Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754253Ab3IYTQN (ORCPT ); Wed, 25 Sep 2013 15:16:13 -0400 Received: from hrndva-omtalb.mail.rr.com ([71.74.56.122]:12244 "EHLO hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752755Ab3IYTQL (ORCPT ); Wed, 25 Sep 2013 15:16:11 -0400 X-Authority-Analysis: v=2.0 cv=N7qr5hBB c=1 sm=0 a=/DbS/tiKggfTkRRHPZEB4g==:17 a=Qsx_du5GiBkA:10 a=sCfsyOEanakA:10 a=E0Bdfvx0tn8A:10 a=S1A5HrydsesA:10 a=8nJEP1OIZ-IA:10 a=fxJcL_dCAAAA:8 a=KGjhK52YXX0A:10 a=4rf29q15wrwA:10 a=QfKxxUxMAAAA:8 a=jUFcgjVZ8zLlMqVYKCYA:9 a=wPNLvfGTeEIA:10 a=/DbS/tiKggfTkRRHPZEB4g==:117 X-Cloudmark-Score: 0 X-Authenticated-User: X-Originating-IP: 67.78.168.186 Message-ID: <52433113.1000806@ubuntu.com> Date: Wed, 25 Sep 2013 14:53:07 -0400 From: Phillip Susi User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:17.0) Gecko/20130801 Thunderbird/17.0.8 MIME-Version: 1.0 To: Linux Kernel Mailing List , linux-ide@vger.kernel.org Subject: Tracking down a workqueue io source X-Enigmail-Version: 1.5.2 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 Content-Length: 1317 Lines: 28 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I worked up some patches to use the ata SLEEP command instead of STANDBY to save more power, but I have found that something in the kernel keeps issuing a request to the disk ( no mounted filesystems on it ) every 10 minutes. This request resets the link bringing the disk back up to STANDBY mode. blktrace shows the process name is "pool" so I guess it is a work queue item? Inserting a dump_stack() was not helpful. How can I track down the source of this request? -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.17 (MingW32) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJSQzETAAoJEJrBOlT6nu75Pu0IAMOSNFLbklwCjmVMFZjuQk2x zrc6xOfPPmPsFqHUPG1TaoSUgzGJXsbZLUeaVFV2ZEIOFJPVl8Vn4Izkzyemk9dp xtgbtECLMCMZujpqGpL6UwBwBepUfDvoRSpdpcjZ28XByrXS1V8SrQtBw/4HtnDm Pkmf2MXxlqGDhAxCCuKHfnvjlP2pjfEt8teFH9Vsj4znMJw4BUC8IOepDATwbGd3 WEEv5kqmN27K7ZiEE3zo3jaQMlUtWrJwdyU+1zwvvdTpos/USdem9P4n80s5+CYm S7e0awRKOjleEZnozyNU9VO5tLViuKyp2096/6+gvna7MIE/Mgj7aWI/S4+A28c= =f2IA -----END PGP SIGNATURE----- -- 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/