> You mention slub_debug=- makes the problem go away but can you narrow it 
> down to a specific debug option described in Documentation/vm/slub.txt? 
> In particular, does disabling slab poisoning or red zoning make the 
> problem go away also?

I tried with slub_debug= F,Z,P and U. Only with F the problem is not there.

Gruß,
	Jens