From owner-freebsd-stable@FreeBSD.ORG Sun Nov 27 22:46:07 2005 Return-Path: X-Original-To: stable@freebsd.org Delivered-To: freebsd-stable@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 0E43016A41F; Sun, 27 Nov 2005 22:46:07 +0000 (GMT) (envelope-from imbutler@comcast.net) Received: from rwcrmhc11.comcast.net (rwcrmhc11.comcast.net [204.127.198.35]) by mx1.FreeBSD.org (Postfix) with ESMTP id C902343D49; Sun, 27 Nov 2005 22:46:04 +0000 (GMT) (envelope-from imbutler@comcast.net) Received: from mail.auburn.protected-networks.net ([24.218.147.31]) by comcast.net (rwcrmhc11) with ESMTP id <200511272246030130091m07e>; Sun, 27 Nov 2005 22:46:03 +0000 Received: from localhost (localhost.auburn.protected-networks.net [127.0.0.1]) by mail.auburn.protected-networks.net (Postfix) with ESMTP id 7624217042; Sun, 27 Nov 2005 17:45:52 -0500 (EST) Received: from mail.auburn.protected-networks.net (localhost.auburn.protected-networks.net [127.0.0.1]) by mail.auburn.protected-networks.net (Postfix) with ESMTP id C9EFB17043; Sun, 27 Nov 2005 17:45:40 -0500 (EST) Authentication-Results: mail.auburn.protected-networks.net from=imbutler@comcast.net; domainkey=neutral (no signature; no policy for comcast.net) Received: from [192.168.1.10] (c-24-218-147-31.hsd1.ma.comcast.net [24.218.147.31]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "imb@protected-networks.net", Issuer "Protected Networks Certificate Authority" (verified OK)) (Authenticated sender: imb@mail.auburn.protected-networks.net) by mail.auburn.protected-networks.net (Postfix) with ESMTP id 6319A17042; Sun, 27 Nov 2005 17:45:40 -0500 (EST) Message-ID: <438A3712.1040804@comcast.net> Date: Sun, 27 Nov 2005 17:45:38 -0500 From: Michael Butler User-Agent: Mozilla Thunderbird 1.0.7 (Windows/20050923) X-Accept-Language: en-us, en MIME-Version: 1.0 To: =?ISO-8859-1?Q?S=F8ren_Schmidt?= References: <438A116C.3010803@protected-networks.net> <438A1BA1.1010407@deepcore.dk> In-Reply-To: <438A1BA1.1010407@deepcore.dk> X-Enigmail-Version: 0.93.0.0 OpenPGP: id=5E873CC5 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit Cc: stable@FreeBSD.ORG Subject: Re: ata (raid) patches X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 27 Nov 2005 22:46:07 -0000 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Søren Schmidt wrote: |> 3) another part of this patch is to ata-raid where the choice of drive |> from which to read favours one side of a mirror even when both drives |> are near the block(s) we want. Because the mirror is on another channel |> on the Highpoint controller, it performs (marginally :-() better when we |> toggle between them. | | | Hmm, well, depends on what sort of behavior one wants to optimise for. I | have a few other patches for optimisations but havn't decided what to | eventually use yet. Guess its time for me to run some tests on this.. On further investigation, I'd failed to notice (doh!) that rdp->toggle isn't preserved between requests and that one unobvious side-effect of the original code is that it does slightly better than my patched version .. . I'll rework this and see if I can make it do better, Michael -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (MingW32) iD8DBQFDijcSiJykeV6HPMURAiRkAJ4omvpWlXhsJn+B17jZiyCwCl58DgCdFXJJ EndsDJBOOn/m3Dl5fQkMziA= =6dn0 -----END PGP SIGNATURE-----