From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263452AbTL2MxR (ORCPT ); Mon, 29 Dec 2003 07:53:17 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263463AbTL2MxQ (ORCPT ); Mon, 29 Dec 2003 07:53:16 -0500 Received: from mx1.redhat.com ([66.187.233.31]:16286 "EHLO mx1.redhat.com") by vger.kernel.org with ESMTP id S263452AbTL2MxF (ORCPT ); Mon, 29 Dec 2003 07:53:05 -0500 Date: Mon, 29 Dec 2003 13:52:56 +0100 From: Arjan van de Ven To: Frank van Maarseveen , linux-kernel@vger.kernel.org Subject: Re: 2.4.23 can run with HZ==0! Message-ID: <20031229125256.GA28065@devserv.devel.redhat.com> References: <20031228230522.GA1876@janus> <1072691126.5223.5.camel@laptop.fenrus.com> <20031229125240.GA4055@janus> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="n8g4imXOkfNTN/H1" Content-Disposition: inline In-Reply-To: <20031229125240.GA4055@janus> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --n8g4imXOkfNTN/H1 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Dec 29, 2003 at 01:52:40PM +0100, Frank van Maarseveen wrote: > On Mon, Dec 29, 2003 at 10:45:27AM +0100, Arjan van de Ven wrote: > >=20 > > not all motherboards can deal with HZ=3D1000.... seems yours is one of > > thise. >=20 > But it seems to work. I would expect it to fail quite soon right at or af= ter > boot, not after a day once every few weeks (assuming it was the cause). >=20 > > your patch is *highly* inadequate to get HZ=3D1000 working well in 2.4.= ... > > it needs to be about 10x bigger with fixing more userspace api's... >=20 > Can you give me an example? >=20 > HZ for x386 is 100 by definition and there aren't that many system calls > and /proc files which expose jiffies to userspace. there are quite a few you missed; scsi ioctls is one, firewall rules are another.... there's a long list (2.6 has most if not all of them fixed) --n8g4imXOkfNTN/H1 Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iD8DBQE/8COnxULwo51rQBIRAoReAJ9WtrK4Rmt+Ej9CzRF0Zn37AW75XwCgh1vU M5dtULSJ2o3CNQgU2QepvP4= =KeKe -----END PGP SIGNATURE----- --n8g4imXOkfNTN/H1--