On Tue, 25 Sep 2012, David Rientjes wrote: > Nack, this is already handled by CREATE_MASK in the mm/slab.c allocator; CREATE_MASK defines legal flags that can be specified. Other flags cause and error. This is about flags that are internal that should be ignored when specified. I think it makes sense to reserve some top flags for internal purposes. > the flag extensions beyond those defined in the generic slab.h header are > implementation defined. It may be true that SLAB uses a bit only > internally (and already protects it with a BUG_ON() in > __kmem_cache_create()) but that doesn't mean other implementations can't > use such a flag that would be a no-op on another allocator. Other implementations such as SLUB also use the bits in that high range. Simply ignoring the internal bits on cache creation if they are set is IMHO not a bit issue and simplifies Glaubers task. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>