On Thu, 8 Jun 2006, Michael Erdely wrote:
> Hi,
>
> I've got a Dell Dimension XPS B866r desktop running as my web/mail server
> (recently upgraded to 3.9).
>
> Occasionally, after a seemingly random amount of time, the machine will do one
> of two things: it will either lockup/freeze where there are no messages on the
> console, but you cannot type, ping or access the box in any way (but the reset
> button) OR, since I have ddb.panic=0, it will reboot with the following
> message from my serial console:
> panic: semop - can't undo undos
> Starting stack trace...panic(fffffff4,3,e870df10,2,fffffff4) at
> panic+0x71panic(d051c1f6,e870dec8,12,d6a4f2d0,3) at panic+0x71
> sys_semop(d658b2f0,e870df68,e870df58,0,1998c) at sys_semop+0x492syscall() at
> syscall+0x2ea
> --- syscall (number 290) ---0x444e4e9:
> End of stack trace.
> syncing disks... 19 19 donerebooting...
>
> Since the box rebooted automatically, I don't have ps output, but the box is
> running: stock GENERIC kernel, mysql-server-5.0.22, stock apache (chrooted) w/
> ssl, courier-imap/pop3 w/ssl, imap-proxy,
> php5-core,curl,gd,imap,mbstring,mcrypt,mysql-5.1.4-hardened (compiled from CVS
> ports of -current), wordpress-2.0.3, gallery-2.1.1, squirrelmail 1.4.6 and
> 1.5.1, spamd (openbsd), spamassassin (spamc+spamd+procmail), clamav
> (clamav-milter + clamd), sendmail (with sasl compiled in), sasl with
> mysql+crypt patch applied, pure-ftpd (requiring ssl... not really used).
>
> When the box comes back up, none of the log files have error messages.
>
> Let me know if I can provide any more info.
> Does anyone have any thoughts? I'm thinking that I'm running too much on my
> P3-866 w/ 512 MB RAM and should set up another box to offload either mail,
> apache or mysql.
your system is running out of semaphore undo data structures. Try
increasing at least kern.seminfo.semmnu. Other semaphore related
sysctl's might need an increase as well.
-Otto
>
> Below is a dmesg.
>
> Thanks.
>
> OpenBSD 3.9 (GENERIC) #617: Thu Mar 2 02:26:48 MST 2006
> [EMAIL PROTECTED]:/usr/src/sys/arch/i386/compile/GENERIC
> cpu0: Intel Pentium III ("GenuineIntel" 686-class) 865 MHz
> cpu0:
> FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE
> real mem = 536190976 (523624K)
> avail mem = 482246656 (470944K)
> using 4278 buffers containing 26910720 bytes (26280K) of memory
> mainbus0 (root)
> bios0 at mainbus0: AT/286+(00) BIOS, date 03/29/01, BIOS32 rev. 0 @ 0xfda74
> apm0 at bios0: Power Management spec V1.2
> apm0: AC on, battery charge unknown
> apm0: flags 30102 dobusy 0 doidle 1
> pcibios0 at bios0: rev 2.1 @ 0xf0000/0x10000
> pcibios0: PCI IRQ Routing Table rev 1.0 @ 0xf3250/208 (11 entries)
> pcibios0: PCI Interrupt Router at 000:31:0 ("Intel 82371FB ISA" rev 0x00)
> pcibios0: PCI bus #2 is the last bus
> bios0: ROM list: 0xc0000/0x8000 0xc8000/0x800
> cpu0 at mainbus0
> pci0 at mainbus0 bus 0: configuration mode 1 (no bios)
> pchb0 at pci0 dev 0 function 0 "Intel 82820 MCH" rev 0x03: rng active, 8Kb/sec
> ppb0 at pci0 dev 1 function 0 "Intel 82820 AGP" rev 0x03
> pci1 at ppb0 bus 1
> ppb1 at pci0 dev 30 function 0 "Intel 82801AA Hub-to-PCI" rev 0x02
> pci2 at ppb1 bus 2
> vga1 at pci2 dev 8 function 0 "S3 Trio32/64" rev 0x53
> wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
> wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
> xl0 at pci2 dev 11 function 0 "3Com 3c905C 100Base-TX" rev 0x74: irq 10,
> address 00:50:da:b6:52:f9
> bmtphy0 at xl0 phy 24: Broadcom 3C905C internal PHY, rev. 6
> ichpcib0 at pci0 dev 31 function 0 "Intel 82801AA LPC" rev 0x02
> pciide0 at pci0 dev 31 function 1 "Intel 82801AA IDE" rev 0x02: DMA, channel 0
> wired to compatibility, channel 1 wired to compatibility
> wd0 at pciide0 channel 0 drive 0: <ST330630A>
> wd0: 16-sector PIO, LBA, 29188MB, 59777640 sectors
> wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 4
> wd1 at pciide0 channel 1 drive 0: <ST330013A>
> wd1: 16-sector PIO, LBA, 28629MB, 58633344 sectors
> atapiscsi0 at pciide0 channel 1 drive 1
> scsibus0 at atapiscsi0: 2 targets
> cd0 at scsibus0 targ 0 lun 0: <HITACHI, DVD-ROM GD-5000, 0212> SCSI0 5/cdrom
> removable
> wd1(pciide0:1:0): using PIO mode 4, Ultra-DMA mode 4
> cd0(pciide0:1:1): using PIO mode 4, DMA mode 2
> uhci0 at pci0 dev 31 function 2 "Intel 82801AA USB" rev 0x02: irq 10
> usb0 at uhci0: USB revision 1.0
> uhub0 at usb0
> uhub0: Intel UHCI root hub, rev 1.00/1.00, addr 1
> uhub0: 2 ports with 2 removable, self powered
> ichiic0 at pci0 dev 31 function 3 "Intel 82801AA SMBus" rev 0x02: irq 9
> iic0 at ichiic0
> "unknown" at iic0 addr 0x18 not configured
> isa0 at ichpcib0
> isadma0 at isa0
> 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
> pms0 at pckbc0 (aux slot)
> pckbc0: using irq 12 for aux slot
> wsmouse0 at pms0 mux 0
> pcppi0 at isa0 port 0x61
> midi0 at pcppi0: <PC speaker>
> spkr0 at pcppi0
> lpt0 at isa0 port 0x378/4 irq 7
> npx0 at isa0 port 0xf0/16: using exception 16
> pccom0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
> pccom0: console
> fdc0 at isa0 port 0x3f0/6 irq 6 drq 2
> fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec
> biomask ef6d netmask ef6d ttymask ffef
> pctr: 686-class user-level performance counters enabled
> mtrr: Pentium Pro MTRR support
> dkcsum: wd0 matches BIOS drive 0x80
> dkcsum: wd1 matches BIOS drive 0x81
> root on wd0a
> rootdev=0x0 rrootdev=0x300 rawdev=0x302
