boot hang at r339386

From: Mike Tancsa <mike_at_sentex.net>
Date: Thu, 18 Oct 2018 11:12:11 -0400
On r339386 I am seeing a 100% hang at boot up time.  Boot ends at

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FreeBSD 12.0-ALPHA10 r339415 GENERIC amd64
FreeBSD clang version 6.0.1 (tags/RELEASE_601/final 335540) (based on
LLVM 6.0.1)
WARNING: WITNESS option enabled, expect reduced performance.
VT(vga): resolution 640x480
CPU: AMD Ryzen 5 1600X Six-Core Processor            (3593.34-MHz
K8-class CPU)
  Origin="AuthenticAMD"  Id=0x800f11  Family=0x17  Model=0x1  Stepping=1
 
Features=0x178bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2,HTT>
 
Features2=0x7ed8320b<SSE3,PCLMULQDQ,MON,SSSE3,FMA,CX16,SSE4.1,SSE4.2,MOVBE,POPCNT,AESNI,XSAVE,OSXSAVE,AVX,F16C,RDRAND>
  AMD Features=0x2e500800<SYSCALL,NX,MMX+,FFXSR,Page1GB,RDTSCP,LM>
  AMD
Features2=0x35c233ff<LAHF,CMP,SVM,ExtAPIC,CR8,ABM,SSE4A,MAS,Prefetch,OSVW,SKINIT,WDT,TCE,Topology,PCXC,PNXC,DBE,PL2I,MWAITX>
  Structured Extended
Features=0x209c01a9<FSGSBASE,BMI1,AVX2,SMEP,BMI2,RDSEED,ADX,SMAP,CLFLUSHOPT,SHA>
  XSAVE Features=0xf<XSAVEOPT,XSAVEC,XINUSE,XSAVES>
  AMD Extended Feature Extensions ID EBX=0x1007<CLZERO,IRPerf,XSaveErPtr>
  SVM: NP,NRIP,VClean,AFlush,DAssist,NAsids=32768
  TSC: P-state invariant, performance statistics
real memory  = 34359738368 (32768 MB)
avail memory = 33255837696 (31715 MB)
Event timer "LAPIC" quality 600
ACPI APIC Table: <ALASKA A M I >
FreeBSD/SMP: Multiprocessor System Detected: 12 CPUs
FreeBSD/SMP: 1 package(s) x 2 cache groups x 3 core(s) x 2 hardware threads
random: unblocking device.
Firmware Warning (ACPI): Optional FADT field Pm2ControlBlock has valid
Length but zero Address: 0x0000000000000000/0x1 (20181003/tbfadt-796)
ioapic0 <Version 2.1> irqs 0-23 on motherboard
ioapic1 <Version 2.1> irqs 24-55 on motherboard
Launching APs: 10 1 2 3 9 11 8 5 7 6 4
Timecounter "TSC-low" frequency 1796668938 Hz quality 1000
random: entropy device external interface
module_register_init: MOD_LOAD (vesa, 0xffffffff810e6a80, 0) error 19
kbd1 at kbdmux0
random: registering fast source Intel Secure Key RNG
random: fast provider: "Intel Secure Key RNG"
netmap: loaded module
[ath_hal] loaded
nexus0
vtvga0: <VT VGA driver> on motherboard
aesni0: <AES-CBC,AES-XTS,AES-GCM,AES-ICM,SHA1,SHA256> on motherboard
cryptosoft0: <software crypto> on motherboard
acpi0: <ALASKA A M I > on motherboard

Adding boot verbose, shows the lines below before the hang.


ACPI: 7 ACPI AML tables successfully acquired and loaded
PCIe: Memory Mapped configuration base _at_ 0xf8000000

The box is hard locked up and I cannot break to debugger either.

Going back to r339385 works. But going to the next commit hangs the box

https://lists.freebsd.org/pipermail/svn-src-head/2018-October/118853.html


    ---Mike




-- 
-------------------
Mike Tancsa, tel +1 519 651 3400 x203
Sentex Communications, mike_at_sentex.net
Providing Internet services since 1994 www.sentex.net
Cambridge, Ontario Canada   
Received on Thu Oct 18 2018 - 13:12:13 UTC

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