Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754506AbZA1R6P (ORCPT ); Wed, 28 Jan 2009 12:58:15 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751890AbZA1R5x (ORCPT ); Wed, 28 Jan 2009 12:57:53 -0500 Received: from smtp3.ultrahosting.com ([74.213.175.254]:37080 "EHLO smtp.ultrahosting.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752370AbZA1R5w (ORCPT ); Wed, 28 Jan 2009 12:57:52 -0500 Date: Wed, 28 Jan 2009 11:45:28 -0500 (EST) From: Christoph Lameter X-X-Sender: cl@qirst.com To: David Miller cc: tj@kernel.org, rusty@rustcorp.com.au, mingo@elte.hu, herbert@gondor.apana.org.au, akpm@linux-foundation.org, hpa@zytor.com, brgerst@gmail.com, ebiederm@xmission.com, travis@sgi.com, linux-kernel@vger.kernel.org, steiner@sgi.com, hugh@veritas.com, netdev@vger.kernel.org, mathieu.desnoyers@polymtl.ca Subject: Re: [PATCH] percpu: add optimized generic percpu accessors In-Reply-To: <20090127.134747.153565246.davem@davemloft.net> Message-ID: References: <200901271213.18605.rusty@rustcorp.com.au> <497E705B.5000302@kernel.org> <20090127.134747.153565246.davem@davemloft.net> User-Agent: Alpine 1.10 (DEB 962 2008-03-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 580 Lines: 15 On Tue, 27 Jan 2009, David Miller wrote: > > Why wont it scale? this is a separate TLB entry for each processor. > > The IA64 per-cpu TLB entry only covers 64k which makes use of it for > dynamic per-cpu stuff out of the question. That's why it "doesn't > scale" IA64 supports varying page sizes. You can use a 128k TLB entry etc. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/