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SubjectRe: 2.2.12 still "attempt to access beyond end of device"

On Mon, 13 Sep 1999, Stephen C. Tweedie wrote:

> Was this after an unclean reboot? It looks increasingly as if a lot of
> current PC systems have a problem with trashing random disk blocks if
> the system powerfails mid-write. That would explain bad block accesses
> on the root device, but other devices should have been fscked cleanly
> before they'd get this sort of error.

No, it was after a clean reboot[1]. I compiled 2.2.12, installed it,
rebooted -- and got the errors. They occurred again the following night,
upon an updatedb, and that was the end of it. I even ran a fsck on that
volume (remounted r/o previously), but it didn't show up anything unusual.

> Can you isolate the problem to a specific kernel version, or does this
> seem to be a generic problem?

I only saw it with 2.2.12. I had run 2.2.11+memleak patches previously,
and 2.2.9 before that, with no such errors occurring -- although I realize
it might be by pure chance.

Another thing of interest (maybe) is the version of gcc:
# gcc -v
Reading specs from
gcc version pgcc-2.91.57 19980901 (egcs-1.1 release)

All previous kernels, starting basically with the release date of pgcs
(09/98) had been compiled with the same compiler, though. That's quite a
few versions of 2.1 and 2.2 kernels..


[1] Actually, there is a small chance that the volume was not unmounted
cleanly. I did the reboot remotely, and with this system being a
(modified) Slackware system, there is no log of the boot-up non-kernel
operations. On the other hand, precisely because it's a Slackware system,
it's pretty thorough when killing off processes, and in addition I added
the "remount read-only if unmounting fails" thing myself. So the
likelyhood of an unclean unmount on a clean "shutdown -rf now" is really
small indeed.

Ionut Badulescu <>
System Administrator, Network Operation Center
Dynamic Network Technologies, Timisoara, Romania
Telefon: +40-56-204967 FAX: +40-56-220201 Connex GSM: #2212

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