Re: kernel 2.6.37 : oops in cleanup_once

Eric Dumazet
2011-03-14T13:14:29Z

Le lundi 14 mars 2011 à 11:44 +0100, Yann Dupont a écrit :
> Le 02/02/2011 16:08, Eric Dumazet a écrit :
>
>
> > I suspect a mem corruption from another layer (not inetpeer)
> >
> > Unfortunately many kmem caches share the "64 bytes" cache.
> >
> > Could you please add "slub_nomerge" on your boot command ?
> >
> ...
>
> >
> >> -Is there a very severe impact on performance ?
> >>
> > not at all
> >
> Maybe there is an impact after all : since then, we don't have problems
> anymore !
>
> linkwood:~# uptime
> 11:42:03 up 39 days, 17:08, 3 users, load average: 0.01, 0.03, 0.05
>
> So... could slub_nomerge hide or simply avoid the problem ?
> Or are we just lucky this time ?
>
>

I would say you are lucky ;)

Not all memory corruptions are noticed. Sometimes it touch unused parts
of memory, or some parts with no critical content.