On Fri, Jun 10, 2011 at 01:51:40PM +0200, Dawe wrote:
> 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.
No output of trace provided. Please remedy this so we can see what was
actually going on.
Cheers,
-0-
>
> 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
>
--
Never count your chickens before they rip your lips off.
