From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753003AbbIWIJF (ORCPT ); Wed, 23 Sep 2015 04:09:05 -0400 Received: from mail-wi0-f174.google.com ([209.85.212.174]:33755 "EHLO mail-wi0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752568AbbIWIIv (ORCPT ); Wed, 23 Sep 2015 04:08:51 -0400 From: Fabio Coatti To: Daniel Vetter , Jani Nikula , linux-kernel@vger.kernel.org Subject: WARNING: CPU: 3 PID: 0 at drivers/gpu/drm/i915/intel_display.c:11098 intel_check_page_flip+0xb2/0xfb() Date: Wed, 23 Sep 2015 10:08:48 +0200 Message-ID: <8441372.Bc65SeqTuB@calvin> User-Agent: KMail/4.14.10 (Linux/4.2.1; KDE/4.14.12; x86_64; ; ) MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi All, With freshly compiled 4.2.1, I get the following kernel warning: [mer set 23 09:22:27 2015] ------------[ cut here ]------------ [mer set 23 09:22:27 2015] WARNING: CPU: 3 PID: 0 at drivers/gpu/drm/i915/intel_display.c:11098 intel_check_page_flip+0xb2/0xfb() [mer set 23 09:22:27 2015] Kicking stuck page flip: queued at 1926, now 1930 [mer set 23 09:22:27 2015] Modules linked in: joydev bnep algif_skcipher btusb btrtl btbcm btintel bluetooth uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common cdc_wdm videodev cdc_acm hp_wmi sparse_keymap intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel snd_hda_codec_hdmi kvm snd_hda_codec_generic crct10dif_ pclmul crc32_pclmul iwldvm snd_hda_intel psmouse snd_hda_codec snd_hwdep snd_hda_core iwlwifi snd_pcm snd_timer snd soundcore wmi hp_accel lis3lv02d hp_wireless sch_fq_codel vboxn etadp(O) vboxnetflt(O) vboxdrv(O) dm_zero dm_persistent_data dm_service_time dm_round_robin dm_queue_length dm_multipath dm_delay virtio_pci virtio_blk virtio_balloon virtio_ring virtio fuse overlay linear raid0 dm_raid dm_snapshot dm_bufio dm_mirror dm_region_hash dm_log hid_apple ohci_pci [mer set 23 09:22:27 2015] ohci_hcd uhci_hcd [mer set 23 09:22:27 2015] CPU: 3 PID: 0 Comm: swapper/3 Tainted: G W O 4.2.1 #1 [mer set 23 09:22:27 2015] Hardware name: Hewlett-Packard HP EliteBook Folio 9470m/18DF, BIOS 68IBD Ver. F.40 02/01/2013 [mer set 23 09:22:27 2015] 0000000000000000 0000000000000009 ffffffff818f9bb5 ffff88023eac3de8 [mer set 23 09:22:27 2015] ffffffff810c4468 ffff8802320c7000 ffffffff815b7a46 0000000000000046 [mer set 23 09:22:27 2015] ffff8800b281d000 ffff8801f50f4d80 ffff880234c7c000 ffff8800b281d1a8 [mer set 23 09:22:27 2015] Call Trace: [mer set 23 09:22:27 2015] [] ? dump_stack+0x47/0x67 [mer set 23 09:22:27 2015] [] ? warn_slowpath_common+0x9d/0xb5 [mer set 23 09:22:27 2015] [] ? intel_check_page_flip+0xb2/0xfb [mer set 23 09:22:27 2015] [] ? warn_slowpath_fmt+0x4a/0x4f [mer set 23 09:22:27 2015] [] ? __intel_pageflip_stall_check+0xb2/0xdc [mer set 23 09:22:27 2015] [] ? intel_check_page_flip+0xb2/0xfb [mer set 23 09:22:27 2015] [] ? ironlake_irq_handler+0x382/0x919 [mer set 23 09:22:27 2015] [] ? handle_irq_event_percpu+0x3e/0x190 [mer set 23 09:22:27 2015] [] ? handle_irq_event+0x3f/0x62 [mer set 23 09:22:27 2015] [] ? handle_edge_irq+0xd4/0xf3 [mer set 23 09:22:27 2015] [] ? handle_irq+0x1f/0x23 [mer set 23 09:22:27 2015] [] ? do_IRQ+0x45/0xc4 [mer set 23 09:22:27 2015] [] ? common_interrupt+0x68/0x68 [mer set 23 09:22:27 2015] [] ? clockevents_program_event+0xd2/0xee [mer set 23 09:22:27 2015] [] ? cpuidle_enter_state+0x129/0x1fe [mer set 23 09:22:27 2015] [] ? cpuidle_enter_state+0xee/0x1fe [mer set 23 09:22:27 2015] [] ? cpu_startup_entry+0x1f9/0x2e0 [mer set 23 09:22:27 2015] [] ? start_secondary+0x14f/0x167 [mer set 23 09:22:27 2015] ---[ end trace 58065659e5553827 ]--- IIRC, this does not happens with previous kernel (4.2.0) Of course I'm available for any information or test, but please CC: me as I'm not subscribed to lkml. Many thanks! -- Fabio