On 01 May 2016, at 14:35, Shawn Webb <shawn.w...@hardenedbsd.org> wrote: > > I'm getting this panic. I'm not sure if it's a problem with the OS or > the hardware as this is a bit too low-level for me. Here's the dmesg > output along with the stack trace: > > MCA: Bank 0, Status 0xb400000000000135 > MCA: Global Cap 0x0000000000000106, Status 0x0000000000000004 > MCA: Vendor "AuthenticAMD", ID 0x730f01, APIC ID 3 > MCA: CPU 3 UNCOR DCACHE L1 DRD error > MCA: Address 0x44e9830 > panic: Unrecoverable machine check exception > cpuid = 3 > KDB: stack backtrace: > db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe00f53cb390 > vpanic() at vpanic+0x182/frame 0xfffffe00f53cb410 > panic() at panic+0x43/frame 0xfffffe00f53cb470 > mca_intr() at mca_intr+0x6b/frame 0xfffffe00f53cb490 > trap() at trap+0xa8/frame 0xfffffe00f53cb6a0 > calltrap() at calltrap+0x8/frame 0xfffffe00f53cb6a0 > --- trap 0x1c, rip = 0xffffffff80b6ffe1, rsp = 0xfffffe00f53cb770, rbp = > 0xfffffe00f53cb7f0 --- > callout_process() at callout_process+0x131/frame 0xfffffe00f53cb7f0 > handleevents() at handleevents+0x16d/frame 0xfffffe00f53cb830 > timercb() at timercb+0x227/frame 0xfffffe00f53cb880 > lapic_handle_timer() at lapic_handle_timer+0x9f/frame 0xfffffe00f53cb8c0 > Xtimerint() at Xtimerint+0x8c/frame 0xfffffe00f53cb8c0 > --- interrupt, rip = 0xffffffff80b85a39, rsp = 0xfffffe00f53cb990, rbp = > 0xfffffe00f53cba70 --- > sched_idletd() at sched_idletd+0x439/frame 0xfffffe00f53cba70 > fork_exit() at fork_exit+0x84/frame 0xfffffe00f53cbab0 > fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00f53cbab0 > --- trap 0, rip = 0, rsp = 0, rbp = 0 --- > KDB: enter: panic > [ thread pid 11 tid 100006 ] > Stopped at kdb_enter+0x3b: movq $0,kdb_why > db> > > This is running HardenedBSD 11-CURRENT/amd64 on the PC-Engines APU2. Is > this worth filing a bug report upstream with FreeBSD or is this a > hardware bug?
Hi Shawn, This particular part seems to indicate a hardware problem: MCA: Vendor "AuthenticAMD", ID 0x730f01, APIC ID 3 MCA: CPU 3 UNCOR DCACHE L1 DRD error MCA: Address 0x44e9830 panic: Unrecoverable machine check exception I'm not a MCE expert, but it looks like core 3 got an uncorrectable L1 data cache error. -Dimitry
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