From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751319AbWJaCiv (ORCPT ); Mon, 30 Oct 2006 21:38:51 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751476AbWJaCiu (ORCPT ); Mon, 30 Oct 2006 21:38:50 -0500 Received: from smtp-out.google.com ([216.239.45.12]:9937 "EHLO smtp-out.google.com") by vger.kernel.org with ESMTP id S1751319AbWJaCiu (ORCPT ); Mon, 30 Oct 2006 21:38:50 -0500 DomainKey-Signature: a=rsa-sha1; s=beta; d=google.com; c=nofws; q=dns; h=received:message-id:date:from:to:subject:cc:mime-version: content-type:content-transfer-encoding:content-disposition; b=E8DYK4BdtI6HlgPHhUVgzAfQk1fa8w4eV0h1gRaG4WFPPRYwZBNEZaWQgKrnokkaS Myhsgf3TXsFNEkAegDPLQ== Message-ID: <6599ad830610301838i65a00d85g82647435ea4581a4@mail.gmail.com> Date: Mon, 30 Oct 2006 18:38:41 -0800 From: "Paul Menage" To: "Andrew Morton" , "Paul Jackson" Subject: [PATCH] Allow a larger buffer for writes to cpuset files Cc: linux-kernel MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org When using fake NUMA setup, the number of memory nodes can greatly exceed the number of CPUs. So the current limit in cpuset_common_file_write() is insufficient. PAGE_SIZE is still a bit of an arbitrary limit, but gives more breathing room. Signed-off-by: Paul Menage --- 2.6.19-rc2.orig/kernel/cpuset.c +++ 2.6.19-rc2/kernel/cpuset.c @@ -1292,7 +1292,7 @@ static ssize_t cpuset_common_file_write( int retval = 0; /* Crude upper limit on largest legitimate cpulist user might write. */ - if (nbytes > 100 + 6 * NR_CPUS) + if (nbytes >= PAGE_SIZE) return -E2BIG; /* +1 for nul-terminator */