Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964773AbWHHJ6l (ORCPT ); Tue, 8 Aug 2006 05:58:41 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S964774AbWHHJ6l (ORCPT ); Tue, 8 Aug 2006 05:58:41 -0400 Received: from cantor2.suse.de ([195.135.220.15]:6314 "EHLO mx2.suse.de") by vger.kernel.org with ESMTP id S964773AbWHHJ6k (ORCPT ); Tue, 8 Aug 2006 05:58:40 -0400 To: Jes Sorensen Cc: linux-kernel@vger.kernel.org, "Shai Fultheim (Shai@scalex86.org)" , pravin b shelar Subject: Re: [RFC] NUMA futex hashing References: <20060808070708.GA3931@localhost.localdomain> From: Andi Kleen Date: 08 Aug 2006 11:58:39 +0200 In-Reply-To: Message-ID: User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 648 Lines: 12 Jes Sorensen writes: > > Using that argument, all you need to do is to add the alignment > ____cacheline_aligned_in_smp to the definition of > struct futex_hash_bucket and the problem is solved, given that the > internode cacheline in a NUMA system is defined to be the same as the > SMP cacheline size. Yes but it would waste quite a lot of memory and cache. Wasted cache = slow. -Andi - 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/