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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_PREEMPT=y
> >CONFIG_X86_UP_APIC=y
> >CONFIG_X86_UP_IOAPIC=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,
pkot
--
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