From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from magic.merlins.org ([209.81.13.136]:37878 "EHLO mail1.merlins.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753272AbaB0THk (ORCPT ); Thu, 27 Feb 2014 14:07:40 -0500 Received: from [216.239.55.198] (port=56699 helo=legolas.merlins.org) by mail1.merlins.org with esmtpsa (Cipher TLS1.2:DHE_RSA_AES_128_CBC_SHA1:128) (Exim 4.80 #2) id 1WJ6J1-0000hn-G3 by authid with srv_auth_plain for ; Thu, 27 Feb 2014 11:07:39 -0800 Received: from merlin by legolas.merlins.org with local (Exim 4.80) (envelope-from ) id 1WJ6IV-0004FC-AZ for linux-btrfs@vger.kernel.org; Thu, 27 Feb 2014 11:07:07 -0800 Date: Thu, 27 Feb 2014 11:06:56 -0800 From: Marc MERLIN To: linux-btrfs@vger.kernel.org Subject: 3.14.0-rc3 btrfs scrub is preventing my laptop from going to sleep Message-ID: <20140227190656.GA28338@merlins.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-btrfs-owner@vger.kernel.org List-ID: This does not happen consistently, but sometimes: PM: Preparing system for mem sleep Freezing user space processes ... (...) Freezing of tasks failed after 20.002 seconds (1 tasks refusing to freeze, wq_busy=0): btrfs D ffff88017639c800 0 12239 12224 0x00000084 ffff880165ec1960 0000000000000086 ffff880165ec1fd8 ffff88017639c2d0 00000000000141c0 ffff88017639c2d0 ffff88007b874000 ffff8804062fa480 0000000000000000 ffff880175837ec0 ffff88007b874220 ffff880165ec1970 Call Trace: [] schedule+0x73/0x75 [] scrub_pages+0x27e/0x426 [] ? finish_wait+0x65/0x65 [] scrub_stripe+0xada/0xc9e [] scrub_chunk.isra.9+0xd6/0x10d [] scrub_enumerate_chunks+0x274/0x418 [] ? finish_wait+0x3/0x65 [] btrfs_scrub_dev+0x254/0x3cb [] ? __mnt_want_write+0x62/0x78 [] btrfs_ioctl+0x1114/0x24b1 [] ? ____cache_alloc+0x1c/0x29b [] ? kmem_cache_alloc_node+0xef/0x179 [] ? _raw_spin_unlock+0x17/0x2a [] do_vfs_ioctl+0x3d2/0x41d [] ? __fget+0x6f/0x79 [] SyS_ioctl+0x57/0x82 [] system_call_fastpath+0x1a/0x1f And then I end up with a hot laptop and a mostly dead battery in my backpack. As far as I know, this was not happening with 3.13, unless I'm doing something differently without knowing. My laptop went to sleep just fine while I was typing this Email, so I'm guessing it's only btrfs scrub that causes the problem with sleep. Marc -- "A mouse is a device used to point at the xterm you want to type in" - A.S.R. Microsoft is to operating systems .... .... what McDonalds is to gourmet cooking Home page: http://marc.merlins.org/ | PGP 1024R/763BE901