From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 7 Nov 2001 19:42:24 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 7 Nov 2001 19:42:16 -0500 Received: from ns.virtualhost.dk ([195.184.98.160]:27915 "EHLO virtualhost.dk") by vger.kernel.org with ESMTP id ; Wed, 7 Nov 2001 19:42:00 -0500 Date: Thu, 8 Nov 2001 01:41:51 +0100 From: Jens Axboe To: bartscgr@studbox.uni-stuttgart.de Cc: linux-kernel@vger.kernel.org Subject: Re: DVD_LU_SEND_AGID slow since 2.4.10 Message-ID: <20011108014151.A27093@suse.de> In-Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Nov 08 2001, Guenter Bartsch wrote: > Hallo list, > > ever since 2.4.10 the SEND_AGID DVD_AUTH control seems to be very slow > (used in libdvdcss, freezes xine for up to 30sec). The code that's > executed seems to be: > > dvd_authinfo auth_info; > > memset( &auth_info, 0, sizeof( auth_info ) ); > auth_info.type = DVD_LU_SEND_AGID; > auth_info.lsa.agid = *pi_agid; > > i_ret = ioctl( i_fd, DVD_AUTH, &auth_info ); > > anybody here have any idea what might cause this? could this really be > just a caching problem caused by the new vm or is this something > completely different I observe here? The -ac kernel series doesn't seem to > have this problem on the same machine. > > Any comments apreciated, please cc as I'm not subscribed to the list Seems to have infested other (cdrom) ioctls as well. I'll take a look. -- Jens Axboe