From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763470AbXHPVPo (ORCPT ); Thu, 16 Aug 2007 17:15:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758513AbXHPVPY (ORCPT ); Thu, 16 Aug 2007 17:15:24 -0400 Received: from turing-police.cc.vt.edu ([128.173.14.107]:43803 "EHLO turing-police.cc.vt.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759771AbXHPVPN (ORCPT ); Thu, 16 Aug 2007 17:15:13 -0400 X-Mailer: exmh version 2.7.2 01/07/2005 with nmh-1.2 To: devzero@web.de Cc: linux-kernel@vger.kernel.org, bunk@stusta.de, pwil3058@bigpond.net.au Subject: Re: [ANNOUNCE][RFC] PlugSched-6.5.1 for 2.6.22 In-Reply-To: Your message of "Thu, 16 Aug 2007 22:42:42 +0200." <1930295607@web.de> From: Valdis.Kletnieks@vt.edu References: <1930295607@web.de> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_1187298845_6540P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Date: Thu, 16 Aug 2007 17:14:05 -0400 Message-ID: <19230.1187298845@turing-police.cc.vt.edu> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --==_Exmh_1187298845_6540P Content-Type: text/plain; charset=us-ascii On Thu, 16 Aug 2007 22:42:42 +0200, devzero@web.de said: > i trust you kernel developers know what you are doing, but if scares me > a little bit, that some integral and living part like O(1) being ripped off > and being replaced by something new. There's something even scarier - O(1) being taken out and replaced by multiple new things, none of which ever gets fully tested because if one misbehaves, the user says "so what" and tries another one without bothering to file a bug report... Been there, done that - I found a timing hole in the pluggable I/O schedulers that probably nobody had managed to hit because there were 3 or 4 choices available, and they just set a default they liked. Turned out there was a race condition if I/O happened while schedulers were being swapped. --==_Exmh_1187298845_6540P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (GNU/Linux) Comment: Exmh version 2.5 07/13/2001 iD8DBQFGxL4dcC3lWbTT17ARAoISAKDwGmm12zyIWCZk1cvnCdNwcDI/XwCdE2yn dTfqXHDkWdFIkFsX1yfb9gY= =07kx -----END PGP SIGNATURE----- --==_Exmh_1187298845_6540P--