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SubjectRe: 2.3.44 bug
On Sun, 13 Feb 2000, Tigran Aivazian wrote:

> I was using 2.3.43 (and all other recent 2.3.x) without observing
> this specific problem so it is something new to 2.3.44. I have not
> narrowed it down yet but the symptom is that I can't start any
> large programs (e.g. X) and can't compile almost anything, gcc
> randomly dies with SIGSEGV.

This problem is not new. 2.3.42 and 2.3.43 have it too.

> The machine is a plain dual PIII (Katmai) 550 on a GA BXD
> motherboard, nothing too exotic - old good slot 1 design.

It's a typical SMP problem, supposedly caused by bugs in
the TLB flush code.

> I will let you know if I find more - I intend to narrow it down
> and then look closer at the changes.

I've narrowed it down a little bit.

$ for i in `seq 50` ; do md5sum <file_bigger_than_ram> ; done

Over NFS this works, gives the same (correct) md5 sum every time.
Now I copy this file to my ext2 /tmp partition and try again.
About one in five md5sums is incorrect ... but the file _write_
has always been correct.

2.3.37 is the last kernel I tried where the error didn't show
up, so I suspect it changed somewhere between 2.3.37 and 2.3.42.


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