From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932657AbXGLM15 (ORCPT ); Thu, 12 Jul 2007 08:27:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757486AbXGLM1v (ORCPT ); Thu, 12 Jul 2007 08:27:51 -0400 Received: from mail1.webmaster.com ([216.152.64.169]:4418 "EHLO mail1.webmaster.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757399AbXGLM1u (ORCPT ); Thu, 12 Jul 2007 08:27:50 -0400 From: "David Schwartz" To: "LKML" Subject: RE: NPTL Date: Thu, 12 Jul 2007 05:27:31 -0700 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.6604 (9.0.2911.0) Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3138 In-Reply-To: X-Authenticated-Sender: joelkatz@webmaster.com X-Spam-Processed: mail1.webmaster.com, Thu, 12 Jul 2007 05:28:03 -0700 (not processed: message from trusted or authenticated source) X-MDRemoteIP: 206.171.168.138 X-Return-Path: davids@webmaster.com X-MDaemon-Deliver-To: linux-kernel@vger.kernel.org Reply-To: davids@webmaster.com X-MDAV-Processed: mail1.webmaster.com, Thu, 12 Jul 2007 05:28:04 -0700 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > Hi! > I have a question about NPTL. > Are NPTL are still based on `clone` system call? Yes. > Are NPTL threads are > "processes" internally? No. By definition, all the threads belong to a single process. NPTL threads are based on KSEs (kernel scheduling entities). A non-threaded process is also a KSE. A threaded process is more than one KSEs. All KSE are, obviously, scheduled by the kernel. > Thanks! You're welcome. DS