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Date: Thu, 18 Dec 2014 23:31:17 +0200
From: Ivan Klymenko <fidaj@ukr.net>
To: "Rang, Anton" <anton.rang@isilon.com>
Subject: Re: 11-CURRENT r275641 panic: Unrecoverable machine check exception
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=D0=92 Mon, 15 Dec 2014 17:49:54 +0000
"Rang, Anton" <anton.rang@isilon.com> =D0=BF=D0=B8=D1=88=D0=B5=D1=82:

> > I certainly could be wrong - but how to know for sure the cause of
> > the panic?
>=20
> > MCA: CPU 0 UNCOR PCC OVER DCACHE L2 DRD error
> > MCA: Address 0xbd8d4cc0
> > MCA: Misc 0x30e3000086
>=20
> The "root cause" may be hard to determine, but the immediate cause
> was helpfully decoded by the kernel. (Though I don't know whether all
> of the model-specific fields were decoded.)
>=20
> UNCOR =3D uncorrected error
> PCC =3D processor context corrupted (can't safely continue to execute,
> thus the panic) OVER =3D error overflow (hmmm, multiple errors occurred)
> DCACHE L2 DRD =3D data being read from L2 data cache
>=20
> The miscellaneous register indicates that 0xbd8d4cc0 is a physical
> address.
>=20
> So this looks like a processor failure. If it is repeatable, though,
> it may indicate either failed hardware or some problem in configuring
> the processor (though I'm not sure how that could lead to a cache
> error).
>=20
> Anton

Thank you.