Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761374AbYBBIMe (ORCPT ); Sat, 2 Feb 2008 03:12:34 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756620AbYBBIMZ (ORCPT ); Sat, 2 Feb 2008 03:12:25 -0500 Received: from fgwmail5.fujitsu.co.jp ([192.51.44.35]:38851 "EHLO fgwmail5.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756570AbYBBIMY (ORCPT ); Sat, 2 Feb 2008 03:12:24 -0500 Date: Sat, 02 Feb 2008 17:12:30 +0900 From: KOSAKI Motohiro To: linux-mm@kvack.org, linux-kernel@vger.kernel.org, "Andrew Morton" , Christoph Lameter , Andi Kleen Subject: [2.6.24-rc8-mm1][regression?] numactl --interleave=all doesn't works on memoryless node. Cc: kosaki.motohiro@jp.fujitsu.com Message-Id: <20080202165054.F491.KOSAKI.MOTOHIRO@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Mailer: Becky! ver. 2.42 [ja] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2019 Lines: 94 Hi I tested numactl on 2.6.24-rc8-mm1. and I found strange behavior. test method and result. $ numactl --interleave=all ls set_mempolicy: Invalid argument setting interleave mask: Invalid argument numactl command download from ftp://ftp.suse.com/pub/people/ak/numa/ (I choice numactl-1.0.2) Of course, older kernel(RHEL5.1) works good. more detail: 1. my machine node and memory. $ numactl --hardware available: 16 nodes (0-15) node 0 size: 0 MB node 0 free: 0 MB node 1 size: 0 MB node 1 free: 0 MB node 2 size: 3872 MB node 2 free: 1487 MB node 3 size: 4032 MB node 3 free: 3671 MB node 4 size: 0 MB node 4 free: 0 MB node 5 size: 0 MB node 5 free: 0 MB node 6 size: 0 MB node 6 free: 0 MB node 7 size: 0 MB node 7 free: 0 MB node 8 size: 0 MB node 8 free: 0 MB node 9 size: 0 MB node 9 free: 0 MB node 10 size: 0 MB node 10 free: 0 MB node 11 size: 0 MB node 11 free: 0 MB node 12 size: 0 MB node 12 free: 0 MB node 13 size: 0 MB node 13 free: 0 MB node 14 size: 0 MB node 14 free: 0 MB node 15 size: 0 MB node 15 free: 0 MB 2. numactl behavior of --interleave=all 2.1 scan "/sys/devices/system/node" dir 2.2 calculate max node number 2.3 all bit turn on of existing node. (i.e. 0xFF generated on my environment.) 2.4 call set_mempolicy() 3. 2.6.24-rc8-mm1 set_mempolicy(2) behavior 3.1 check nodesubset(nodemask argument, node_states[N_HIGH_MEMORY]) in mpol_check_policy() -> check failed when memmoryless node exist. (i.e. node_states[N_HIGH_MEMORY] of my machine is 0xc) 4. RHEL5.1 set_mempolicy(2) behavior 4.1 check nodesubset(nodemask argument, node_online_map) in mpol_check_policy(). -> check success. I don't know wrong either kernel or libnuma. Please any comments! - kosaki -- 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/