From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Pekka Enberg" Subject: Re: [PATCH 08/29] mm: kmem_cache_objs_to_pages() Date: Thu, 22 Feb 2007 11:45:53 +0200 Message-ID: <84144f020702220145h4f670ec6g428dc046ee9dcc71@mail.gmail.com> References: <20070221144304.512721000@taijtu.programming.kicks-ass.net> <20070221144842.299190000@taijtu.programming.kicks-ass.net> <84144f020702210747t50d7d92ei1a2f5da8bf117d40@mail.gmail.com> <1172136508.6374.41.camel@twins> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, "Trond Myklebust" , "Thomas Graf" , "David Miller" To: "Peter Zijlstra" Return-path: Received: from ug-out-1314.google.com ([66.249.92.172]:53700 "EHLO ug-out-1314.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751532AbXBVJp4 (ORCPT ); Thu, 22 Feb 2007 04:45:56 -0500 Received: by ug-out-1314.google.com with SMTP id 44so65617uga for ; Thu, 22 Feb 2007 01:45:53 -0800 (PST) In-Reply-To: <1172136508.6374.41.camel@twins> Content-Disposition: inline Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Hi Peter, On Wed, 2007-02-21 at 17:47 +0200, Pekka Enberg wrote: > > So how does this work? You ask the slab allocator how many pages you > > need for a given number of objects and then those pages are available > > to it via the page allocator? Can other users also dip into those > > reserves? On 2/22/07, Peter Zijlstra wrote: > Everybody (ab)using PF_MEMALLOC or the new __GFP_EMERGENCY. So you are only interested in rough estimation of how much many pages you need for a given amount of objects? Why not use ksize() for that then? Pekka