Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755154AbYCKHNq (ORCPT ); Tue, 11 Mar 2008 03:13:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751481AbYCKHNg (ORCPT ); Tue, 11 Mar 2008 03:13:36 -0400 Received: from cantor2.suse.de ([195.135.220.15]:58643 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751265AbYCKHNf (ORCPT ); Tue, 11 Mar 2008 03:13:35 -0400 Date: Tue, 11 Mar 2008 08:13:31 +0100 From: Nick Piggin To: Christoph Lameter Cc: netdev@vger.kernel.org, Linux Kernel Mailing List , yanmin_zhang@linux.intel.com, David Miller , Eric Dumazet Subject: Re: [rfc][patch 2/3] slab: introduce SMP alignment Message-ID: <20080311071330.GA20271@wotan.suse.de> References: <20080303200355.GB8974@wotan.suse.de> <20080303201211.GE8974@wotan.suse.de> <20080303202411.GH8974@wotan.suse.de> <20080307043700.GI21185@wotan.suse.de> <20080307051944.GJ21185@wotan.suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 910 Lines: 21 On Thu, Mar 06, 2008 at 09:26:24PM -0800, Christoph Lameter wrote: > Internode alignment is 4k. If you need an object aligned like that then it > may be better to go to the page allocator. I never got a reply about this. Again: how can the modern slab allocator avoid the need for internode alignment in order to prevent cacheline pingpong on vsmp? Because I'm going to resubmit the SMP_ALIGN patch. Also, the last I heard about the HWCACHE_ALIGN from you is that it didn't make sense... I see it's merged now, which I appreciate, but I think it is really important that we're on the same page here, so let me know if it still doesn't make sense. Thanks, Nick -- 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/