Re: kernel 2.6.37 : oops in cleanup_once

Le lundi 14 mars 2011 à 11:44 +0100, Yann Dupont a écrit :

Le 02/02/2011 16:08, Eric Dumazet a écrit :

quoted

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 ?

...

quoted

quoted

-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.