[PATCH 0/3] x86: unify crash_32/64.c

Hiroshi Shimamoto h-shimamoto at ct.jp.nec.com
Fri Oct 26 20:13:45 EDT 2007

Thomas Gleixner wrote:
> On Fri, 26 Oct 2007, Hiroshi Shimamoto wrote:
> Added Venki to CC
>>> I'm now testing crash on 32bit, but there is an issue before
>>> applying the patches. My machine stopped at checking 'hlt'
>>> after kexec, showing below message.
>>> CPU: Intel(R) Xeon(TM) CPU 3.80GHz stepping 0a
>>> Checking 'hlt' instruction...
>> v2.6.23.1 works fine for 1st kernel.
>>> I'm investigating it..
>> I found that the following patch makes my machine stopped.
>> bfe0c1cc6456bba1f4e3cc1fe29c0ea578ac763a
>> x86: HPET force enable for ICH5
>> It means that after applied this patch, HPET is enabled
>> automatically on 1st kernel and after crash/kexec the 2nd
>> kernel stopped at checking 'hlt'.
>> I also tested the latest kernel(2.6.24-rc1-gec3b67c1).
>> Boot parameter "nohpet" resolves this issue and kdump
>> works well on 32bit.
>> So I guess HPET affects this.
>> But I don't know why 64bit kernel with HPET is OK.
> Hmm. Does the 64 bit code shutdown HPET and restore the IRQ routing to
> PIT and 32 bit is missing this ?

Sorry, I'm not sure how I can get these informations.
Can you please tell me what I should do?
I'll continue to dig the issue.

I also have the following message.
..MP-BIOS bug: 8254 timer not connected to IO-APIC
Kernel panic - not syncing: IO-APIC + timer doesn't work! Try using the 'noapic' kernel parameter

It appeared only on 64bit and the 2nd kernel without
boot parameter noapic.

Hiroshi Shimamoto

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