Re: [PATCH] x86_64: Test patch for ATI/Nvidia timer problems

From: René Rebe (rene_at_exactcode.de)
Date: 11/27/05

  • Next message: Shawn Starr: "Re: Bogus MCE upon resumption of system? - Resolved" 
    To: Andi Kleen <ak@suse.de>
Date:	Sun, 27 Nov 2005 10:14:53 +0100

    Hi,

    On Saturday 26 November 2005 15:20, Andi Kleen wrote:
    > Everybody who saw timing problems with ATI IXP based boards with x86-64
    > or some Nvidia NForce4 boards please test this patch. Please send
    > success/failure to me.

    I try to give your patch a try on the ATI based MSI Megabook S270, today -
    however even with the workaround of "noapic" I had timer drift on resuem from
    ram if the cpu was scaled to a lower frequency when it was suspended.

    The k8 cpufreq code failed to assert the current frequency and thus assumed a
    wrong one:

    Restarting tasks...<3>powernow-k8: ignoring illegal change in lo freq table-0
    to 0x0
    powernow-k8: transition frequency failed
     done

    Also my ACPI table only has two frequency entries, 800000 and 1600000 MHz - I
    wonder if one could rework the powernow-k8 driver to interpolate values in
    between to get smoother adaption of the frequency?

    Yours, 

    -- 
René Rebe - Rubensstr. 64 - 12157 Berlin (Europe / Germany)
            http://www.exactcode.de | http://www.t2-project.org
            +49 (0)30  255 897 45
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  • Next message: Shawn Starr: "Re: Bogus MCE upon resumption of system? - Resolved"