From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx109.postini.com [74.125.245.109]) by kanga.kvack.org (Postfix) with SMTP id 7A10F6B0032 for ; Thu, 22 Aug 2013 13:51:59 -0400 (EDT) Date: Thu, 22 Aug 2013 17:51:58 +0000 From: Christoph Lameter Subject: Re: [PATCH 04/16] slab: remove nodeid in struct slab In-Reply-To: <1377161065-30552-5-git-send-email-iamjoonsoo.kim@lge.com> Message-ID: <00000140a7277e81-d259fd75-0dcb-4bef-9e32-d615800201a6-000000@email.amazonses.com> References: <1377161065-30552-1-git-send-email-iamjoonsoo.kim@lge.com> <1377161065-30552-5-git-send-email-iamjoonsoo.kim@lge.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org List-ID: To: Joonsoo Kim Cc: Pekka Enberg , Andrew Morton , Joonsoo Kim , David Rientjes , linux-mm@kvack.org, linux-kernel@vger.kernel.org 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? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org