igt@i915_selftest@live@execlists - incomplete - Sending NMI from CPU \d to CPUs \d:\n.*NMI backtrace for cpu \d\n.*Tainted
<4> [377.953252] 1 lock held by i915_selftest/4895:
<4> [377.953253]
<4> [377.953254] =============================================
<3> [407.913003] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
<3> [407.913012] rcu: 3-....: (2 GPs behind) idle=76e/0/0x1 softirq=41828/41829 fqs=16249
<4> [407.913012] (detected by 6, t=65002 jiffies, g=117665, q=506)
<6> [407.913012] Sending NMI from CPU 6 to CPUs 3:
<4> [342.915087] NMI backtrace for cpu 3
<4> [342.915087] CPU: 3 PID: 0 Comm: swapper/3 Tainted: G U W 5.8.0-rc3-CI-CI_DRM_8676+ #1
<4> [342.915087] Hardware name: Intel Corporation CometLake Client Platform/CometLake S UDIMM (ERB/CRB), BIOS CMLSFWR1.R00.1263.D00.1906260926 06/26/2019
<4> [342.915087] RIP: 0010:__intel_wait_for_register_fw+0x1df/0x270 [i915]
<4> [342.915087] Code: 08 65 8b 3d e3 63 a4 5f e8 de 68 b2 e0 44 8b 7c 24 10 49 89 c6 48 63 44 24 14 48 89 04 24 eb 3b 49 8b 45 00 4c 01 f8 44 8b 10 <89> d8 44 21 d0 44 39 e0 74 52 48 89 e8 4c 29 f0 48 3b 04 24 0f 83
<4> [342.915087] RSP: 0018:ffffc900001e4e08 EFLAGS: 00000286
<4> [342.915087] RAX: ffffc9000120209c RBX: 0000000000000200 RCX: 0000000000000102
<4> [342.915087] RDX: 0000000000000102 RSI: 0000005ef9846987 RDI: 00000000ffffffff
<4> [342.915087] RBP: 0000004fd754fc91 R08: 0000000000000002 R09: 000000000003a3c0
<4> [342.915087] R10: 0000000000000100 R11: ffff888449096400 R12: 0000000000000200
<4> [342.915087] R13: ffff88832e020f80 R14: 0000004fd754fc91 R15: 000000000000209c
<4> [342.915087] FS: 0000000000000000(0000) GS:ffff88844b980000(0000) knlGS:0000000000000000
<4> [342.915087] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4> [342.915087] CR2: 000055ffda870ed8 CR3: 0000000005610002 CR4: 00000000003606e0
<4> [342.915087] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
<4> [342.915087] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
<4> [342.915087] Call Trace:
<4> [342.915087] <IRQ>
<4> [342.915087] intel_engine_stop_cs+0x91/0x100 [i915]
<4> [342.915087] execlists_reset_prepare+0x85/0x120 [i915]
<4> [342.915087] intel_engine_reset+0x93/0x260 [i915]
<4> [342.915087] execlists_reset+0x27d/0x360 [i915]
<4> [342.915087] ? fwtable_read32+0x285/0x320 [i915]
<4> [342.915087] execlists_submission_tasklet+0x12d/0x140 [i915]
<4> [342.915087] tasklet_action_common.isra.17+0x6c/0x1c0
<4> [342.915087] __do_softirq+0xdf/0x498
<4> [342.915087] ? handle_fasteoi_irq+0x150/0x150
<4> [342.915087] asm_call_on_stack+0xf/0x20
<4> [342.915087] </IRQ>
<4> [342.915087] do_softirq_own_stack+0xa1/0xc0
<4> [342.915087] irq_exit_rcu+0xb5/0xc0
<4> [342.915087] common_interrupt+0xf7/0x260
<4> [342.915087] asm_common_interrupt+0x1e/0x40
<4> [342.915087] RIP: 0010:cpuidle_enter_state+0xb6/0x410
<4> [342.915087] Code: 00 31 ff e8 3c 51 89 ff 80 7c 24 0b 00 74 12 9c 58 f6 c4 02 0f 85 31 03 00 00 31 ff e8 03 7d 90 ff e8 de b4 94 ff fb 45 85 ed <0f> 88 c7 02 00 00 49 63 c5 4c 2b 24 24 48 8d 14 40 48 8d 14 90 48
<4> [342.915087] RSP: 0018:ffffc90000117e70 EFLAGS: 00000206
<4> [342.915087] RAX: 0000000000000003 RBX: ffffe8ffff9ab7e0 RCX: 0000000000000000
<4> [342.915087] RDX: 0000000000000000 RSI: ffffffff8238a69e RDI: ffffffff82330cc7
<4> [342.915087] RBP: ffffffff826b4e00 R08: 0000000000000000 R09: 0000000000000000
<4> [342.915087] R10: 0000000000000001 R11: 0000000000000000 R12: 0000004fd74562a0
<4> [342.915087] R13: 0000000000000003 R14: 0000000000000003 R15: 0000000000000003
<4> [342.915087] cpuidle_enter+0x24/0x40
<4> [342.915087] do_idle+0x22f/0x2d0
<4> [342.915087] cpu_startup_entry+0x14/0x20
<4> [342.915087] start_secondary+0x158/0x1a0
<4> [342.915087] secondary_startup_64+0xa4/0xb0
<5> [407.913070] i915 0000:00:02.0: [drm] Resetting rcs0 for CS error
<6> [407.913070] i915 0000:00:02.0: [drm] GPU HANG: ecode 9:1:21724110
<3> [408.161112] INFO: task khugepaged:76 blocked for more than 60 seconds.
<3> [408.161116] Tainted: G U W 5.8.0-rc3-CI-CI_DRM_8676+ #1
<3> [408.161118] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
<6> [408.161121] khugepaged D13776 76 2 0x00004000