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Date: Mon, 19 Apr 1999 15:33:00 +1000
Subject: 2.2.8-STABLE panic (page fault)
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Dear Ladies and Gentlemen,

I am writing to ask your help with a panic in a production Web server.

The details are

supervisor write, page not prsent
fault 12 page fault while in kernel

instruction pointer ?         0x08 0xf0 13 b2 4b
stack pointer            0x10 0xef bf fe d8
frame pointer            0x10 0xef bf ff e0
code segment             base 0x0 limit 0xfffff
                    type 0x1b DPL 0 pre 1 def 32

processor edlags         interuptable resume IOPL = 0
current process               httpd
page fault

Other details.

PC

ASUS P54 mainboard, P5 166 Mhz, 128 MB RAM, Adaptec 2940UW with 2 SCSI drives,
PCI ethernet (Intel EtherExpress Pro  10/100B).

History

The PC runs Apache 1.2.5 and squid 1.1.20. Squid hovers on about 60 MB of
resident memory use.

 It has been very stable while running 2.2.7-RELEASE. This is now the second
time I have had a 2.2.8-STABLE machine fail (can't say what happened in an other
machine with identical processing load and very similar hardware) in this role.

The last message in the log before the reboot messages was "out of mbuf
clusters. Increase maxusers!

This machine has follwed the advice in the squid FAQ about tuning (it has max
process size, max fd open etc upped in login.conf).

MAXUSERS is 256.

Here are some of the kernel parameter values

kern.maxfilesperproc: 2088
kern.maxprocperuid: 1043
kern.dumpdev: { major = 255, minor = -65281 }
kern.somaxconn: 128
kern.maxsockbuf: 262144
kern.ps_strings: -272637968
kern.usrstack: -272637952
kern.shutdown_timeout: 120
kern.acct_suspend: 2
kern.acct_resume: 4
kern.acct_chkfreq: 15
kern.quantum: 10
kern.sockbuf_waste_factor: 8
kern.consmute: 0

Thank you,

Yours sincerely







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