From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@bugzilla.kernel.org Subject: [Bug 15884] cd-burning reduces other simultaneous IO performance Date: Sat, 1 May 2010 01:29:42 GMT Message-ID: <201005010129.o411Tgn7022000@demeter.kernel.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Return-path: Received: from demeter.kernel.org ([140.211.167.39]:34593 "EHLO demeter.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753329Ab0EAB3n (ORCPT ); Fri, 30 Apr 2010 21:29:43 -0400 Received: from demeter.kernel.org (localhost.localdomain [127.0.0.1]) by demeter.kernel.org (8.14.3/8.14.3) with ESMTP id o411Tgqb022002 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Sat, 1 May 2010 01:29:42 GMT In-Reply-To: Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: linux-ide@vger.kernel.org https://bugzilla.kernel.org/show_bug.cgi?id=15884 Robert Hancock changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |hancockrwd@gmail.com --- Comment #2 from Robert Hancock 2010-05-01 01:29:37 --- You can't have a command outstanding on both the master and slave drive on a PATA channel at the same time. If the software issues a command like "erase disc" to the drive, during the time that command is outstanding no commands can be issued to the other drive on that channel, it's the way PATA works. Now, there may be a difference in what commands the burning software is using or the ordering that results in some of them taking longer than it does in Windows or something. (I don't know the MMC commands that well but I think some of them do have a mode where you can issue the command and poll periodically to see if it's done rather than blocking on the operation until it finishes.) That isn't anything the kernel can do anything about, though - if something issues a command to one drive on the channel that takes a long time, anything wanting to access the other drive just has to wait. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug.