Op 3 jul. 2012 om 17:54 heeft Jan Stary <h...@stare.cz> het volgende
geschreven:
> On Jul 03 10:32:29, Amit Kulkarni wrote:
>>> This is 5.1-beta/i386 on an ALIX about five years old,
>>> running as my home server.
>>>
>>> Recently, processes started to die for reasons unknown, as in
>>>
>>> pid 20260 (postgres): user write of 118784@0x28052000 at 159088 failed:
14
>>> pid 1872 (cron): user write of 118784@0x2b1e3000 at 30224 failed: 14
>>>
>>> 14 is EFAULT as per sys/errno,h
>>> - what can be causing it?
This message is printed when the function that tries to read memory and write
a core file fails.
This is very likely bad memory, causing segmentation faults and then a failure
to read the memory while writing a coredump.
-Otto
>>
>> first check if filesystem is full.
>
> Filesystem Size Used Avail Capacity Mounted on
> /dev/wd0a 196M 113M 73.6M 61% /
> /dev/wd0d 490M 421M 44.2M 90% /usr
> /dev/wd0e 1.6G 382M 1.1G 25% /usr/local
> /dev/wd0g 48.5M 7.4M 38.7M 16% /var
> /dev/wd0h 49.0M 22.8M 23.7M 49% /var/log
> /dev/wd0i 49.0M 20.2M 26.4M 43% /var/mail
> /dev/wd0j 197M 23.6M 164M 13% /var/mysql
> /dev/wd0k 97.8M 39.9M 53.0M 43% /var/postgresql
> /dev/wd0l 49.0M 16.3M 30.3M 35% /var/spool
> /dev/wd0m 4.9G 3.3G 1.3G 71% /var/www
> /dev/wd0n 1005M 34.0K 954M 0% /tmp
> /dev/wd0o 5.0G 2.9G 1.8G 61% /home
>
> Can you please elaborate how a lack of disk space
> would result in an EFAULT?
>
>
>> how much is swap configured?
>
> swapctl: no swap devices configured
>
> The machine doesn't do much, and so far the 128M of RAM was enough.
> I will reinstall with a swap partition if it makes a difference -
> should lack of swap result in an EFAULT?
>
> Jan
>
>
>>> It usually happens under a stress (the machine is pretty scarse
>>> on resources, so 'stress' can be accepting a batch of DNS queries).
>>> For example, the postgres EFAULT above happened exactly when a batch
>>> of emails arrived.
>>>
>>> Is this a memory problem? My login.conf limits all classes
>>> to datasize-cur=100M. Can this be a memory HW problem?
>>>
>>> Jan
>>>
>>>
>>>
>>> OpenBSD 5.1-beta (GENERIC) #140: Sat Jan 21 00:40:23 MST 2012
>>> dera...@i386.openbsd.org:/usr/src/sys/arch/i386/compile/GENERIC
>>> cpu0: Geode(TM) Integrated Processor by AMD PCS ("AuthenticAMD" 586-class)
432 MHz
>>> cpu0: FPU,DE,PSE,TSC,MSR,CX8,SEP,PGE,CMOV,CFLUSH,MMX,MMXX,3DNOW2,3DNOW
>>> real mem = 133758976 (127MB)
>>> avail mem = 121544704 (115MB)
>>> mainbus0 at root
>>> bios0 at mainbus0: AT/286+ BIOS, date 12/10/07, BIOS32 rev. 0 @ 0xfceb2
>>> pcibios0 at bios0: rev 2.1 @ 0xf0000/0x10000
>>> pcibios0: pcibios_get_intr_routing - function not supported
>>> pcibios0: PCI IRQ Routing information unavailable.
>>> pcibios0: PCI bus #0 is the last bus
>>> bios0: ROM list: 0xe0000/0xa800
>>> cpu0 at mainbus0: (uniprocessor)
>>> pci0 at mainbus0 bus 0: configuration mode 1 (bios)
>>> pchb0 at pci0 dev 1 function 0 "AMD Geode LX" rev 0x31
>>> glxsb0 at pci0 dev 1 function 2 "AMD Geode LX Crypto" rev 0x00: RNG AES
>>> vr0 at pci0 dev 9 function 0 "VIA VT6105M RhineIII" rev 0x96: irq 10,
address 00:0d:b9:12:9f:2c
>>> ukphy0 at vr0 phy 1: Generic IEEE 802.3u media interface, rev. 3: OUI
0x004063, model 0x0034
>>> vr1 at pci0 dev 10 function 0 "VIA VT6105M RhineIII" rev 0x96: irq 11,
address 00:0d:b9:12:9f:2d
>>> ukphy1 at vr1 phy 1: Generic IEEE 802.3u media interface, rev. 3: OUI
0x004063, model 0x0034
>>> vr2 at pci0 dev 11 function 0 "VIA VT6105M RhineIII" rev 0x96: irq 12,
address 00:0d:b9:12:9f:2e
>>> ukphy2 at vr2 phy 1: Generic IEEE 802.3u media interface, rev. 3: OUI
0x004063, model 0x0034
>>> ral0 at pci0 dev 12 function 0 "Ralink RT2560" rev 0x01: irq 9, address
00:11:09:0d:d3:36
>>> ral0: MAC/BBP RT2560 (rev 0x04), RF RT2525
>>> glxpcib0 at pci0 dev 15 function 0 "AMD CS5536 ISA" rev 0x03: rev 3,
32-bit 3579545Hz timer, watchdog, gpio
>>> gpio0 at glxpcib0: 32 pins
>>> pciide0 at pci0 dev 15 function 2 "AMD CS5536 IDE" rev 0x01: DMA, channel
0 wired to compatibility, channel 1 wired to compatibility
>>> wd0 at pciide0 channel 0 drive 0: <LEXAR ATA FLASH CARD>
>>> wd0: 1-sector PIO, LBA, 15263MB, 31260096 sectors
>>> wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 2
>>> pciide0: channel 1 ignored (disabled)
>>> ohci0 at pci0 dev 15 function 4 "AMD CS5536 USB" rev 0x02: irq 15, version
1.0, legacy support
>>> ehci0 at pci0 dev 15 function 5 "AMD CS5536 USB" rev 0x02: irq 15
>>> usb0 at ehci0: USB revision 2.0
>>> uhub0 at usb0 "AMD EHCI root hub" rev 2.00/1.00 addr 1
>>> isa0 at glxpcib0
>>> isadma0 at isa0
>>> com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
>>> com0: console
>>> pcppi0 at isa0 port 0x61
>>> spkr0 at pcppi0
>>> npx0 at isa0 port 0xf0/16: reported by CPUID; using exception 16
>>> usb1 at ohci0: USB revision 1.0
>>> uhub1 at usb1 "AMD OHCI root hub" rev 1.00/1.00 addr 1
>>> mtrr: K6-family MTRR support (2 registers)
>>> nvram: invalid checksum
>>> vscsi0 at root
>>> scsibus0 at vscsi0: 256 targets
>>> softraid0 at root
>>> scsibus1 at softraid0: 256 targets
>>> root on wd0a (5bea3261eefd6b7e.a) swap on wd0b dump on wd0b
>>> clock: unknown CMOS layout
>>> ral0: device timeout
>>> pid 20260 (postgres): user write of 118784@0x28052000 at 159088 failed:
14
>>> pid 1872 (cron): user write of 118784@0x2b1e3000 at 30224 failed: 14
