Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764587AbXHLPGs (ORCPT ); Sun, 12 Aug 2007 11:06:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S936096AbXHLPGG (ORCPT ); Sun, 12 Aug 2007 11:06:06 -0400 Received: from outpipe-village-512-1.bc.nu ([81.2.110.250]:50939 "EHLO the-village.bc.nu" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S936084AbXHLPGD (ORCPT ); Sun, 12 Aug 2007 11:06:03 -0400 Date: Sun, 12 Aug 2007 16:13:37 +0100 From: Alan Cox To: Fredrik Noring Cc: linux-kernel@vger.kernel.org Subject: Re: Improving read/write/close system call reliability when used with pthreads Message-ID: <20070812161337.3828381c@the-village.bc.nu> In-Reply-To: <70E19A0A-2728-4ADA-B984-A36182C1F575@nocrew.org> References: <70E19A0A-2728-4ADA-B984-A36182C1F575@nocrew.org> X-Mailer: Claws Mail 2.10.0 (GTK+ 2.10.14; i386-redhat-linux-gnu) Organization: Red Hat UK Cyf., Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE, Y Deyrnas Gyfunol. Cofrestrwyd yng Nghymru a Lloegr o'r rhif cofrestru 3798903 Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 665 Lines: 15 > For (1), a simple scenario has two threads: a reader and a watchdog. > The reader thread is stuck in a blocking read of an unreliable pipe. > The watchdog thread is designed to cancel the blocking read using > close on the reader's fd. The reader still has the fd open so the fd is not yet closed. This seems completely sane to me. Closing the *writer* fd would create an EOF which is the proper response. Alan - 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/