Date: Thu, 09 Sep 1999 10:27:28 -0700 From: "Addr.com Web Hosting" <admin@addr.com> To: freebsd-stable@FreeBSD.ORG Subject: Fequent panics in FreeBSD 3.3-RC ... Message-ID: <4.2.0.58.19990909101426.009d3d40@mail3.addr.com>
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Hi,
I have recently upgraded a system to the latest stable, and have already
received three of these panics:
uname -a reads
FreeBSD addr3.addr.com 3.3-RC FreeBSD 3.3-RC #0: Tue Sep 7 21:57:07 GMT 1999
root@addr3.addr.com:/usr/src/sys/compile/ADDRKERN i386
the panic reads:
Fatal trap 12: page fault while in kernel mode
mp_lock = 01000002; cpuid = 1; lapic.id = 01000000
fault virtual address = 0xc4e7f08c
fault code = supervisor write, page not present
instruction pointer = 0x8:0xc025f47a
stack pointer = 0x10:0xd2ed2f0c
frame pointer = 0x10:0xd2ed2f1c
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 12498 (httpd)
interrupt mask = net tty bio cam <- SMP: XXX
trap number = 12
panic: page fault
mp_lock = 01000002; cpuid = 1; lapic.id = 01000000
boot() called on cpu#1
nm /kernel for that area shows:
c025f314 T pmap_page_exists
c025f30c T pmap_pageable
c025f3a4 T pmap_remove_pages
c025f4e0 t pmap_testbit
I have also received one panic at c025e2cc:
nm /kernel | grep c025e2
c025e290 t pmap_insert_entry
And also one complete freeze up. This is all in only 3 days, but I have
found no way to replicate the error. It doesn't seem entirely random since
it always occurs in "pmap" related functions. These panics have been
following me since 3.0-STABLE and into 3.2-RELEASE and now in 3.3-RC. They
seem like the result of some sort of attack because they increase in
frequency if we have a spam issue with a user or similar on that machine.
The server is a dual PentiumIII-450 with 512 MB of ram and DPT raid
controller. Max users is set at 256 (I don't know about this version, but
on previous versions setting it higher caused constant panics). It usually
runs at load average of about 2, serving apache/sendmail/telnet/ftpd/ipop3d
as well as a little bit of NFS data for local updates and a completely idle
NFS client.
Same panics occurred on server with dual P||-400 with 1GB of ram and DPT
controller, so it is not an issue caused by faulty hardware.
Oh, I am not using "device apm" since this seems to be a cause for a lot of
discussion lately.
If you need any more info I would be glad to provide it. Any help regarding
this problem would be greatly appreciated.
Best Regards,
Anthony Bourov
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