Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poisonoverwritten
From: Ingo Molnar
Date: Fri Jul 18 2008 - 05:05:44 EST
* Vegard Nossum <vegard.nossum@xxxxxxxxx> wrote:
> But.. it could also be some random corruption coming from elsewhere.
> Maybe even bad RAM (it's just a single bit anyway). But that's less
ok, i looked at the logs once more and while i thought that it occured
twice it only occured once:
Jul 17 20:22:14 europe kernel: BUG skbuff_head_cache: Poison overwritten
... this would explain why my attempts to bisect and reproduce it
failed. I got too excited about it being seemingly reproducible and
possibly bisectable (memory corruption bugs rarely are). My overnight
reboot-the-same-kernel tests didnt show anything either.
It's a known-reliable system with thousands of bootups:
Jul 17 20:20:54 europe kernel: Linux version 2.6.26-tip (mingo@europe)
(gcc version 4.2.2) #3094 SMP Thu Jul 17 20:19:27 CEST 2008
... but a hw fluke is never out of question. (It wasnt a particularly
hot day but the evening was unusually humid, maybe that made the
So lets close this for now, it's not a reproducible regression that we
can act upon. I'll update this thread if anything new happens.
Netconsole is reliable on this system in any case.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/