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SubjectRe: [boot crash] Re: [tip:x86/mce3] x86, mce: use 64bit machine check code on 32bit

* Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> wrote:

> Hi Ingo,
>
> Ingo Molnar wrote:
> > * tip-bot for Andi Kleen <ak@linux.intel.com> wrote:
> >
> >> Commit-ID: 4efc0670baf4b14bc95502e54a83ccf639146125
> >> Gitweb: http://git.kernel.org/tip/4efc0670baf4b14bc95502e54a83ccf639146125
> >> Author: Andi Kleen <ak@linux.intel.com>
> >> AuthorDate: Tue, 28 Apr 2009 19:07:31 +0200
> >> Committer: H. Peter Anvin <hpa@zytor.com>
> >> CommitDate: Thu, 28 May 2009 09:24:13 -0700
> >>
> >> x86, mce: use 64bit machine check code on 32bit
>
> (snip)
>
> >
> > This commit causes a new regression, it broke the bootup on one of
> > my -tip testsystems, an older, Pentium-M based HP laptop (HP
> > OmniBook 6000 EA).
> >
> > The symptom is that the bootup hard-hangs after MCE init:
> >
> > [ 0.022996] Mount-cache hash table entries: 512
> > [ 0.024996] Initializing cgroup subsys debug
> > [ 0.025996] Initializing cgroup subsys cpuacct
> > [ 0.026995] Initializing cgroup subsys devices
> > [ 0.027995] Initializing cgroup subsys freezer
> > [ 0.028995] mce: CPU supports 5 MCE banks
> >
> > Kernel config attached. cpuinfo:
> >
> > processor : 0
> > vendor_id : GenuineIntel
> > cpu family : 6
> > model : 8
> > model name : 06/08
> > stepping : 10
> > cpu MHz : 846.372
>
> According to the cpuid, I suppose this cpu is Pentium III.

yep.

> > fdiv_bug : no
> > hlt_bug : no
> > f00f_bug : no
> > coma_bug : no
> > fpu : yes
> > fpu_exception : yes
> > cpuid level : 2
> > wp : yes
> > flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36 mmx fxsr sse up
>
> None of acpi, apic, and tm is available.
> So at least thermal codes should be innocent.

yes.

> > bogomips : 1692.74
> > clflush size : 32
> > power management:
> >
> > Ingo
>
> Could you try boot your laptop with mce=nobootlog?

Hm, why should that make any difference? mce=nobootlog only
influences whether we pass records into the mcelog buffer but does
not affect whether we touch the hardware.

Ingo


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