From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965123Ab2CQKx5 (ORCPT ); Sat, 17 Mar 2012 06:53:57 -0400 Received: from smtp3-g21.free.fr ([212.27.42.3]:49583 "EHLO smtp3-g21.free.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756743Ab2CQKxz convert rfc822-to-8bit (ORCPT ); Sat, 17 Mar 2012 06:53:55 -0400 Date: Sat, 17 Mar 2012 11:53:24 +0100 From: Emmanuel Florac To: Stefan Richter Cc: Wakko Warner , linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org Subject: Re: Burning multiple DVDs at one time Message-ID: <20120317115324.10b39bb7@galadriel.home> In-Reply-To: <20120317095644.145d0588@stein> References: <20120315225310.GB3152@animx.eu.org> <20120317095644.145d0588@stein> Organization: Intellique X-Mailer: Claws Mail 3.7.8 (GTK+ 2.20.1; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Le Sat, 17 Mar 2012 09:56:44 +0100 vous écriviez: > This is likely due to serialization by a global mutex in the sr > driver. Have a look at thread "[PATCH] [SCSI] sr: fix multi-drive > performance, remove BKL replacement" from February. > https://lkml.org/lkml/2012/2/28/230 When was this regression introduced? I have a dedicated cd burning machine running 2.6.35.x, and it works great with 4 drives at a time. -- ------------------------------------------------------------------------ Emmanuel Florac | Direction technique | Intellique | | +33 1 78 94 84 02 ------------------------------------------------------------------------