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    SubjectRe: [2.4.18] preemptible patch causing freeze
    On Sun, 12 May 2002, Mikael Pettersson wrote:

    > On Sun, 12 May 2002 16:29:11 +0200 (CEST), Pawel Kot wrote:
    > >I was attempting to get new ntfs driver to work with your preemptible
    > >patch in 2.4.18 kernel. I used 2.4.18 kernel with 2.4.18-4 preempt patch
    > >and with or w/o ntfs 2.0.7b patch. The result was every time the same.
    > >I use it on the Dell laptop with APM enabled (.config in the attachment)
    > >
    > >The problem is that when I unplug the power cable, the laptop freezes. It
    > >freezes totally, but not oops or other error is generated. The problem
    > >does not exist in 2.4.18 vanilla.
    > >...
    > ># CONFIG_SMP is not set
    > >CONFIG_X86_UP_APIC=y
    > Are you sure you were using this exact .config without the
    > CONFIG_PREEMPT=y in 2.4.18 vanilla? The problem is that recent
    > Dell laptops with local APICs are known to have buggy BIOSen
    > that cause exactly the kinds of problems you described (hangs
    > at BIOS and power-management events).

    I'm sure. I did:
    $ cp $oldlinux/.config $preemptlinux/
    $ make menuconfig
    [enable preemption]
    I can recompile the kernel to make sure though.

    > 2.4.19-pre8 has the necessary workarounds for Dell Inspiron
    > and Latitude laptops. Alternatively, rebuild your kernel with
    > SMP, UP_APIC, and UP_IOAPIC all disabled.
    > (If your Dell is old enough to not have a local APIC, then this
    > is not the problem and you can ignore this message.)

    It is Dell Latitice c610. I'll try to disable APIC then.

    thanks for the answer,
    -- :: :: Kernel Traffic po polsku

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