From mboxrd@z Thu Jan 1 00:00:00 1970 Subject: Re: [RFC][PATCH 5/6] slab: kmem_cache_objs_to_pages() From: Peter Zijlstra In-Reply-To: References: <20061130101451.495412000@chello.nl> > <20061130101922.175620000@chello.nl> > Content-Type: text/plain Date: Thu, 30 Nov 2006 19:55:17 +0100 Message-Id: <1164912917.6588.155.camel@twins> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Christoph Lameter Cc: netdev@vger.kernel.org, linux-mm@kvack.org, David Miller List-ID: On Thu, 2006-11-30 at 10:55 -0800, Christoph Lameter wrote: > On Thu, 30 Nov 2006, Peter Zijlstra wrote: > > > +unsigned int kmem_cache_objs_to_pages(struct kmem_cache *cachep, int nr) > > +{ > > + return ((nr + cachep->num - 1) / cachep->num) << cachep->gfporder; > > cachep->num refers to the number of objects in a slab of gfporder. Ah, my bad, thanks! > thus > > return (nr + cachep->num - 1) / cachep->num; > > But then this is very optimistic estimate that assumes a single node and > no free objects in between. Right, perhaps my bad in wording the intent; the needed information is how many more pages would I need to grow the slab with in order to store so many new object. -- 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