From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754065Ab1KHIdw (ORCPT ); Tue, 8 Nov 2011 03:33:52 -0500 Received: from mail-fx0-f46.google.com ([209.85.161.46]:60093 "EHLO mail-fx0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753682Ab1KHIdu (ORCPT ); Tue, 8 Nov 2011 03:33:50 -0500 Message-ID: <4EB8E969.6010502@suse.cz> Date: Tue, 08 Nov 2011 09:33:45 +0100 From: Jiri Slaby User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:7.0.1) Gecko/20110929 Thunderbird/7.0.1 MIME-Version: 1.0 To: "Rafael J. Wysocki" CC: linux-pm@vger.kernel.org, LKML , Jiri Slaby , linux-mm@kvack.org, Andrea Arcangeli , Andrew Morton Subject: khugepaged doesn't want to freeze X-Enigmail-Version: 1.4a1pre Content-Type: text/plain; charset=ISO-8859-2 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, yesterday my machine refused to suspend several times. It was always due to khugepaged refusing to freeze. It's with 3.1.0-next-20111025. In the end, after several tries, it finally did. But it's indeed bothering me. PM: Syncing filesystems ... done. PM: Preparing system for mem sleep Freezing user space processes ... (elapsed 0.01 seconds) done. Freezing remaining freezable tasks ... Freezing of tasks failed after 20.01 seconds (1 tasks refusing to freeze, wq_busy=0): khugepaged S 0000000000000001 0 634 2 0x00800000 ffff8801c11cbc90 0000000000000046 0000000000000003 0000000000000000 ffff8801c16f73e0 ffff8801c11cbfd8 ffff8801c11cbfd8 ffff8801c11cbfd8 ffffffff81a0d020 ffff8801c16f73e0 ffff8801c11cbd08 0000000100000001 Call Trace: [] schedule+0x3a/0x50 [] schedule_timeout+0x14e/0x220 [] ? init_timer_deferrable_key+0x20/0x20 [] schedule_timeout_interruptible+0x19/0x20 [] khugepaged_alloc_hugepage+0xc0/0xf0 [] ? add_wait_queue+0x60/0x60 [] khugepaged+0x85/0x1280 [] ? add_wait_queue+0x60/0x60 [] ? collect_mm_slot+0xa0/0xa0 [] kthread+0x87/0x90 [] kernel_thread_helper+0x4/0x10 [] ? kthread_worker_fn+0x1a0/0x1a0 [] ? gs_change+0xb/0xb Restarting tasks ... done. thanks, -- js suse labs