Date: Sat, 13 Dec 2014 11:38:23 +0200 From: Ivan Klymenko <fidaj@ukr.net> To: Andriy Gapon <avg@FreeBSD.org> Cc: freebsd-current@FreeBSD.org Subject: Re: 11-CURRENT r275641 panic: Unrecoverable machine check exception Message-ID: <20141213113823.660a1e05@nonamehost.local> In-Reply-To: <548B85E7.7000102@FreeBSD.org> References: <20141212214653.41cec479@nonamehost.local> <548B85E7.7000102@FreeBSD.org>
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=D0=92 Sat, 13 Dec 2014 02:18:47 +0200 Andriy Gapon <avg@FreeBSD.org> =D0=BF=D0=B8=D1=88=D0=B5=D1=82: > On 12/12/2014 21:46, Ivan Klymenko wrote: > > Hi. > >=20 > >=20 > > I see such a panic the first time in 10 years. >=20 > good and how >=20 > > Fri Dec 12 21:35:11 EET 2014 > >=20 > > FreeBSD nonamehost.local 11.0-CURRENT FreeBSD 11.0-CURRENT #0 > > r275641: Tue Dec 9 17:03:43 EET 2014 > > ivan@nonamehost.local:/media/da0s1/obj/usr/src/sys/mk11 amd64 > >=20 > > panic: Unrecoverable machine check exception >=20 > Google for "machine check exception" if you haven't yet. >=20 I very much doubt that it is a hardware problem - in the other case, I would not write about it here -CPU is not overclocked -Memory (RAM) is in order -no overheating -panic accurately reproduced - not occur randomly -Panic occurs without high load CPU -mcelog --no-dmi --ascii - nothing I suspect that the added non-existent instructions for my CPU CPU: Intel(R) Core(TM) i5-2410M CPU @ 2.30GHz (2294.84-MHz K8-class CPU) Origin=3D"GenuineIntel" Id=3D0x206a7 Family=3D0x6 Model=3D0x2a Stepping= =3D7 Dec 13 10:11:45 nonamehost kernel: Features=3D0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,= MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT, TM,PBE> Features2=3D0x1fbae3bf<SSE3,PCLMULQDQ,DTES64,MON,DS_CPL,VMX,EST,TM2,SSSE3,C= X16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,TSCDLT,AESNI,X SAVE,OSXSAVE,AVX> AMD Features=3D0x28100800<SYSCALL,NX,RDTSCP,LM> AMD Features2=3D0x1<LAHF> Dec 13 10:11:45 nonamehost kernel: XSAVE Features=3D0x1<XSAVEOPT> and it manifests itself in the assembly source code with the flag CPUTYPE?=3Dcorei7-avx I certainly could be wrong - but how to know for sure the cause of the panic? Best regards.
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