KDB: debugger backends: ddb
	KDB: current backend: ddb
	---<<BOOT>>---
	Copyright (c) 1992-2019 The FreeBSD Project.
	Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
		The Regents of the University of California. All rights reserved.
	FreeBSD is a registered trademark of The FreeBSD Foundation.
	FreeBSD 13.0-CURRENT #0 r354589: Sun Nov 17 15:55:34 CET 2019
	    pho@mercat1.netperf.freebsd.org:/usr/src/sys/amd64/compile/PHO amd64
	FreeBSD clang version 9.0.0 (tags/RELEASE_900/final 372316) (based on LLVM 9.0.0)
	WARNING: WITNESS option enabled, expect reduced performance.
	WARNING: DIAGNOSTIC option enabled, expect reduced performance.
	Entering uma_startup with 10 boot pages configured
	startup_alloc from "UMA Kegs", 8 boot pages left
	startup_alloc from "UMA Zones", 7 boot pages left
	startup_alloc from "UMA Zones", 6 boot pages left
	startup_alloc from "UMA Zones", 5 boot pages left
	startup_alloc from "UMA Zones", 4 boot pages left
	startup_alloc from "UMA Zones", 3 boot pages left
	startup_alloc from "UMA Hash", 2 boot pages left
	startup_alloc from "UMA Zones", 1 boot pages left
	Entering uma_startup1 with 0 boot pages left
	Entering uma_startup2 with 0 boot pages left
	VT(vga): resolution 640x480
	CPU: Intel(R) Xeon(R) CPU E5-1650 v3 @ 3.50GHz (3500.07-MHz K8-class CPU)
	  Origin="GenuineIntel"  Id=0x306f2  Family=0x6  Model=0x3f  Stepping=2
	  Features=0xbfebfbff<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=0x7ffefbff<SSE3,PCLMULQDQ,DTES64,MON,DS_CPL,VMX,SMX,EST,TM2,SSSE3,SDBG,FMA,CX16,xTPR,PDCM,PCID,DCA,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,TSCDLT,AESNI,XSAVE,OSXSAVE,AVX,F16C,RDRAND>
	  AMD Features=0x2c100800<SYSCALL,NX,Page1GB,RDTSCP,LM>
	  AMD Features2=0x21<LAHF,ABM>
	  Structured Extended Features=0x37ab<FSGSBASE,TSCADJ,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,PQM,NFPUSG>
	  XSAVE Features=0x1<XSAVEOPT>
	  VT-x: PAT,HLT,MTF,PAUSE,EPT,UG,VPID,VID,PostIntr
	  TSC: P-state invariant, performance statistics
	real memory  = 34359738368 (32768 MB)
	avail memory = 33166225408 (31629 MB)
	Event timer "LAPIC" quality 600
	ACPI APIC Table: <SUPERM SMCI--MB>
	FreeBSD/SMP: Multiprocessor System Detected: 12 CPUs
	FreeBSD/SMP: 1 package(s) x 6 core(s) x 2 hardware threads
	random: registering fast source Intel Secure Key RNG
	random: fast provider: "Intel Secure Key RNG"
	arc4random: WARNING: initial seeding bypassed the cryptographic random device because it was not yet seeded and the knob 'bypass_before_seeding' was enabled.
	ioapic0 <Version 2.0> irqs 0-23
	ioapic1 <Version 2.0> irqs 24-47
	Launching APs: 1 2 6 4 10 5 9 3 11 8 7
	Timecounter "TSC-low" frequency 1750034172 Hz quality 1000
	random: entropy device external interface
	kbd1 at kbdmux0
	module_register_init: MOD_LOAD (vesa, 0xffffffff80fb4560, 0) error 19
	000.000055 [4336] netmap_init               netmap: loaded module
	[ath_hal] loaded
	nexus0
	vtvga0: <VT VGA driver>
	cryptosoft0: <software crypto>
	acpi0: <SUPERM SMCI--MB>
	acpi0: Power Button (fixed)
	cpu0: <ACPI CPU> on acpi0
	atrtc0: <AT realtime clock> port 0x70-0x71,0x74-0x77 irq 8 on acpi0
	atrtc0: registered as a time-of-day clock, resolution 1.000000s
	Event timer "RTC" frequency 32768 Hz quality 0
	attimer0: <AT timer> port 0x40-0x43,0x50-0x53 irq 0 on acpi0
	Timecounter "i8254" frequency 1193182 Hz quality 0
	Event timer "i8254" frequency 1193182 Hz quality 100
	hpet0: <High Precision Event Timer> iomem 0xfed00000-0xfed003ff on acpi0
	Timecounter "HPET" frequency 14318180 Hz quality 950
	Event timer "HPET" frequency 14318180 Hz quality 350
	Event timer "HPET1" frequency 14318180 Hz quality 340
	Event timer "HPET2" frequency 14318180 Hz quality 340
	Event timer "HPET3" frequency 14318180 Hz quality 340
	Event timer "HPET4" frequency 14318180 Hz quality 340
	Event timer "HPET5" frequency 14318180 Hz quality 340
	Event timer "HPET6" frequency 14318180 Hz quality 340
	Event timer "HPET7" frequency 14318180 Hz quality 340
	Timecounter "ACPI-fast" frequency 3579545 Hz quality 900
	acpi_timer0: <24-bit timer at 3.579545MHz> port 0x408-0x40b on acpi0
	pcib0: <ACPI Host-PCI bridge> on acpi0
	pci0: <ACPI PCI bus> on pcib0
	pci0: <dasp, performance counters> at device 11.1 (no driver attached)
	pci0: <dasp, performance counters> at device 11.2 (no driver attached)
	pci0: <dasp, performance counters> at device 16.1 (no driver attached)
	pci0: <dasp, performance counters> at device 16.6 (no driver attached)
	pci0: <dasp, performance counters> at device 18.1 (no driver attached)
	acpi_syscontainer0: <System Container> on acpi0
	acpi_syscontainer1: <System Container> on acpi0
	acpi_syscontainer2: <System Container> on acpi0
	acpi_syscontainer3: <System Container> on acpi0
	pcib1: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
	pci1: <ACPI PCI bus> on pcib1
	pcib2: <ACPI PCI-PCI bridge> irq 26 at device 1.0 on pci1
	pci2: <ACPI PCI bus> on pcib2
	pcib3: <ACPI PCI-PCI bridge> irq 32 at device 2.0 on pci1
	pci3: <ACPI PCI bus> on pcib3
	pci3: <network, ethernet> at device 0.0 (no driver attached)
	pci3: <network, ethernet> at device 0.1 (no driver attached)
	pcib4: <ACPI PCI-PCI bridge> irq 40 at device 3.0 on pci1
	pci4: <ACPI PCI bus> on pcib4
	pci1: <unknown> at device 17.0 (no driver attached)
	ahci0: <Intel Wellsburg AHCI SATA controller> port 0xf110-0xf117,0xf100-0xf103,0xf0f0-0xf0f7,0xf0e0-0xf0e3,0xf020-0xf03f mem 0xfb438000-0xfb4387ff irq 16 at device 17.4 on pci1
	ahci0: AHCI v1.30 with 4 6Gbps ports, Port Multiplier not supported
	ahcich0: <AHCI channel> at channel 0 on ahci0
	ahcich1: <AHCI channel> at channel 1 on ahci0
	ahcich2: <AHCI channel> at channel 2 on ahci0
	ahcich3: <AHCI channel> at channel 3 on ahci0
	ahciem0: <AHCI enclosure management bridge> on ahci0
	xhci0: <Intel Wellsburg USB 3.0 controller> mem 0xfb400000-0xfb40ffff irq 19 at device 20.0 on pci1
	xhci0: 32 bytes context size, 64-bit DMA
	usbus0 on xhci0
	usbus0: 5.0Gbps Super Speed USB v3.0
	pci1: <simple comms> at device 22.0 (no driver attached)
	pci1: <simple comms> at device 22.1 (no driver attached)
	ehci0: <Intel Wellsburg USB 2.0 controller> mem 0xfb434000-0xfb4343ff irq 18 at device 26.0 on pci1
	usbus1: EHCI version 1.0
	usbus1 on ehci0
	usbus1: 480Mbps High Speed USB v2.0
	pcib5: <ACPI PCI-PCI bridge> irq 16 at device 28.0 on pci1
	pci5: <ACPI PCI bus> on pcib5
	pcib6: <ACPI PCI-PCI bridge> irq 18 at device 28.2 on pci1
	pci6: <ACPI PCI bus> on pcib6
	pcib7: <ACPI PCI-PCI bridge> at device 0.0 on pci6
	pci7: <ACPI PCI bus> on pcib7
	vgapci0: <VGA-compatible display> port 0xe000-0xe07f mem 0xfa000000-0xfaffffff,0xfb000000-0xfb01ffff irq 18 at device 0.0 on pci7
	vgapci0: Boot video device
	pcib8: <ACPI PCI-PCI bridge> irq 16 at device 28.4 on pci1
	pci8: <ACPI PCI bus> on pcib8
	igb0: <Intel(R) PRO/1000 PCI-Express Network Driver> port 0xd020-0xd03f mem 0xfb320000-0xfb33ffff,0xfb344000-0xfb347fff irq 16 at device 0.0 on pci8
	igb0: Using 1024 TX descriptors and 1024 RX descriptors
	igb0: queue equality override not set, ukbd0
	.
	lo0: link state changed to UP
	ff:fea8:cdda%igb0 prefixlen 64 scopeid 0x1
		media: Ethernet autoselect
		status: no carrier
		nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
	igb1: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
		options=4e507bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWFILTER,VLAN_HWTSO,RXCSUM_IPV6,TXCSUM_IPV6,NOMAP>
		ether 0c:c4:7a:a8:cd:db
		media: Ethernet autoselect
		status: no carrier
		nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
	Starting devd.
	igb0: link state changed to UP
	Autoloading module: ioat.ko
	ioat0: <HSW IOAT Ch0> mem 0xfb42c000-0xfb42ffff irq 31 at device 4.0 on pci1
	ioat0: Capabilities: 2f7<PQ,Extended_APIC_ID,Block_Fill,Move_CRC,DCA,Marker_Skipping,CRC,Page_Break>
	ioat1: <HSW IOAT Ch1> mem 0xfb428000-0xfb42bfff irq 39 at device 4.1 on pci1
	ioat1: Capabilities: 2f7<PQ,Extended_APIC_ID,Block_Fill,Move_CRC,DCA,Marker_Skipping,CRC,Page_Break>
	ioat2: <HSW IOAT Ch2> mem 0xfb424000-0xfb427fff irq 31 at device 4.2 on pci1
	ioat2: Capabilities: f7<Extended_APIC_ID,Block_Fill,Move_CRC,DCA,Marker_Skipping,CRC,Page_Break>
	ioat3: <HSW IOAT Ch3> mem 0xfb420000-0xfb423fff irq 39 at device 4.3 on pci1
	ioat3: Capabilities: f7<Extended_APIC_ID,Block_Fill,Move_CRC,DCA,Marker_Skipping,CRC,Page_Break>
	ioat4: <HSW IOAT Ch4> mem 0xfb41c000-0xfb41ffff irq 31 at device 4.4 on pci1
	ioat4: Capabilities: f7<Extended_APIC_ID,Block_Fill,Move_CRC,DCA,Marker_Skipping,CRC,Page_Break>
	ioat5: <HSW IOAT Ch5> mem 0xfb418000-0xfb41bfff irq 39 at device 4.5 on pci1
	ioat5: Capabilities: f7<Extended_APIC_ID,Block_Fill,Move_CRC,DCA,Marker_Skipping,CRC,Page_Break>
	ioat6: <HSW IOAT Ch6> mem 0xfb414000-0xfb417fff irq 31 at device 4.6 on pci1
	ioat6: Capabilities: f7<Extended_APIC_ID,Block_Fill,Move_CRC,DCA,Marker_Skipping,CRC,Page_Break>
	ioat7: <HSW IOAT Ch7> mem 0xfb410000-0xfb413fff irq 39 at device 4.7 on pci1
	ioat7: Capabilities: f7<Extended_APIC_ID,Block_Fill,Move_CRC,DCA,Marker_Skipping,CRC,Page_Break>
	Autoloading module: ioat.ko
	Autoloading module: ioat.ko
	Autoloading module: ioat.ko
	Autoloading module: ioat.ko
	Autoloading module: ioat.ko
	Autoloading module: ioat.ko
	Autoloading module: ioat.ko
	Starting Network: igb1.
	igb1: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
		options=4e507bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWFILTER,VLAN_HWTSO,RXCSUM_IPV6,TXCSUM_IPV6,NOMAP>
		ether 0c:c4:7a:a8:cd:db
		media: Ethernet autoselect
		status: no carrier
		nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
	Autoloading module: uhid.ko
	Autoloading module: ums.ko
	ums0 on uhub4
	ums0: <vendor 0x0557 product 0x2419, class 0/0, rev 1.10/1.00, addr 2> on usbus0
	ums0: 3 buttons and [Z] coordinates ID=0
	Starting dhclient.
	DHCPREQUEST on igb0 to 255.255.255.255 port 67
	DHCPACK from 192if_delmulti_locked: detaching ifnet instance 0xfffff80006007000
	.168.5.1
	bound to 192.168.5.171 -- renewal in 300 seconds.
	add host 127.0.0.1: gateway lo0 fib 0: route already in table
	add host ::1: gateway lo0 fib 0: route already in table
	add net fe80::: gateway ::1
	add net ff02::: gateway ::1
	add net ::ffff:0.0.0.0: gateway ::1
	add net ::0.0.0.0: gateway ::1
	Creating and/or trimming log files.
	Starting syslogd.
	Setting date via ntp.
	18 Nov 07:51:58 ntpdate[2055]: step time server 192.168.5.1 offset -0.643609 sec
	Starting rpcbind.
	NFS access cache time=60
	Starting watchdogd.
	No core dumps found.
	Clearing /tmp (X related).
	Starting statd.
	Starting lockd.
	Recovering vi editor sessions:.
	 fscklock order reversal:
	 1st 0xfffff80003fd9a48 ufs (ufs) @ kern/vfs_mount.c:1603
	 2nd 0xfffff8000737a2e0 devfs (devfs) @ ufs/ffs/ffs_softdep.c:1927
	stack backtrace:
	#0 0xffffffff80c30eb1 at witness_debugger+0x71
	#1 0xffffffff80c30c21 at witness_checkorder+0xab1
	#2 0xffffffff80b96b78 at lockmgr_lock_fast_path+0x178
	#3 0xffffffff810dc3f2 at VOP_LOCK1_APV+0x92
	#4 0xffffffff80cb1205 at _vn_lock+0x65
	#5 0xffffffff80ebe35d at softdep_flushworklist+0x5d
	#6 0xffffffff80edf2f6 at ffs_sync+0x406
	#7 0xffffffff80c9553a at dounmount+0x46a
	#8 0xffffffff80c9507e at sys_unmount+0x2ae
	#9 0xffffffff81062610 at amd64_syscall+0x2d0
	#10 0xffffffff810381e0 at fast_syscall_common+0x101
	** /dev/gpt/tmp
	** Last Mounted on /tmp
	** Phase 1 - Check Blocks and Sizes
	** Phase 2 - Check Pathnames
	** Phase 3 - Check Connectivity
	** Phase 4 - Check Reference Counts
	** Phase 5 - Check Cyl groups
	FREE BLK COUNT(S) WRONG IN SUPERBLK
	SALVAGE? yes
	
	237 files, 21711 used, 1243696 free (160 frags, 155442 blocks, 0.0% fragmentation)
	
	***** FILE SYSTEM MARKED CLEAN *****
	
	***** FILE SYSTEM WAS MODIFIED *****
	Updating motd:.
	Mounting late filesystems:.
	Security policy loaded: MAC/ntpd (mac_ntpd)
	Starting ntpd.
	Starting powerd.
	Configuring vt: blanktime.
	Performing sanity check on sshd configuration.
	Starting sshd.
	Starting cron.
	
	Mon Nov 18 07:52
	FreeBSD/amd64 (mercat1.netperf.freebsd.org) (ttyu1)
	
	login: root
	Nov 18 07:52:10 mercat1 login[2337]: ROOT LOGIN (root) ON ttyu1
	Last login: Mon Nov 18 06:39:39 on ttyu1
	FreeBSD 13.0-CURRENT (PHO) #0 r354589: Sun Nov 17 15:55:34 CET 2019
	root@mercat1:~ # Nov 18 07:53:01 mercat1 su[2358]: pho to root on /dev/pts/0
	su - pho
	physmem: 31.86 GB (34212982784).
	debug.vmmap_check is enabled
	find /usr/src/sys -name "*.rej" -ls
	sysctl debug.vmem_check debug.vmmap_check
	debug.vmem_check: 0
	debug.vmmap_check: 1
	[pho@mercat1 ~]$ cd /tmp
	[pho@mercat1 /tmp]$ while true; do
	> date +%T
	> ./badcode -t 2m -i 20 -v
	> done
	07:54:11
	 badcode: run time  0+00:02:00, incarnations  18, load 100, verbose 1
	Nov 18 07:54:12 mercat1 badcode[2406]: stack overflow detected; terminated
	Nov 18 07:54:12 mercat1 badcode[2416]: stack overflow detected; terminated
	Nov 18 07:54:12 mercat1 badcode[2427]: stack overflow detected; terminated
	Nov 18 07:54:12 mercat1 badcode[2433]: stack overflow detected; terminated
	Nov 18 07:54:13 mercat1 badcode[2437]: stack overflow detected; terminated
	Nov 18 07:54:13 mercat1 badcode[2439]: stack overflow detected; terminated
	Nov 18 07:54:13 mercat1 badcode[2454]: stack overflow detected; terminated
	Nov 18 07:54:13 mercat1 badcode[2455]: stack overflow detected; terminated
	Nov 18 07:54:13 mercat1 badcode[2468]: stack overflow detected; terminated
	Nov 18 07:54:13 mercat1 badcode[2486]: stack overflow detected; terminated
	Nov 18 07:54:13 mercat1 badcode[2494]: stack overflow detected; terminated
	Nov 18 07:54:13 mercat1 badcode[2500]: stack overflow detected; terminated
	Nov 18 07:54:13 mercat1 badcode[2504]: stack overflow detected; terminated
	Nov 18 07:54:13 mercat1 badcode[2530]: stack overflow detected; terminated
	Nov 18 07:54:13 mercat1 badcode[2535]: stack overflow detected; terminated
	Nov 18 07:54:13 mercat1 badcode[2546]: stack overflow detected; terminated
	Nov 18 07:54:13 mercat1 badcode[2554]: stack overflow detected; terminated
	Nov 18 07:54:13 mercat1 badcode[2562]: stack overflow detected; terminated
	Nov 18 07:54:13 mercat1 badcode[2568]: stack overflow detected; terminated
:
:
	Nov 18 08:00:31 mercat1 badcode[59993]: stack overflow detected; terminated
	Nov 18 08:00:31 mercat1 badcode[59996]: stack overflow detected; terminated
	Nov 18 08:00:31 mercat1 badcode[60039]: stack overflow detected; terminated
	Nov 18 08:00:31 mercat1 badcode[60049]: stack overflow detected; terminated
	Nov 18 08:00:31 mercat1 badcode[60050]: stack overflow detec
<I first did a "power diag" and then a "power cycle">
FlexBoot v3.4.650
FlexBoot (http://mellanox.com) 02:00.0 3D00 PCI3.00 PnP PMM+205E3000+205FA000