[ 1634.267041] WARNING: CPU: 0 PID: 0 at drivers/gpu/drm/i915/intel_uncore.c:192 gen6_gt_check_fifodbg+0x44/0x60 [i915] [ 1634.267052] GT wake FIFO error 0x6 [ 1634.267060] Modules linked in: vgem i915 intel_gtt i2c_algo_bit intel_powerclamp drm_kms_helper crct10dif_pclmul crc32_pclmul prime_numbers crc32c_intel drm ghash_clmulni_intel cryptd lpc_ich i2c_i801 mfd_core battery video i2c_designware_platform i2c_designware_core button autofs4 sd_mod ahci libahci libata scsi_mod fan thermal i2c_hid i2c_core hid [ 1634.267108] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.10.0-rc7+ #6 [ 1634.267115] Hardware name: GIGABYTE GB-BXBT-1900/MZBAYAB-00, BIOS F8 03/02/2016 [ 1634.267125] Call Trace: [ 1634.267133] <IRQ> [ 1634.267144] dump_stack+0x63/0x8e [ 1634.267153] __warn+0xd1/0xf0 [ 1634.267162] warn_slowpath_fmt+0x4f/0x60 [ 1634.267193] gen6_gt_check_fifodbg+0x44/0x60 [i915] [ 1634.267224] fw_domains_put_with_fifo+0x1a/0x20 [i915] [ 1634.267255] intel_uncore_fw_release_timer+0x54/0xe0 [i915] [ 1634.267285] ? fwtable_write32+0x1d0/0x1d0 [i915] [ 1634.267295] __hrtimer_run_queues+0xe6/0x280 [ 1634.267303] hrtimer_interrupt+0xa8/0x1a0 [ 1634.267312] local_apic_timer_interrupt+0x38/0x60 [ 1634.267321] smp_apic_timer_interrupt+0x38/0x50 [ 1634.267329] apic_timer_interrupt+0x89/0x90 [ 1634.267338] RIP: 0010:cpuidle_enter_state+0x153/0x2f0 [ 1634.267346] RSP: 0018:ffffffff81803df8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 [ 1634.267357] RAX: ffff88013fc183c0 RBX: ffffe8ffffc08d00 RCX: 000000000000001f [ 1634.267364] RDX: 0000000000000000 RSI: ffff88013fc15a98 RDI: 0000000000000000 [ 1634.267371] RBP: ffffffff81803e30 R08: 0000000000000002 R09: 0000000000000d3d [ 1634.267379] R10: 00000000ffffffff R11: ffff88013fc152a4 R12: 0000000000000002 [ 1634.267386] R13: 0000000000000002 R14: 0000000000000000 R15: 0000017c81dc3bbf [ 1634.267393] </IRQ> [ 1634.267402] ? cpuidle_enter_state+0x12f/0x2f0 [ 1634.267411] cpuidle_enter+0x17/0x20 [ 1634.267420] call_cpuidle+0x2c/0x50 [ 1634.267427] do_idle+0x102/0x1e0 [ 1634.267435] cpu_startup_entry+0x1d/0x20 [ 1634.267444] rest_init+0x85/0x90 [ 1634.267452] start_kernel+0x41c/0x429 [ 1634.267461] ? early_idt_handler_array+0x120/0x120 [ 1634.267469] x86_64_start_reservations+0x2a/0x2c [ 1634.267477] x86_64_start_kernel+0x13b/0x14a [ 1634.267485] start_cpu+0x14/0x14 [ 1634.267493] ---[ end trace 641f8bbd6db3aac5 ]--- [ 1634.811847] [IGT] gem_concurrent_blit: starting subtest 4KiB-tiny-prw-render-early-read-bomb [ 1636.555834] [IGT] gem_concurrent_blit: starting subtest 4KiB-tiny-prw-render-read-read-bcs-bomb [ 1638.239774] [IGT] gem_concurrent_blit: starting subtest 4KiB-tiny-prw-render-read-read-rcs-bomb [ 1639.496074] [IGT] gem_concurrent_blit: starting subtest 4KiB-tiny-prw-render-write-read-bcs-bomb [ 1661.007454] INFO: rcu_sched detected stalls on CPUs/tasks: [ 1661.007480] 0-...: (1 GPs behind) idle=595/140000000000001/0 softirq=603560/603564 fqs=8 [ 1661.007492] 2-...: (1 GPs behind) idle=47d/140000000000000/0 softirq=370647/370648 fqs=8 [ 1661.007502] (detected by 3, t=5252 jiffies, g=97755, c=97754, q=896) [ 1661.007512] Task dump for CPU 0: [ 1661.007519] i915/signal:1 S 0 296 2 0x00000008 [ 1661.007528] Call Trace: [ 1661.007560] ? intel_breadcrumbs_signaler+0x23f/0x380 [i915] [ 1661.007570] ? wake_up_atomic_t+0x30/0x30 [ 1661.007578] ? kthread+0x114/0x150 [ 1661.007608] ? intel_engine_remove_wait.part.13+0x40/0x40 [i915] [ 1661.007617] ? kthread_park+0x90/0x90 [ 1661.007625] ? ret_from_fork+0x2c/0x40 [ 1661.007633] Task dump for CPU 2: [ 1661.007639] i915/signal:0 S 0 295 2 0x00000008 [ 1661.007648] Call Trace: [ 1661.007675] ? i915_sw_fence_complete+0x2a/0x50 [i915] [ 1661.007702] ? dma_i915_sw_fence_wake+0x2b/0x70 [i915] [ 1661.007712] ? dma_fence_signal+0xe4/0x110 [ 1661.007741] ? intel_breadcrumbs_signaler+0x1b9/0x380 [i915] [ 1661.007750] ? wake_up_atomic_t+0x30/0x30 [ 1661.007758] ? kthread+0x114/0x150 [ 1661.007787] ? intel_engine_remove_wait.part.13+0x40/0x40 [i915] [ 1661.007796] ? kthread_park+0x90/0x90 [ 1661.007804] ? ret_from_fork+0x2c/0x40 [ 1661.007813] rcu_sched kthread starved for 5234 jiffies! g97755 c97754 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x1 [ 1661.007823] rcu_sched S 0 7 2 0x00000000 [ 1661.007832] Call Trace: [ 1661.007840] __schedule+0x17f/0x640 [ 1661.007848] schedule+0x3d/0x90 [ 1661.007856] schedule_timeout+0x1c1/0x3b0 [ 1661.007865] ? lock_timer_base+0xa0/0xa0 [ 1661.007874] rcu_gp_kthread+0x3fe/0x850 [ 1661.007882] kthread+0x114/0x150 [ 1661.007890] ? force_qs_rnp+0x180/0x180 [ 1661.007898] ? kthread_park+0x90/0x90 [ 1661.007909] ret_from_fork+0x2c/0x40 [ 1688.323456] NMI watchdog: BUG: soft lockup - CPU#3 stuck for 22s! [cc1:28458] [ 1688.323466] Modules linked in: vgem i915 intel_gtt i2c_algo_bit intel_powerclamp drm_kms_helper crct10dif_pclmul crc32_pclmul prime_numbers crc32c_intel drm ghash_clmulni_intel cryptd lpc_ich i2c_i801 mfd_core battery video i2c_designware_platform i2c_designware_core button autofs4 sd_mod ahci libahci libata scsi_mod fan thermal i2c_hid i2c_core hid [ 1688.323507] CPU: 3 PID: 28458 Comm: cc1 Tainted: G W 4.10.0-rc7+ #6 [ 1688.323516] Hardware name: GIGABYTE GB-BXBT-1900/MZBAYAB-00, BIOS F8 03/02/2016 [ 1688.323526] task: ffff880138635400 task.stack: ffffc90004390000 [ 1688.323536] RIP: 0010:smp_call_function_single+0xc6/0x110 [ 1688.323544] RSP: 0000:ffffc90004393c48 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff10 [ 1688.323554] RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000000 [ 1688.323561] RDX: 0000000000000001 RSI: 00000000000000fb RDI: 0000000000000286 [ 1688.323568] RBP: ffffc90004393c88 R08: 0000000000000007 R09: 0000000000000000 [ 1688.323576] R10: 0000000000001000 R11: 00000000018e49e0 R12: ffffffff8106acf0 [ 1688.323650] R13: 0000000000000002 R14: ffffffff8106acf0 R15: ffffc90004393ce0 [ 1688.323659] FS: 00002b00114d2bc0(0000) GS:ffff88013fd80000(0000) knlGS:0000000000000000 [ 1688.323668] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1688.323675] CR2: 00002b0015c67004 CR3: 0000000138a2d000 CR4: 00000000001006e0 [ 1688.323682] Call Trace: [ 1688.323691] ? do_flush_tlb_all+0x40/0x40 [ 1688.323699] smp_call_function_many+0x211/0x250 [ 1688.323708] native_flush_tlb_others+0x56/0x120 [ 1688.323716] flush_tlb_page+0x5c/0xa0 [ 1688.323724] ptep_clear_flush+0x4e/0x60 [ 1688.323732] wp_page_copy+0x2d0/0x660 [ 1688.323740] do_wp_page+0x85/0x4a0 [ 1688.323748] ? page_add_new_anon_rmap+0x8d/0xc0 [ 1688.323755] handle_mm_fault+0x7f0/0x1080 [ 1688.323765] __do_page_fault+0x206/0x440 [ 1688.323773] do_page_fault+0x22/0x30 [ 1688.323781] page_fault+0x28/0x30 [ 1688.323788] RIP: 0033:0xc9cb57 [ 1688.323794] RSP: 002b:00007ffc829e0730 EFLAGS: 00010202 [ 1688.323801] RAX: 00002b0015c67000 RBX: 00002b0015003150 RCX: 0000000000000001 [ 1688.323808] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 1688.323815] RBP: 0000000000000000 R08: 00000000018e49e0 R09: 0000000000000000 [ 1688.323822] R10: 0000000000001000 R11: 00000000018e49e0 R12: 0000000000000004 [ 1688.323829] R13: 00002b0015c54a28 R14: 0000000000000001 R15: 00002b0015be35b0 [ 1688.323837] Code: 65 ff 0d 36 19 f2 7e 48 83 c4 30 5b 41 5c 5d c3 48 8d 75 d0 48 89 d1 89 df 4c 89 e2 e8 24 fe ff ff 8b 55 e8 83 e2 01 74 0a f3 90 <8b> 55 e8 83 e2 01 75 f6 eb cb 8b 05 82 e5 9a 00 85 c0 75 8d 80
I'm pretty sure now this was self-inflicted (by using I915_WRITE_FW in a byt irq handler).
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