Re: Athlon problems

James Manning (jmm@computer.org)
Sat, 12 Feb 2000 12:17:39 -0500


[ Friday, February 11, 2000 ] Marco Colombo wrote:
> > Unable to handle kernel NULL pointer dereference at virtual address 000000a0
> ^^^^^^^^
> this seems to be a 0, with a "wrong" bit set to 1. I had the same
> (it was 000000c0). If it's a constan (one bit changed) in your oops,
> you should really check your RAM.

1) it's most likely a struct->field where struct's ptr location was NULL and
field is offset 0xa0 (160 bytes)
2) even one-bit-off, it's still a deref of an invalid ptr
3) "a" is 1010, 2 bits off from 0x0
4) "c" is 1100, also 2 bits off

Methinks it's a valid oops, hopefully accompanied by a valid ksymoops

James

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