Hi,
I can reliably trigger an uvm_fault on two current amd64 systems with the
following steps:
- start an xterm
- maximize it
- start ghci
- type ":m + <TAB>"
- answer the question with "y"
-> uvm_fault (no keyboard response)
uvm_fault(0xfffffe803cb76820, 0x0, 0, 4) -> e
kernel: page fault trap, code=0
Stopped at 0: uvm_fault(0xfffffe803cb76820, 0x0, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at db_read_bytes+0x20: movzbl 0(%rdi,%rcx,1),%eax
ddb{1}>
(handtyped)
You can trigger the fault remotely over ssh, too.
But not as reliable as with the above steps.
I'm getting the fault in cwm and fvwm but never on the local console outside of
X.
Using rxvt as a terminal doesn't trigger it so far.
Keeping the xterm in its original size also doesn't trigger the bug, resizing it
only slightly is sometimes enough for the fault to happen.
I can reproduce it with the vesa driver, too.
Setting kern.bufcachepercent=5 has no effect.
If someone has further ideas to analyze this, I'd be happy to help.
Thanks.
OpenBSD 4.9-current (GENERIC.MP) #97: Mon Jun 6 15:58:51 MDT 2011
[email protected]:/usr/src/sys/arch/amd64/compile/GENERIC.MP
real mem = 1062203392 (1012MB)
avail mem = 1019850752 (972MB)
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.3 @ 0xf0450 (77 entries)
bios0: vendor Dell Inc. version "2.6.1" date 12/06/2007
bios0: Dell Inc. OptiPlex 745
acpi0 at bios0: rev 2
acpi0: sleep states S0 S1 S3 S4 S5
acpi0: tables DSDT FACP SSDT APIC BOOT ASF! MCFG HPET SLIC SSDT SSDT SSDT
acpi0: wakeup devices VBTN(S4) PCI0(S5) PCI4(S5) PCI2(S5) PCI3(S5) PCI1(S5)
PCI5(S5) PCI6(S5) MOU_(S3) USB0(S3) USB1(S3) USB2(S3) USB3(S3) USB4(S3)
acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: Intel(R) Core(TM)2 CPU 6300 @ 1.86GHz, 1860.92 MHz
cpu0:
FPU,VME,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,SBF,SSE3,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,NXE,LONG
cpu0: 2MB 64b/line 8-way L2 cache
cpu0: apic clock running at 265MHz
cpu1 at mainbus0: apid 1 (application processor)
cpu1: Intel(R) Core(TM)2 CPU 6300 @ 1.86GHz, 1860.65 MHz
cpu1:
FPU,VME,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,SBF,SSE3,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,NXE,LONG
cpu1: 2MB 64b/line 8-way L2 cache
ioapic0 at mainbus0: apid 8 pa 0xfec00000, version 20, 24 pins
ioapic0: misconfigured as apic 0, remapped to apid 8
acpimcfg0 at acpi0 addr 0xe0000000, bus 0-255
acpihpet0 at acpi0: 14318179 Hz
acpiprt0 at acpi0: bus 3 (PCI4)
acpiprt1 at acpi0: bus 1 (PCI2)
acpiprt2 at acpi0: bus -1 (PCI3)
acpiprt3 at acpi0: bus -1 (PCI1)
acpiprt4 at acpi0: bus 2 (PCI5)
acpiprt5 at acpi0: bus -1 (PCI6)
acpiprt6 at acpi0: bus 0 (PCI0)
acpicpu0 at acpi0: PSS
acpicpu1 at acpi0: PSS
acpibtn0 at acpi0: VBTN
cpu0: Enhanced SpeedStep 1860 MHz: speeds: 1867, 1600 MHz
memory map conflict 0x3f603c00/0x9fc400
pci0 at mainbus0 bus 0
pchb0 at pci0 dev 0 function 0 "Intel 82Q965 Host" rev 0x02
vga1 at pci0 dev 2 function 0 "Intel 82Q965 Video" rev 0x02
wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
intagp0 at vga1
agp0 at intagp0: aperture at 0xd0000000, size 0x10000000
inteldrm0 at vga1: msi
drm0 at inteldrm0
"Intel 82Q965 Video" rev 0x02 at pci0 dev 2 function 1 not configured
uhci0 at pci0 dev 26 function 0 "Intel 82801H USB" rev 0x02: apic 8 int 16
uhci1 at pci0 dev 26 function 1 "Intel 82801H USB" rev 0x02: apic 8 int 17
ehci0 at pci0 dev 26 function 7 "Intel 82801H USB" rev 0x02: apic 8 int 22
usb0 at ehci0: USB revision 2.0
uhub0 at usb0 "Intel EHCI root hub" rev 2.00/1.00 addr 1
azalia0 at pci0 dev 27 function 0 "Intel 82801H HD Audio" rev 0x02: msi
azalia0: codecs: Analog Devices AD1983
audio0 at azalia0
ppb0 at pci0 dev 28 function 0 "Intel 82801H PCIE" rev 0x02: apic 8 int 16
pci1 at ppb0 bus 1
ppb1 at pci0 dev 28 function 4 "Intel 82801H PCIE" rev 0x02: apic 8 int 16
pci2 at ppb1 bus 2
bge0 at pci2 dev 0 function 0 "Broadcom BCM5754" rev 0x02, BCM5754/5787 A2
(0xb002): apic 8 int 16, address 00:18:8b:69:fe:dd
brgphy0 at bge0 phy 1: BCM5787 10/100/1000baseT PHY, rev. 0
uhci2 at pci0 dev 29 function 0 "Intel 82801H USB" rev 0x02: apic 8 int 23
uhci3 at pci0 dev 29 function 1 "Intel 82801H USB" rev 0x02: apic 8 int 17
uhci4 at pci0 dev 29 function 2 "Intel 82801H USB" rev 0x02: apic 8 int 18
ehci1 at pci0 dev 29 function 7 "Intel 82801H USB" rev 0x02: apic 8 int 23
usb1 at ehci1: USB revision 2.0
uhub1 at usb1 "Intel EHCI root hub" rev 2.00/1.00 addr 1
ppb2 at pci0 dev 30 function 0 "Intel 82801BA Hub-to-PCI" rev 0xf2
pci3 at ppb2 bus 3
pcib0 at pci0 dev 31 function 0 "Intel 82801H LPC" rev 0x02
pciide0 at pci0 dev 31 function 2 "Intel 82801H SATA" rev 0x02: DMA, channel 0
configured to native-PCI, channel 1 configured to native-PCI
pciide0: using apic 8 int 20 for native-PCI interrupt
wd0 at pciide0 channel 0 drive 0: <SAMSUNG HD103UJ>
wd0: 16-sector PIO, LBA48, 953869MB, 1953525168 sectors
wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 6
atapiscsi0 at pciide0 channel 1 drive 0
scsibus0 at atapiscsi0: 2 targets
cd0 at scsibus0 targ 0 lun 0: <SONY, DVD-ROM DDU810A, KD38> ATAPI 5/cdrom
removable
cd0(pciide0:1:0): using PIO mode 4, Ultra-DMA mode 2
ichiic0 at pci0 dev 31 function 3 "Intel 82801H SMBus" rev 0x02: apic 8 int 20
iic0 at ichiic0
spdmem0 at iic0 addr 0x50: 1GB DDR2 SDRAM non-parity PC2-5300CL5
pciide1 at pci0 dev 31 function 5 "Intel 82801H SATA" rev 0x02: DMA, channel 0
wired to native-PCI, channel 1 wired to native-PCI
pciide1: using apic 8 int 20 for native-PCI interrupt
usb2 at uhci0: USB revision 1.0
uhub2 at usb2 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb3 at uhci1: USB revision 1.0
uhub3 at usb3 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb4 at uhci2: USB revision 1.0
uhub4 at usb4 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb5 at uhci3: USB revision 1.0
uhub5 at usb5 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb6 at uhci4: USB revision 1.0
uhub6 at usb6 "Intel UHCI root hub" rev 1.00/1.00 addr 1
isa0 at pcib0
isadma0 at isa0
com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
com1 at isa0 port 0x2f8/8 irq 3: ns16550a, 16 byte fifo
pckbc0 at isa0 port 0x60/5
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
lpt0 at isa0 port 0x378/4 irq 7
mtrr: Pentium Pro MTRR support
uhidev0 at uhub2 port 1 configuration 1 interface 0 "Microsoft Natural\M-.
Ergonomic Keyboard 4000" rev 2.00/1.73 addr 2
uhidev0: iclass 3/1
ukbd0 at uhidev0: 8 modifier keys, 6 key codes
wskbd1 at ukbd0 mux 1
wskbd1: connecting to wsdisplay0
uhidev1 at uhub2 port 1 configuration 1 interface 1 "Microsoft Natural\M-.
Ergonomic Keyboard 4000" rev 2.00/1.73 addr 2
uhidev1: iclass 3/0, 1 report id
uhid0 at uhidev1 reportid 1: input=7, output=0, feature=0
uhidev2 at uhub2 port 2 configuration 1 interface 0 "Logitech USB-PS/2 Optical
Mouse" rev 2.00/27.30 addr 3
uhidev2: iclass 3/1
ums0 at uhidev2: 8 buttons, Z dir
wsmouse0 at ums0 mux 0
uhidev3 at uhub6 port 1 configuration 1 interface 0 "PIXART USB OPTICAL MOUSE"
rev 1.10/1.00 addr 2
uhidev3: iclass 3/1
ums1 at uhidev3: 5 buttons, Z dir
wsmouse1 at ums1 mux 0
vscsi0 at root
scsibus1 at vscsi0: 256 targets
softraid0 at root
scsibus2 at softraid0: 256 targets
root on wd0a (9729741b5e39df7e.a) swap on wd0b dump on wd0b
WARNING: / was not properly unmounted
softraid0: sd0 was not shutdown properly
softraid0: sd0 was not shutdown properly
sd0 at scsibus2 targ 1 lun 0: <OPENBSD, SR CRYPTO, 004> SCSI2 0/direct fixed
sd0: 307199MB, 512 bytes/sec, 629145072 sec total
softraid0: sd1 was not shutdown properly
softraid0: sd1 was not shutdown properly
sd1 at scsibus2 targ 2 lun 0: <OPENBSD, SR CRYPTO, 004> SCSI2 0/direct fixed
sd1: 511997MB, 512 bytes/sec, 1048570454 sec total
