Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753870Ab0DURTS (ORCPT ); Wed, 21 Apr 2010 13:19:18 -0400 Received: from mx1.redhat.com ([209.132.183.28]:6776 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753074Ab0DURTR (ORCPT ); Wed, 21 Apr 2010 13:19:17 -0400 Message-ID: <4BCF336B.1050706@redhat.com> Date: Wed, 21 Apr 2010 13:18:35 -0400 From: Rik van Riel User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.7) Gecko/20100120 Fedora/3.0.1-1.fc12 Lightning/1.0b2pre Thunderbird/3.0.1 MIME-Version: 1.0 To: Hedi Berriche CC: Alan Cox , Mike Travis , Ingo Molnar , Greg Kroah-Hartman , Linus Torvalds , Jack Steiner , Andrew Morton , Robin Holt , LKML Subject: Re: [Patch 1/1] init: Provide a kernel start parameter to increase pid_max v2 References: <4BCE579C.5070100@sgi.com> <4BCE5A73.3000904@sgi.com> <20100421102350.4c222e6b@lxorguk.ukuu.org.uk> <20100421165934.GN16427@zorg.emea.sgi.com> In-Reply-To: <20100421165934.GN16427@zorg.emea.sgi.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 795 Lines: 19 On 04/21/2010 12:59 PM, Hedi Berriche wrote: > On Wed, Apr 21, 2010 at 10:20 Alan Cox wrote: > |> of 32k will not be enough. A system with 1664 CPU's, there are 25163 processes > |> started before the login prompt. It's estimated that with 2048 CPU's we will pass > | > | Is that perhaps the bug not the 32K limit? > > Doubt it: I just checked on an *idle* 1664 CPUs system and I can see 26844 > tasks, all but few being kernel threads. That is 15 kernel threads per CPU. Reducing the number of kernel threads sounds like a useful thing to do. -- 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/