Extremely slow IO with a PCMCIA CompactFlash adapter

On Sunday 02 August 2009 17:30:56 Jack Byer wrote:
> > Get 2.6.31-rc5 kernel.
> >
> > Set:
> >
> >        CONFIG_IDE=m
> >        CONFIG_BLK_DEV_IDECS=m
> >
> > in the kernel config.
> >
> > Build, install, reboot.
> >
> > Load ide-cs module.
> >
> > Enjoy the speed increase using /dev/hda.
> >
> > You may try "hdparm -c1 /dev/hda" for an extra enjoyment.
> 
> I still get the IRQ error, but reads are 73 kB/s without irqpoll, 580
> kB/s with irqpoll.  When I try to use hdparm the mount command hangs
> forever.
> 
> Is there any harm with using irqpoll all the time?

Depends on the system and usage, in this particular case it should
probably be fine but it would be better to fix the underlying problem
or apply the workaround automatically..

(hdparm fails since it turns out that 32-bit I/O cannot be used)

> ACPI: PCI Interrupt Link [LNKG] enabled at IRQ 3
> PCI: setting IRQ 3 as level-triggered
> serial 0000:00:08.0: PCI INT A -> Link[LNKG] -> GSI 3 (level, low) ->
> IRQ 3
> serial 0000:00:08.0: PCI INT A disabled

There is an unsupported softmodem on the same IRQ that cardbus/pcmcia
controller and it is probably the source of unexpected IRQs..

> pata_ali 0000:00:10.0: can't derive routing for PCI INT A
> scsi0 : pata_ali
> scsi1 : pata_ali
> ata1: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0x8080 irq 14
> ata2: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0x8088 irq 15
> yenta_cardbus 0000:00:0a.0: CardBus bridge found [103c:0024]
> yenta_cardbus 0000:00:0a.0: O2: res at 0x94/0xD4: 00/ea
> yenta_cardbus 0000:00:0a.0: O2: enabling read prefetch/write burst
> ACPI: Lid Switch [LID]
> ata1.00: ATA-6: ST9100823A, 3.00, max UDMA/100
> ata1.00: 195371568 sectors, multi 16: LBA
> ata1.00: configured for UDMA/100
> scsi 0:0:0:0: Direct-Access     ATA      ST9100823A       3.00 PQ: 0
> ANSI: 5
> ata2.00: ATAPI: DW-224E, A.0H, max MWDMA2
> ata2.00: WARNING: ATAPI DMA disabled for reliablity issues.  It can be
> enabled
> ata2.00: WARNING: via pata_ali.atapi_dma modparam or corresponding
> sysfs node.
> ata2.00: configured for MWDMA2

BTW configured for MWDMA2 but DMA won't be used..

per comment from pata_ali.c:

static int ali_check_atapi_dma(struct ata_queued_cmd *qc)
{
        if (!ali_atapi_dma) {
                /* FIXME: pata_ali can't do ATAPI DMA reliably but the
                 * IDE alim15x3 driver can.  I tried lots of things
                 * but couldn't find what the actual difference was.
                 * If you got an idea, please write it to
                 * linux-ide@vger.kernel.org and cc htejun@gmail.com.
                 *
                 * Disable ATAPI DMA for now.
                 */
                return -EOPNOTSUPP;
        }

If you want to use DMA you need to use alim15x3..

> Uniform Multi-Platform E-IDE driver
> Probing IDE interface ide0...
> hda: IBM-DMDM-10340, CFA DISK drive
> hdb: IBM-DMDM-10340, CFA DISK drive
> ide-probe: ignoring undecoded slave
> irq 3: nobody cared (try booting with the "irqpoll" option)
> Pid: 1144, comm: modprobe Not tainted 2.6.31-rc5 #3
> Call Trace:
>  [<c104e424>] ? __report_bad_irq+0x24/0x90
>  [<c104e5e7>] ? note_interrupt+0x157/0x1a0
>  [<c104edfb>] ? handle_level_irq+0xbb/0x100
>  [<c1004ec7>] ? handle_irq+0x17/0x20
>  [<c100490a>] ? do_IRQ+0x3a/0xb0
>  [<c1003329>] ? common_interrupt+0x29/0x30
>  [<c10284e5>] ? __do_softirq+0x35/0xf0
>  [<c104d51d>] ? handle_IRQ_event+0x2d/0xc0
>  [<c10285cd>] ? do_softirq+0x2d/0x40
>  [<c102877d>] ? irq_exit+0x5d/0x80
>  [<c1004913>] ? do_IRQ+0x43/0xb0
>  [<c1003329>] ? common_interrupt+0x29/0x30
>  [<c104dc3a>] ? __setup_irq+0x17a/0x2c0
>  [<f8450df0>] ? ide_intr+0x0/0x250 [ide_core]
>  [<c104de41>] ? request_threaded_irq+0xc1/0x100
>  [<f84547da>] ? ide_host_register+0x3ea/0x650 [ide_core]
>  [<f8454a6f>] ? ide_host_add+0x2f/0x70 [ide_core]
>  [<f846a157>] ? idecs_register+0xb7/0x160 [ide_cs]
>  [<f846a3a9>] ? ide_probe+0x1a9/0x2d0 [ide_cs]
>  [<f834ba26>] ? pcmcia_device_probe+0xf6/0x1b0 [pcmcia]
>  [<c10ca0f1>] ? sysfs_do_create_link+0xa1/0x140
>  [<c1155cd4>] ? driver_probe_device+0x74/0x180
>  [<c1155e61>] ? __driver_attach+0x81/0x904a0 [pcmcia]
>  [<f834b7b0>] ? pcmcia_device_remove+0x0/0x140 [pcmcia]
>  [<c1155624>] ? bus_for_each_dev+0x54/0x80
>  [<f834b7b0>] ? pcmcia_device_remove+0x0/0x140 [pcmcia]
>  [<c1155b76>] ? driver_attach+0x16/0x20
>  [<c1155de0>] ? __driver_attach+0x0/0x90
>  [<c1154eb6>] ? bus_add_driver+0xb6/0x250
>  [<f834b7b0>] ? pcmcia_device_remove+0x0/0x140 [pcmcia]
>  [<c11560d7>] ? driver_register+0x67/0x150
>  [<f834cb51>] ? pcmcia_register_driver+0x91/0x110 [pcmcia]
>  [<f846f000>] ? init_ide_cs+0x0/0xa [ide_cs]
>  [<c100102a>] ? _stext+0x2a/0x160
>  [<c104b3f3>] ? sys_init_module+0xb3/0x1f0
>  [<c1081cf1>] ? sys_read+0x41/0x80
>  [<c1002cf4>] ? sysenter_do_call+0x12/0x26
> handlers:
> [<f8450df0>] (ide_intr+0x0/0x250 [ide_core])
> Disabling IRQ #3
> ali_stimer_read: stimer is not ready.

Seems like there is also a bug in ali5451 sound driver..

This should help:

---
 sound/pci/ali5451/ali5451.c |   11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

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Message ID	200908022027.18937.bzolnier@gmail.com
State	Not Applicable
Delegated to:	David Miller
Headers	show Return-Path: <linux-ide-owner@vger.kernel.org> X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by bilbo.ozlabs.org (Postfix) with ESMTP id 5EF26B7B5C for <incoming@patchwork.ozlabs.org>; Mon, 3 Aug 2009 04:28:23 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751249AbZHBS2U (ORCPT <rfc822;incoming@patchwork.ozlabs.org>); Sun, 2 Aug 2009 14:28:20 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751872AbZHBS2U (ORCPT <rfc822; linux-ide-outgoing>); Sun, 2 Aug 2009 14:28:20 -0400 Received: from mail-bw0-f219.google.com ([209.85.218.219]:51184 "EHLO mail-bw0-f219.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751249AbZHBS2S (ORCPT <rfc822;linux-ide@vger.kernel.org>); Sun, 2 Aug 2009 14:28:18 -0400 Received: by bwz19 with SMTP id 19so2096941bwz.37 for <multiple recipients>; Sun, 02 Aug 2009 11:28:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:from:to:subject:date :user-agent:cc:references:in-reply-to:mime-version :content-disposition:message-id:content-type :content-transfer-encoding; bh=Qdmi/so7Dxpx/Ziw3aYudHbVK0bkINaa1l+jbN4SA50=; b=rmdJlilYs/MQnZcNie9atzozMBJ8aB7PKokD+gqUN3iQURC925onGzLJ3Jp+Zb0SPz 7ylPMeqIFM4Ra+vO0snW6C1xFfaJBKFXFFl0EJtWBDxQsVVvjsE4bj6yASA4w8rwXQPY fE7DrQy/0yJCQ4NE9dvvNAZV1Slm8qQExE/FQ= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:subject:date:user-agent:cc:references:in-reply-to :mime-version:content-disposition:message-id:content-type :content-transfer-encoding; b=cQfwIluB5LKIo9ydKvF9mZ1EKoPtsSA8iADWoiBp/nqaAAR1s7KDNcD2VaXpyG8XwB iHsyjEhQkbAFQvIvkS8gnWR390hh5VP4u06AwZg7Y8eOVY/B3ftghjrk7+LiIq1JXobE ex23sMbu/PtbiZQlLFNrYtAkD0GgedSkiNle0= Received: by 10.103.189.18 with SMTP id r18mr60099mup.119.1249237696190; Sun, 02 Aug 2009 11:28:16 -0700 (PDT) Received: from localhost.localdomain (chello089077034197.chello.pl [89.77.34.197]) by mx.google.com with ESMTPS id n10sm32616772mue.49.2009.08.02.11.28.15 (version=TLSv1/SSLv3 cipher=RC4-MD5); Sun, 02 Aug 2009 11:28:15 -0700 (PDT) From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> To: Jack Byer <ojbyer@usa.net> Subject: Re: Extremely slow IO with a PCMCIA CompactFlash adapter Date: Sun, 2 Aug 2009 20:27:18 +0200 User-Agent: KMail/1.11.4 (Linux/2.6.31-rc4-next-20090731-05372-g784fb81; KDE/4.2.4; i686; ; ) Cc: linux-kernel@vger.kernel.org, Robert Hancock <hancockrwd@gmail.com>, Alan Cox <alan@lxorguk.ukuu.org.uk>, Andreas Mohr <andi@lisas.de>, linux-ide@vger.kernel.org References: <h51hro$p6j$1@ger.gmane.org> <200908021538.45180.bzolnier@gmail.com> <cdb43e8a0908020830r3ef054cbs30ee6669115e8335@mail.gmail.com> In-Reply-To: <cdb43e8a0908020830r3ef054cbs30ee6669115e8335@mail.gmail.com> MIME-Version: 1.0 Content-Disposition: inline Message-Id: <200908022027.18937.bzolnier@gmail.com> Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Sender: linux-ide-owner@vger.kernel.org Precedence: bulk List-ID: <linux-ide.vger.kernel.org> X-Mailing-List: linux-ide@vger.kernel.org

Extremely slow IO with a PCMCIA CompactFlash adapter

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