From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Thu, 22 Mar 2007 22:39:27 -0800 From: Andrew Morton Subject: Re: [QUICKLIST 1/5] Quicklists for page table pages V4 Message-Id: <20070322223927.bb4caf43.akpm@linux-foundation.org> In-Reply-To: <20070323062843.19502.19827.sendpatchset@schroedinger.engr.sgi.com> References: <20070323062843.19502.19827.sendpatchset@schroedinger.engr.sgi.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Christoph Lameter Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org List-ID: On Thu, 22 Mar 2007 23:28:41 -0700 (PDT) Christoph Lameter wrote: > 1. Proven code from the IA64 arch. > > The method used here has been fine tuned for years and > is NUMA aware. It is based on the knowledge that accesses > to page table pages are sparse in nature. Taking a page > off the freelists instead of allocating a zeroed pages > allows a reduction of number of cachelines touched > in addition to getting rid of the slab overhead. So > performance improves. By how much? -- 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