[Intel-gfx] [4.0-rc2] WARNING at intel_check_page_flip

[Ville Syrjälä]

On Wed, Mar 04, 2015 at 06:42:53PM +0100, Thomas Meyer wrote:
> Hi,
> 
> my kernel log is full with those messages:
> 
> [  262.685467] ------------[ cut here ]------------
> [  262.685481] WARNING: CPU: 0 PID: 50 at drivers/gpu/drm/i915/intel_display.c:9719 intel_check_page_flip+0x9a/0xe0()
> [  262.685484] WARN_ON(!in_irq())
> [  262.685486] Modules linked in:
> [  262.685489]  vfat fat bluetooth fuse ipt_MASQUERADE nf_nat_masquerade_ipv4 ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw kvm_intel iwldvm kvm mac80211 acer_wmi sparse_keymap snd_hda_codec_hdmi snd_hda_codec_realtek acerhdf snd_hda_codec_generic pcspkr joydev snd_hda_intel snd_hda_controller snd_hda_codec iwlwifi snd_hwdep snd_seq snd_seq_device cfg80211 snd_pcm rfkill snd_timer snd soundcore wmi acpi_cpufreq sch_fq_codel ipv6 usb_storage atl1c
> [  262.685547] CPU: 0 PID: 50 Comm: irq/26-i915 Tainted: G        W       4.0.0-rc2-23552-ga6c5170 #7
> [  262.685549] Hardware name: Acer Aspire 1810T/JM11-MS, BIOS v1.3310 03/25/2010
> [  262.685552]  0000000000000000 0000000057822dd5 ffff8800b4563c38 ffffffff816c0383
> [  262.685556]  0000000000000000 ffff8800b4563c90 ffff8800b4563c78 ffffffff81053955
> [  262.685559]  ffff8800b4563c78 ffff880233d01000 ffff880233d51800 ffff880235600000
> [  262.685564] Call Trace:
> [  262.685572]  [<ffffffff816c0383>] dump_stack+0x4c/0x6e
> [  262.685578]  [<ffffffff81053955>] warn_slowpath_common+0x85/0xc0
> [  262.685582]  [<ffffffff810539e0>] warn_slowpath_fmt+0x50/0x70
> [  262.685587]  [<ffffffff8148a1ba>] intel_check_page_flip+0x9a/0xe0
> [  262.685592]  [<ffffffff81454580>] i915_handle_vblank+0x50/0xb0
> [  262.685597]  [<ffffffff814683ef>] ? gen2_write32+0x2f/0xc0
> [  262.685601]  [<ffffffff81455926>] i965_irq_handler+0x2b6/0x390
> [  262.685606]  [<ffffffff810a1c10>] ? irq_thread_fn+0x40/0x40
> [  262.685610]  [<ffffffff810a1c38>] irq_forced_thread_fn+0x28/0x60
> [  262.685614]  [<ffffffff810a2157>] irq_thread+0x137/0x160
> [  262.685618]  [<ffffffff810a1ca0>] ? wake_threads_waitq+0x30/0x30
> [  262.685622]  [<ffffffff810a2020>] ? irq_thread_check_affinity+0x90/0x90
> [  262.685626]  [<ffffffff81070d03>] kthread+0xd3/0xf0
> [  262.685631]  [<ffffffff81070c30>] ? kthread_create_on_node+0x1b0/0x1b0
> [  262.685635]  [<ffffffff816c66ac>] ret_from_fork+0x7c/0xb0
> [  262.685639]  [<ffffffff81070c30>] ? kthread_create_on_node+0x1b0/0x1b0
> [  262.685642] ---[ end trace 7601ad6d6a76fe2f ]---
> 
> $ cat /proc/cmdline 
> BOOT_IMAGE=/vmlinuz-4.0.0-rc2-23552-ga6c5170 ... threadirqs LANG=de_DE.UTF-8
                                                   ^^^^^^^^^^

There's your problem.

-- 
Ville Syrjälä
Intel OTC