Date: Mon, 13 Feb 2012 13:08:48 -0500 From: John Baldwin <jhb@freebsd.org> To: TAKAHASHI Yoshihiro <nyan@freebsd.org> Cc: current@freebsd.org Subject: Re: MCA UNCOR error Message-ID: <201202131308.48171.jhb@freebsd.org> In-Reply-To: <20120212.185549.343708041257811633.nyan@FreeBSD.org> References: <20120212.185549.343708041257811633.nyan@FreeBSD.org>
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On Sunday, February 12, 2012 4:55:49 am TAKAHASHI Yoshihiro wrote: > I get the following error and kernel panic on my pc98 at the boot time. > > MCA: Bank 2, Status 0xb600000000140000 > MCA: Global Cap 0x0000000000000005, Status 0x0000000000000004 > MCA: Vendor "GenuineIntel", ID 0x616, APIC ID 0 > MCA: CPU 0 UNCOR PCC no error > MCA: Address 0x3446ff003446ff > > When I disable MCA with hw.mca.enabled=0 on loader prompt, the machine > works fine. Does it mean my pc98 is broken? Or other isssue? > > It's spec is: > > FreeBSD 10.0-CURRENT #5: Thu Feb 9 13:18:22 UTC 2012 > CPU: Pentium Pro (198.95-MHz 686-class CPU) > Origin = "GenuineIntel" Id = 0x616 Family = 6 Model = 1 Stepping = 6 > Features=0xf9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV> > real memory = 134217728 (128 MB) > avail memory = 120471552 (114 MB) Interesting, that is odd to get an error with no error code. Can you tell from the stack trace if your CPU actually raised a machine check exception (trap 28)? -- John Baldwin
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