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Subjectstuck on TLB IPI wait (CPU#0) ??? [2.2.19]
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I ran scsi_info, which appeared to run just fine. Then the machine moved into 
molasses mode.

The last log entries I before the reboot was this:

Sep 26 04:59:23 habitrail kernel: IP_MASQ:reverse ICMP: failed checksum from
193.158.133.165!
Sep 26 05:00:00 habitrail kernel: IP_MASQ:reverse ICMP: failed checksum from
195.252.130.145!
Sep 26 05:28:55 habitrail kernel: IP_MASQ:reverse ICMP: failed checksum from
193.158.133.165!
Sep 26 05:29:13 habitrail kernel: IP_MASQ:reverse ICMP: failed checksum from
193.158.133.165!
Sep 26 05:43:51 habitrail sudo: hacksaw : TTY=pts/0 ; PWD=/lib/modules/2.2.19
; USER=root ; COMMAND
=/sbin/scsi_info /dev/sda
Sep 26 05:44:01 habitrail kernel: stuck on TLB IPI wait (CPU#0)
Sep 26 05:45:00 habitrail last message repeated 4 times


A bit of info about the machine:
Sep 26 06:01:57 habitrail kernel: Linux version 2.2.19
(hacksaw@habitrail.home.fools-errant.com) (gc
c version egcs-2.91.66 19990314/Linux (egcs-1.1.2 release)) #3 SMP Sat Jun 2
22:24:40 EDT 2001
Sep 26 06:01:57 habitrail kernel: BIOS-provided physical RAM map:
Sep 26 06:01:57 habitrail kernel: BIOS-e820: 0009f000 @ 00000000 (usable)
Sep 26 06:01:57 habitrail kernel: BIOS-e820: 1ff00000 @ 00100000 (usable)
Sep 26 06:01:57 habitrail kernel: Intel MultiProcessor Specification v1.1
Sep 26 06:01:57 habitrail kernel: Virtual Wire compatibility mode.
Sep 26 06:01:57 habitrail kernel: OEM ID: OEM00000 Product ID: PROD00000000
APIC at: 0xFEE00000
Sep 26 06:01:57 habitrail kernel: Processor #0 Pentium(tm) Pro APIC version 17
Sep 26 06:01:57 habitrail kernel: Processor #1 Pentium(tm) Pro APIC version 17
Sep 26 06:01:57 habitrail kernel: I/O APIC #2 Version 17 at 0xFEC00000.
Sep 26 06:01:57 habitrail kernel: Processors: 2
Sep 26 06:01:57 habitrail kernel: mapped APIC to ffffe000 (fee00000)
Sep 26 06:01:57 habitrail kernel: mapped IOAPIC to ffffd000 (fec00000)
Sep 26 06:01:57 habitrail kernel: Detected 451029 kHz processor.
Sep 26 06:01:57 habitrail kernel: Console: colour VGA+ 132x60
Sep 26 06:01:57 habitrail kernel: Calibrating delay loop... 897.84 BogoMIPS
Sep 26 06:01:57 habitrail kernel: Memory: 516528k/524288k available (1640k
kernel code, 420k reserve
d, 5616k data, 84k init)

It's a Soyo motherboard. It has a SCSI drive from which it boots, CD-ROM and
tape drive. It also has an IDE drive, which is used for backup, and extra
storage.

At the time of the crash, I was reading mail.

I've never had this happen before. My uptimes with this kernel have typically
run into weeks or months, and have always been broken because I was
reconfiguring the kernel.

The IP_MASQ icmp checksum things are often in the logs; I could never find
anyone to explain what they were. As far as I know, they are not causing me
problems.

Should I care about the TLB IPI thing? Should I not run scsi_info? (I'd run a
test, but it's a production machine, and I didn't want it down at all. I might
be able to test later if this is an unknown problem.


--
Digression is nine tenths of the lore
http://www.hacksaw.org -- http://www.privatecircus.com -- KB1FVD


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