| Date | Thu, 22 Aug 2013 17:51:58 +0000 | From | Christoph Lameter <> | Subject | Re: [PATCH 04/16] slab: remove nodeid in struct slab |
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On Thu, 22 Aug 2013, Joonsoo Kim wrote:
> @@ -1099,8 +1098,7 @@ static void drain_alien_cache(struct kmem_cache *cachep, > > static inline int cache_free_alien(struct kmem_cache *cachep, void *objp) > { > - struct slab *slabp = virt_to_slab(objp); > - int nodeid = slabp->nodeid; > + int nodeid = page_to_nid(virt_to_page(objp)); > struct kmem_cache_node *n; > struct array_cache *alien = NULL; > int node;
virt_to_page is a relatively expensive operation. How does this affect performance?
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