I tried source updating my 3 weeks old i386 OpenBSD 5.7-current and
after booting the new kernel it crashed after fsck'ing. Just to make
sure, i did an update via latest snapshot, but it crashed again.
(full dmesg below)

OpenBSD 5.7-current (GENERIC.MP) #824: Mon Apr 20 23:23:30 MDT 2015
    [email protected]:/usr/src/sys/arch/i386/compile/GENERIC.MP
cpu0: Intel(R) Xeon(R) CPU E3-1230 v3 @ 3.30GHz ("GenuineIntel" 686-class) 3.30 
GHz
....
setting tty flags
pf enabled
ddb.console: 0 -> 1
starting network
uvm_fault(0xd0b89480, 0xcf9df000, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at      pmap_remove_ptes_86+0x72:       movl    0(%edx),%eax
ddb{0}>


ddb{0}> trace
pmap_remove_ptes_86(daa25100,d45c4f30,cf9dfd60,77f58000,77f59000) at pmap_remov
e_ptes_86+0x72
pmap_do_remove_86(daa25100,77f58000,77f59000,0,daa2a2bc) at pmap_do_remove_86+0
xfc
pmap_remove(daa25100,77f58000,77f59000,d04fc9c9,d0ba7e60) at pmap_remove+0x28
uvm_unmap_kill_entry(daa26120,daa0a580,f54c1f2c,d050bdcd,daa0a580) at uvm_unmap
_kill_entry+0xf8
uvm_map_teardown(daa26120,f54c1f14,2e770bc0,daa0b008,d03a23f0) at uvm_map_teard
own+0xbc
uvmspace_free(daa26120,1,2e770bc0,f54c1f5c,d02032fa) at uvmspace_free+0x2e
uvm_exit(daa1c310,d0b23ac8,4,d09aac8e,0) at uvm_exit+0x15
reaper(daa2270c) at reaper+0xd0


ddb{0}> ps
   PID   PPID   PGRP    UID  S       FLAGS  WAIT          COMMAND
 30843  30854  30854      0  3        0x8b  pause         sh
 30854      1  30854      0  3        0x8b  pause         sh
 10796      0      0      0  3     0x14200  pgzero        zerothread
 20524      0      0      0  3     0x14200  aiodoned      aiodoned
 30711      0      0      0  3     0x14200  syncer        update
   295      0      0      0  3     0x14200  cleaner       cleaner
*18600      0      0      0  7     0x14200                reaper
  8467      0      0      0  3     0x14200  pgdaemon      pagedaemon
 21165      0      0      0  3     0x14200  bored         crypto
 22401      0      0      0  3     0x14200  pftm          pfpurge
 21731      0      0      0  3     0x14200  usbtsk        usbtask
 13690      0      0      0  3     0x14200  usbatsk       usbatsk
  1565      0      0      0  3     0x14200  bored         sensors
 11166      0      0      0  3  0x40014200  acpi0         acpi0
 32510      0      0      0  7  0x40014200                idle3
  7402      0      0      0  7  0x40014200                idle2
 14316      0      0      0  7  0x40014200                idle1
 28105      0      0      0  3     0x14200  bored         softnet
 11715      0      0      0  3     0x14200  bored         systqmp
  6918      0      0      0  3     0x14200  bored         systq
  4056      0      0      0  3  0x40014200                idle0
 24258      0      0      0  3     0x14200  kmalloc       kmthread
     1      0      1      0  3        0x82  wait          init
     0     -1      0      0  3     0x10200  scheduler     swapper


ddb{0}> show registers
ds                  0x10
es                  0x10
fs                  0x20
gs                     0
edi           0x77f58000
esi           0x77f58000
Ebp           0xf54c1e2c
ebx           0x77f59000
edx           0xcf9dfd60        PTmap+0x1dfd60
ecx           0xdaa25100        end+0x9ddbe18
eax           0xd45c4f30        end+0x397bc48
eip           0xd0564ab2        pmap_remove_ptes_86+0x72
cs                   0x8
eflags           0x10202
esp           0xf54c1de4
ss                  0x10
pmap_remove_ptes_86+0x72:       movl    0(%edx),%eax


OpenBSD 5.7-current (GENERIC.MP) #824: Mon Apr 20 23:23:30 MDT 2015
    [email protected]:/usr/src/sys/arch/i386/compile/GENERIC.MP
cpu0: Intel(R) Xeon(R) CPU E3-1230 v3 @ 3.30GHz ("GenuineIntel" 686-class) 3.30 
GHz
cpu0: 
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,NXE,PAGE1GB,LONG,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,LAHF,ABM,PERF,ITSC,FSGSBASE,BMI1,HLE,AVX2,SMEP,BMI2,ERMS,INVPCID,RTM
real mem  = 3715575808 (3543MB)
avail mem = 3642568704 (3473MB)
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: date 04/13/12, SMBIOS rev. 2.7 @ 0xec090 (36 entries)
bios0: vendor American Megatrends Inc. version "1.1a" date 12/03/2013
bios0: Supermicro X10SLH-F/X10SLM+-F
acpi0 at bios0: rev 2
acpi0: sleep states S0 S3 S4 S5
acpi0: tables DSDT FACP APIC FPDT LPIT SSDT SSDT SSDT SSDT MCFG PRAD HPET SSDT 
SSDT SPMI DMAR EINJ ERST HEST BERT
acpi0: wakeup devices PXSX(S4) RP01(S4) PXSX(S4) RP02(S4) PXSX(S4) RP03(S4) 
PXSX(S4) RP04(S4) PXSX(S4) RP05(S4) GLAN(S4) EHC1(S4) EHC2(S4) XHC_(S4) 
HDEF(S4) PEG0(S4) [...]
acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
mtrr: Pentium Pro MTRR support, 10 var ranges, 88 fixed ranges
cpu0: apic clock running at 99MHz
cpu0: mwait min=64, max=64, C-substates=0.2.1.2.4, IBE
cpu1 at mainbus0: apid 2 (application processor)
cpu1: Intel(R) Xeon(R) CPU E3-1230 v3 @ 3.30GHz ("GenuineIntel" 686-class) 3.30 
GHz
cpu1: 
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,NXE,PAGE1GB,LONG,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,LAHF,ABM,PERF,ITSC,FSGSBASE,BMI1,HLE,AVX2,SMEP,BMI2,ERMS,INVPCID,RTM
cpu2 at mainbus0: apid 4 (application processor)
cpu2: Intel(R) Xeon(R) CPU E3-1230 v3 @ 3.30GHz ("GenuineIntel" 686-class) 3.30 
GHz
cpu2: 
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,NXE,PAGE1GB,LONG,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,LAHF,ABM,PERF,ITSC,FSGSBASE,BMI1,HLE,AVX2,SMEP,BMI2,ERMS,INVPCID,RTM
cpu3 at mainbus0: apid 6 (application processor)
cpu3: Intel(R) Xeon(R) CPU E3-1230 v3 @ 3.30GHz ("GenuineIntel" 686-class) 3.30 
GHz
cpu3: 
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,NXE,PAGE1GB,LONG,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,LAHF,ABM,PERF,ITSC,FSGSBASE,BMI1,HLE,AVX2,SMEP,BMI2,ERMS,INVPCID,RTM
ioapic0 at mainbus0: apid 8 pa 0xfec00000, version 20, 24 pins
acpimcfg0 at acpi0 addr 0xf8000000, bus 0-63
acpihpet0 at acpi0: 14318179 Hz
acpiprt0 at acpi0: bus 0 (PCI0)
acpiprt1 at acpi0: bus 1 (RP01)
acpiprt2 at acpi0: bus 3 (RP03)
acpiprt3 at acpi0: bus 4 (RP04)
acpiprt4 at acpi0: bus -1 (PEG0)
acpiprt5 at acpi0: bus -1 (PEG1)
acpiec0 at acpi0: not present
acpicpu0 at acpi0: C1, PSS
acpicpu1 at acpi0: C1, PSS
acpicpu2 at acpi0: C1, PSS
acpicpu3 at acpi0: C1, PSS
acpipwrres0 at acpi0: FN00, resource for FAN0
acpipwrres1 at acpi0: FN01, resource for FAN1
acpipwrres2 at acpi0: FN02, resource for FAN2
acpipwrres3 at acpi0: FN03, resource for FAN3
acpipwrres4 at acpi0: FN04, resource for FAN4
acpitz0 at acpi0: critical temperature is 105 degC
acpitz1 at acpi0: critical temperature is 105 degC
acpibat0 at acpi0: BAT0 not present
acpibat1 at acpi0: BAT1 not present
acpibat2 at acpi0: BAT2 not present
acpibtn0 at acpi0: PWRB
acpibtn1 at acpi0: LID0
acpivideo0 at acpi0: GFX0
acpivout0 at acpivideo0: DD1F
bios0: ROM list: 0xc0000/0x8000
ipmi at mainbus0 not configured
cpu0: Enhanced SpeedStep 3293 MHz: speeds: 3301, 3300, 3100, 2900, 2800, 2600, 
2400, 2200, 2000, 1900, 1700, 1500, 1300, 1200, 1000, 800 MHz
pci0 at mainbus0 bus 0: configuration mode 1 (no bios)
pchb0 at pci0 dev 0 function 0 "Intel Xeon E3-1200 v3 Host" rev 0x06
xhci0 at pci0 dev 20 function 0 "Intel 8 Series xHCI" rev 0x05: msi
usb0 at xhci0: USB revision 3.0
uhub0 at usb0 "Intel xHCI root hub" rev 3.00/1.00 addr 1
"Intel 8 Series MEI" rev 0x04 at pci0 dev 22 function 0 not configured
"Intel 8 Series MEI" rev 0x04 at pci0 dev 22 function 1 not configured
ehci0 at pci0 dev 26 function 0 "Intel 8 Series USB" rev 0x05: apic 8 int 16
usb1 at ehci0: USB revision 2.0
uhub1 at usb1 "Intel EHCI root hub" rev 2.00/1.00 addr 1
ppb0 at pci0 dev 28 function 0 "Intel 8 Series PCIE" rev 0xd5: apic 8 int 16
pci1 at ppb0 bus 1
ppb1 at pci1 dev 0 function 0 "ASPEED Technology AST1150 PCI" rev 0x03
pci2 at ppb1 bus 2
vga1 at pci2 dev 0 function 0 "ASPEED Technology AST2000" rev 0x30
wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
ppb2 at pci0 dev 28 function 2 "Intel 8 Series PCIE" rev 0xd5: apic 8 int 18
pci3 at ppb2 bus 3
em0 at pci3 dev 0 function 0 "Intel I210" rev 0x03: msi, address 
0c:c4:7a:00:c5:bc
ppb3 at pci0 dev 28 function 3 "Intel 8 Series PCIE" rev 0xd5: apic 8 int 19
pci4 at ppb3 bus 4
em1 at pci4 dev 0 function 0 "Intel I210" rev 0x03: msi, address 
0c:c4:7a:00:c5:bd
ehci1 at pci0 dev 29 function 0 "Intel 8 Series USB" rev 0x05: apic 8 int 23
usb2 at ehci1: USB revision 2.0
uhub2 at usb2 "Intel EHCI root hub" rev 2.00/1.00 addr 1
pcib0 at pci0 dev 31 function 0 "Intel C226 LPC" rev 0x05
ahci0 at pci0 dev 31 function 2 "Intel 8 Series AHCI" rev 0x05: msi, AHCI 1.3
ahci0: port 0: 6.0Gb/s
ahci0: port 1: 6.0Gb/s
ahci0: port 2: 1.5Gb/s
scsibus1 at ahci0: 32 targets
sd0 at scsibus1 targ 0 lun 0: <ATA, Samsung SSD 840, EXT0> SCSI3 0/direct fixed 
naa.50025388a02d827c
sd0: 114473MB, 512 bytes/sector, 234441648 sectors, thin
sd1 at scsibus1 targ 1 lun 0: <ATA, Samsung SSD 840, EXT0> SCSI3 0/direct fixed 
naa.50025388a02d827d
sd1: 114473MB, 512 bytes/sector, 234441648 sectors, thin
cd0 at scsibus1 targ 2 lun 0: <HL-DT-ST, DVDRAM GH22NS50, TN03> ATAPI 5/cdrom 
removable
ichiic0 at pci0 dev 31 function 3 "Intel 8 Series SMBus" rev 0x05: apic 8 int 18
iic0 at ichiic0
sdtemp0 at iic0 addr 0x19: at30ts00
sdtemp1 at iic0 addr 0x1b: at30ts00
spdmem0 at iic0 addr 0x51: 8GB DDR3 SDRAM ECC PC3-12800 with thermal sensor
spdmem1 at iic0 addr 0x53: 8GB DDR3 SDRAM ECC PC3-12800 with thermal sensor
"Intel 8 Series Thermal" rev 0x05 at pci0 dev 31 function 6 not configured
isa0 at pcib0
isadma0 at isa0
com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
com0: console
com1 at isa0 port 0x2f8/8 irq 3: ns16550a, 16 byte fifo
com2 at isa0 port 0x3e8/8 irq 5: ns16550a, 16 byte fifo
pckbc0 at isa0 port 0x60/5
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
wbsio0 at isa0 port 0x2e/2: NCT6776F rev 0x33
lm1 at wbsio0 port 0xa30/8: NCT6776F
npx0 at isa0 port 0xf0/16: reported by CPUID; using exception 16
uhidev0 at uhub0 port 6 configuration 1 interface 0 "Cherry Mikroschalter 
product 0x0023" rev 2.00/0.32 addr 2
uhidev0: iclass 3/1
ukbd0 at uhidev0: 8 variable keys, 6 key codes
wskbd0 at ukbd0: console keyboard, using wsdisplay0
uhidev1 at uhub0 port 6 configuration 1 interface 1 "Cherry Mikroschalter 
product 0x0023" rev 2.00/0.32 addr 2
uhidev1: iclass 3/0, 2 report ids
uhid0 at uhidev1 reportid 1: input=2, output=0, feature=0
uhid1 at uhidev1 reportid 2: input=1, output=0, feature=0
uhub3 at uhub0 port 7 "vendor 0x0000 product 0x0001" rev 2.00/0.00 addr 3
uhub3: device problem, disabling port 1
uhub4 at uhub1 port 1 "Intel Rate Matching Hub" rev 2.00/0.05 addr 2
uhub5 at uhub2 port 1 "Intel Rate Matching Hub" rev 2.00/0.05 addr 2
vscsi0 at root
scsibus2 at vscsi0: 256 targets
softraid0 at root
scsibus3 at softraid0: 256 targets
root on sd1a (50a432f7580e264a.a) swap on sd1b dump on sd1b


-- 
Mark Patruck ( mark at wrapped.cx )
GPG key 0xF2865E51 / 187F F6D3 EE04 1DCE 1C74  F644 0D3C F66F F286 5E51

http://www.wrapped.cx

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