On Wed, 26 Sep 2012, Christoph Lameter 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. >
That should be ignored for the mm/slab.c allocator, yes. > I think it makes sense to reserve some top flags for internal purposes. > It depends on the implementation: if another slab allocator were to use additional bits that would be a no-op with mm/slab.c, then this patch would be too restrictive. There's also no requirement that any "internal flags" reserved by a slab allocator implementation must be shared in the same kmem_cache field as the flags passed to kmem_cache_create() -- it's actually better if they aren't since they seldom need to be accessed in the same cacheline. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
