Re: ide-cdrom / atapi burning bug - 2.6.1

From: Mans Matulewicz (cybermans_at_xs4all.nl)
Date: 01/31/04

  • Next message: Sergey S. Kostyliov: "2.6.1 IO lockup on SMP systems" 
    To: linux-kernel@vger.kernel.org
Date:	Sat, 31 Jan 2004 17:45:27 +0100

    On Sat, 2004-01-31 at 11:32, Jens Axboe wrote:
    > On Sat, Jan 31 2004, Mans Matulewicz wrote:
    > > On Sat, 2004-01-31 at 11:20, Jens Axboe wrote:
    > > > On Sat, Jan 31 2004, Mans Matulewicz wrote:
    > > > > On Sat, 2004-01-31 at 10:34, Jens Axboe wrote:
    > > > > > On Sat, Jan 31 2004, Mans Matulewicz wrote:
    > > > > > > Hi,
    > > > > > > After replacing my 2.4.22 with a 2.6.1 kernel I tried ATAPI cd burning.
    > > > > > > This totally fails. Most of the CD's are corrupt and my system totally
    > > > > > > locks up when erasing an cdrw (reset button was the option I needed to
    > > > > > > reboot my system) . k3b reports cd is completely burned but fails are
    > > > > > > not identical or totally unreadable. I tried it both with an tainted
    > > > > > > (nvidia) and an untainted (nv) kernel: same results. With ide-scsi
    > > > > > > burning in 2.4.x I had no problems.
    > > > > >
    > > > > > Did you use DMA in 2.4 as well? Does 2.6 work if you turn it off? It's
    > > > > > most likely an issue with your via adapter.
    > > > >
    > > > > I used DMA in 2.4.
    > > > >
    > > > > I tried without dma on but it still totally locks my system while
    > > > > erasing an rw.
    > > >
    > > > Do you really have an SMP box, or are you just using an SMP kernel? If
    > > > you have SMP, it would be interesting to enable the nmi watchdog (if it
    > > > works on your system).
    > > >
    > > > Are you using preempt?
    > >
    > > Its just an smp kernel. I only have one cpu.
    > >
    > > Preempt is enabled in kernel
    >
    > Could you try disabling preempt?

    That worked.
    preempt= off
    dma was on

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