 +0100 From: Josef Karthauser To: Dick Davies Message-ID: <20040804105700.GF5782@genius.tao.org.uk> Mail-Followup-To: Josef Karthauser , Dick Davies , FreeBSD Current list References: <20040804091722.GB5782@genius.tao.org.uk> <20040804095212.GC13269@lb.tenfour> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="Y1L3PTX8QE8cb2T+" Content-Disposition: inline In-Reply-To: <20040804095212.GC13269@lb.tenfour> User-Agent: Mutt/1.5.6i X-taoresearch-MailScanner-Information: Please contact Tao Research for more information X-taoresearch-MailScanner: Found to be clean X-MailScanner-From: joe@tao.org.uk cc: FreeBSD Current list Subject: Re: kern.maxpipekva exceeded, please see tuning(7). X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 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: Wed, 04 Aug 2004 10:57:23 -0000 --Y1L3PTX8QE8cb2T+ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Aug 04, 2004 at 10:52:12AM +0100, Dick Davies wrote: > * Josef Karthauser [0818 10:18]: > > I've got a 5.2.x machine which has hung and is giving the message > > 'kern.maxpipekva exceeded, please see tuning(7)' on the console > > whenever anyone tries to open a tcp connect to it. Does anyone > > know what this tweakable is about and what might cause it to be > > "exceeded"? The machine has been running fine for 6 months. >=20 > It's a typo, should be: >=20 > root@eris samba3 # sysctl -a|grep kva > kern.ipc.maxpipekva: 8359936 > kern.ipc.maxpipekvawired: 4177920 > kern.ipc.pipekva: 262144 > kern.ipc.pipekvawired: 0 > vfs.buffreekvacnt: 0 >=20 >=20 > - when I had this a oouple of weeks back (on 5.2 release) it was because > I'd borked my make.conf so I effectively forkbombed the box everytime I t= ried > to build a port .... O_o >=20 > any chance you changed something similar in your networking? > (maybe a loop in your NAT rules or something?) The problem appears to be caused by a failing disk returning DMA errors in swap space. What probably happened is that the tcp connections stacked up and blew the alloted space. Joe --=20 Josef Karthauser (joe@tao.org.uk) http://www.josef-k.net/ FreeBSD (cvs meister, admin and hacker) http://www.uk.FreeBSD.org/ Physics Particle Theory (student) http://www.pact.cpes.sussex.ac.uk/ =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D An eclectic mix of fact an= d theory. =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D --Y1L3PTX8QE8cb2T+ Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (FreeBSD) iEYEARECAAYFAkEQwPsACgkQXVIcjOaxUBbbkgCgq57opq7NXhcDNYOmkkzWXKvj +qsAoIKdRcg3DSv47C6dAsnl8asDNxjJ =Jg0r -----END PGP SIGNATURE----- --Y1L3PTX8QE8cb2T+--