igt@ - GEM_WARN_ON(!*execlists->active)
0> [392.788104] <idle>-0 7..s1 380690554us : trace_ports.part.83: 0000:00:02.0 bcs0: completed { ccid:60000020 cf:339934! prio 0 }
<0> [392.788181] <idle>-0 7..s1 380690555us : process_csb: 0000:00:02.0 bcs0: bump timeslicing, interval:0
<0> [392.788231] <idle>-0 7d.s2 380690555us : __i915_request_submit: 0000:00:02.0 bcs0: fence cf:339936, current 339934
<0> [392.788339] <idle>-0 7d.s2 380690556us : __i915_request_submit: 0000:00:02.0 bcs0: fence cf:339938, current 339934
<0> [392.788419] <idle>-0 7d.s2 380690557us : __i915_request_submit: 0000:00:02.0 bcs0: fence cf:339940, current 339934
<0> [392.788498] <idle>-0 7d.s2 380690559us : trace_ports.part.83: 0000:00:02.0 bcs0: submit { ccid:60000020 cf:339940 prio 0 }
<0> [392.788580] <idle>-0 7..s1 380690574us : process_csb: 0000:00:02.0 bcs0: cs-irq head=4, tail=5
<0> [392.788656] <idle>-0 7..s1 380690575us : process_csb: 0000:00:02.0 bcs0: csb[5]: status=0x03ff8018:0x00008000
<0> [392.788736] <idle>-0 7..s1 380690598us : process_csb: process_csb:2638 GEM_BUG_ON(!*execlists->active)
<0> [392.788770] ---------------------------------
<4> [392.788806] ------------[ cut here ]------------
<4> [392.788807] WARNING: CPU: 7 PID: 0 at kernel/trace/trace.c:3507 trace_find_next_entry+0xd1/0xe0
<4> [392.788808] Modules linked in: vgem snd_hda_codec_hdmi mei_hdcp i915 x86_pkg_temp_thermal coretemp crct10dif_pclmul crc32_pclmul snd_hda_intel snd_intel_dspcfg snd_hda_codec snd_hwdep snd_hda_core ghash_clmulni_intel cdc_ether usbnet mii e1000e snd_pcm ptp mei_me pps_core mei intel_lpss_pci prime_numbers
<4> [392.788820] CPU: 7 PID: 0 Comm: swapper/7 Tainted: G U 5.8.0-rc1-CI-CI_DRM_8629+ #1
<4> [392.788821] Hardware name: Intel Corporation Tiger Lake Client Platform/TigerLake U DDR4 SODIMM RVP, BIOS TGLSFWI1.R00.2457.A16.1912270059 12/27/2019
<4> [392.788822] RIP: 0010:trace_find_next_entry+0xd1/0xe0
<4> [392.788823] Code: 48 89 83 38 21 00 00 4c 89 e1 31 d2 48 89 ee 48 89 df e8 e2 b5 ff ff 44 89 ab 4c 21 00 00 5b 5d 41 5c 41 5d c3 49 63 d5 eb bb <0f> 0b 49 63 d5 eb b4 31 c0 eb e9 0f 1f 40 00 53 48 8d 8f 58 21 00
<4> [392.788823] RSP: 0018:ffffc90000298dc8 EFLAGS: 00010046
<4> [392.788824] RAX: ffffffff83df2b00 RBX: ffffffff83df0920 RCX: 0000000000000000
<4> [392.788825] RDX: ffffc90000298df0 RSI: ffff8884743ac0e0 RDI: ffffffff83df0920
<4> [392.788826] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
<4> [392.788826] R10: 00000000a0858db5 R11: 0000000000000000 R12: ffffc90000298df0
<4> [392.788827] R13: 0000000000000050 R14: 00000000001aa301 R15: ffffffff82656ee0
<4> [392.788827] FS: 0000000000000000(0000) GS:ffff8884a0180000(0000) knlGS:0000000000000000
<4> [392.788828] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4> [392.788829] CR2: 00007f4f27aaf000 CR3: 0000000005610002 CR4: 0000000000760ee0
<4> [392.788829] PKRU: 55555554
<4> [392.788830] Call Trace:
<4> [392.788830] <IRQ>
<4> [392.788831] trace_print_lat_context+0x37/0x2a0
<4> [392.788831] ? cpumask_next+0x16/0x20
<4> [392.788832] ? __find_next_entry+0x80/0x180
<4> [392.788833] print_trace_line+0x190/0x4e0
<4> [392.788833] ftrace_dump+0x1cc/0x280
<4> [392.788834] process_csb+0x394/0x850 [i915]
<4> [392.788834] execlists_submission_tasklet+0x2f/0x140 [i915]
<4> [392.788835] tasklet_action_common.isra.17+0x6c/0x1c0
<4> [392.788835] __do_softirq+0xdf/0x498
<4> [392.788836] asm_call_on_stack+0xf/0x20
<4> [392.788836] </IRQ>
<4> [392.788837] do_softirq_own_stack+0xa1/0xc0
<4> [392.788837] irq_exit_rcu+0xb5/0xc0
<4> [392.788838] sysvec_apic_timer_interrupt+0x4b/0x100
<4> [392.788839] asm_sysvec_apic_timer_interrupt+0x12/0x20
<4> [392.788839] RIP: 0010:cpuidle_enter_state+0xb6/0x410
<4> [392.788840] Code: 00 31 ff e8 0c 5b 89 ff 80 7c 24 0b 00 74 12 9c 58 f6 c4 02 0f 85 31 03 00 00 31 ff e8 a3 86 90 ff e8 6e bd 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> [392.788841] RSP: 0018:ffffc9000015be78 EFLAGS: 00000202
<4> [392.788842] RAX: 0000000000000007 RBX: ffffe8ffffd80a90 RCX: 0000000000000000
<4> [392.788842] RDX: 0000000000000000 RSI: ffffffff82389a36 RDI: ffffffff8233014f
<4> [392.788843] RBP: ffffffff826b42c0 R08: 0000000000000000 R09: 0000000000000000
<4> [392.788844] R10: 0000000000000001 R11: 0000000000000000 R12: 000000589e856ee9
<4> [392.788844] R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000001
<4> [392.788845] ? cpuidle_enter_state+0xb2/0x410
<4> [392.788845] cpuidle_enter+0x24/0x40
<4> [392.788846] do_idle+0x1f7/0x260
<4> [392.788846] cpu_startup_entry+0x14/0x20
<4> [392.788847] start_secondary+0x158/0x1a0
<4> [392.788847] secondary_startup_64+0xa4/0xb0
<4> [392.788848] irq event stamp: 23517375
<4> [392.788849] hardirqs last enabled at (23517374): [<ffffffff81131a2f>] console_unlock+0x4cf/0x5a0
<4> [392.788849] hardirqs last disabled at (23517375): [<ffffffff811a46b5>] ftrace_dump+0x45/0x280
<4> [392.788850] softirqs last enabled at (23517336): [<ffffffff810b948a>] irq_enter_rcu+0x6a/0x70
<4> [392.788851] softirqs last disabled at (23517337): [<ffffffff81c00f8f>] asm_call_on_stack+0xf/0x20
<4> [392.788851] ---[ end trace f0eed92d56b7135f ]---
<4> [392.788934] ------------[ cut here ]------------
92.789390] ---[ end trace f0eed92d56b71360 ]---Edited by Chris Wilson