[Devel] Re: [PATCH 3/5] Switch caches notification dynamically

[Christoph Lameter]

On Tue, 25 Sep 2007, Pavel Emelyanov wrote:

> +		for_each_node_state(n, N_NORMAL_MEMORY) {
> +			struct kmem_cache_node *node;
> +			struct page *pg;
> +			
> +			node = get_node(s, n);
> +			spin_lock_irq(&node->list_lock);
> +			list_for_each_entry(pg, &node->partial, lru)
> +				SetSlabDebug(pg);
> +			spin_unlock_irq(&node->list_lock);


Is it necessary to mark all the existing slabs with SLAB_DEBUG? Would it 
not be sufficient to just mark the new ones coming up? The above operation 
could be a bit expensive.