Re: URGENT : System hands on "Freeing unused kernel memory: "

From: Stuart MacDonald (stuartm@connecttech.com)
Date: Tue Mar 27 2001 - 09:40:50 EST


From: "Thomas Foerster" <puckwork@madz.net>
> But suddenly the box was offline. One technical assistant from our ISP
tried to reboot
> our server (he couldn't tell me if there had been any messages on the
screen), but the
> system always hangs on
>
> Freeing unused kernel memory: xxk freed

I have a customer with the same symptom. They
have stock Mandrake 7.2 (kernel 2.2.17-21mdk)
and have installed serial-5.05 into it. The kernel
boots to the Freeing message and hangs. I
noticed ctl-alt-del still works, so I configured in
magic sysrq (Documentation/sysrq.txt). sysrq-p
allowed me to get the eip, which checking against
the System.map I find is mod_timer(). A quick
printk showed me that the kernel isn't hung,
it's in an infinite loop, with mod_timer() being
one of the calls in the loop.

YMMV, but hopefully this method can help
you find your problem.

..Stu

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This archive was generated by hypermail 2b29 : Sat Mar 31 2001 - 21:00:16 EST