From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754669AbYJUUXe (ORCPT ); Tue, 21 Oct 2008 16:23:34 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754305AbYJUUXW (ORCPT ); Tue, 21 Oct 2008 16:23:22 -0400 Received: from az33egw02.freescale.net ([192.88.158.103]:62496 "EHLO az33egw02.freescale.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754149AbYJUUXV (ORCPT ); Tue, 21 Oct 2008 16:23:21 -0400 Message-ID: <48FE3A34.5040105@freescale.com> Date: Tue, 21 Oct 2008 15:23:16 -0500 From: Timur Tabi User-Agent: Mozilla/5.0 (X11; U; Linux i686 (x86_64); en-US; rv:1.8.1.16) Gecko/20080702 SeaMonkey/1.1.11 MIME-Version: 1.0 To: Dan Williams CC: linux-kernel@vger.kernel.org, Kumar Gala Subject: Re: Best method for sending messages to user space? References: <48FE1741.1000502@freescale.com> <48FE30D8.6050705@freescale.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Dan Williams wrote: > fd = open("/sys/block/md0/md/array_state"); > do { > read(buf, fd, len); > act_on_message(buf); > select(...); /* wait for next sysfs_notify event */ > lseek(fd, 0, SEEK_SET); /* seek back so we can read the new state */ > } while (1); I meant from the kernel side. I added a call to sysfs_notify(), and I didn't see any sysfs entries being created, so I presume I need to set up sysfs before I call sysfs_notify(), but I can't figure out what that setup is. -- Timur Tabi Linux kernel developer at Freescale