From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Gregor Jasny" Subject: libata: 30sec delay during boot with cdrom attached Date: Thu, 1 Mar 2007 17:39:08 +0100 Message-ID: <9d2cd630703010839x1cd9a8b1rd2e6575eb5a9d615@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from an-out-0708.google.com ([209.85.132.240]:12558 "EHLO an-out-0708.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965352AbXCAQjJ (ORCPT ); Thu, 1 Mar 2007 11:39:09 -0500 Received: by an-out-0708.google.com with SMTP id b33so436268ana for ; Thu, 01 Mar 2007 08:39:08 -0800 (PST) Content-Disposition: inline Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org Hi, after switching to libata on my old Dell notebook, I get a 30 seconds long delay during boot. If I remove the CDROM the boot process is as fast as with the old ide driver. Boot with cdrom: [ 28.103034] ata_piix 0000:00:07.1: version 2.00ac7 [ 28.103234] ata1: PATA max UDMA/33 cmd 0x1F0 ctl 0x3F6 bmdma 0x860 irq 14 [ 28.103841] ata2: PATA max UDMA/33 cmd 0x170 ctl 0x376 bmdma 0x868 irq 15 [ 28.104535] scsi0 : ata_piix [ 28.263015] ata1.00: ATA-7, max UDMA/100, 78242976 sectors: LBA48 [ 28.263486] ata1.00: ata1: dev 0 multi count 8 [ 28.269671] ata1.00: configured for UDMA/33 [ 28.270001] scsi1 : ata_piix ^-- Hangs here [ 58.594321] ata2.00: ATAPI, max UDMA/33 [ 58.754241] ata2.00: configured for UDMA/33 [ 58.754852] scsi 0:0:0:0: Direct-Access ATA SAMSUNG MP0402H UC10 PQ: 0 ANSI: 5 [ 58.755787] SCSI device sda: 78242976 512-byte hdwr sectors (40060 MB) [ 58.756312] sda: Write Protect is off [ 58.756595] sda: Mode Sense: 00 3a 00 00 [ 58.756657] SCSI device sda: write cache: enabled, read cache: enabled, doesn't support DPO or FUA [ 58.757459] SCSI device sda: 78242976 512-byte hdwr sectors (40060 MB) [ 58.757976] sda: Write Protect is off [ 58.758258] sda: Mode Sense: 00 3a 00 00 [ 58.758318] SCSI device sda: write cache: enabled, read cache: enabled, doesn't support DPO or FUA [ 58.758984] sda: sda1 sda2 sda3 sda4 [ 59.212482] sd 0:0:0:0: Attached scsi disk sda [ 59.213005] sd 0:0:0:0: Attached scsi generic sg0 type 0 [ 59.213930] scsi 1:0:0:0: CD-ROM SAMSUNG CD-ROM SN-124 N102 PQ: 0 ANSI: 5 [ 59.236734] sr0: scsi3-mmc drive: 24x/24x cd/rw xa/form2 cdda tray [ 59.252814] Uniform CD-ROM driver Revision: 3.20 [ 59.269038] sr 1:0:0:0: Attached scsi CD-ROM sr0 [ 59.269228] sr 1:0:0:0: Attached scsi generic sg1 type 5 My notebook has a PIIX4 controller: IDE interface: Intel Corporation 82371AB/EB/MB PIIX4 IDE (rev 01) This happens with all libata enabled kernels including the latest git snapshot (2.6.21-rc2). Can anyone shed some light on this? Thanks, Gregor PS: As far as I remember this cdrom was blacklisted for DMA or whatever reasons in early Linux 2.6 kernels.