Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S267708AbUJLT5m (ORCPT ); Tue, 12 Oct 2004 15:57:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267709AbUJLT5m (ORCPT ); Tue, 12 Oct 2004 15:57:42 -0400 Received: from zero.aec.at ([193.170.194.10]:12560 "EHLO zero.aec.at") by vger.kernel.org with ESMTP id S267708AbUJLT5a (ORCPT ); Tue, 12 Oct 2004 15:57:30 -0400 To: Rik van Riel cc: linux-kernel@vger.kernel.org, clameter@sgi.com Subject: Re: NUMA: Patch for node based swapping References: <2OwBD-HV-31@gated-at.bofh.it> <2OwUX-Ua-23@gated-at.bofh.it> From: Andi Kleen Date: Tue, 12 Oct 2004 21:57:09 +0200 In-Reply-To: <2OwUX-Ua-23@gated-at.bofh.it> (Rik van Riel's message of "Tue, 12 Oct 2004 17:40:11 +0200") Message-ID: User-Agent: Gnus/5.110003 (No Gnus v0.3) Emacs/21.2 (gnu/linux) 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: 793 Lines: 21 Rik van Riel writes: > On Tue, 12 Oct 2004, Christoph Lameter wrote: > >> The minimum may be controlled through /proc/sys/vm/node_swap. >> By default node_swap is set to 100 which means that kswapd will be run on >> a zone if less than 10% are available after allocation. > > That sounds like an extraordinarily bad idea for eg. AMD64 > systems, which have a very low numa factor. As a optional sysctl it makes sense even on AMD64. On some benchmarks you see the differences between local and remote memory very clearly. -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/