[SKL] Few tests - Incomplete - INFO: task kworker/.* blocked for more than 30 seconds
https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_994/fi-skl-6600u/igt@gem_tiled_pread_basic.html
Dmesg
<6> [163.076993] Console: switching to colour dummy device 80x25
<6> [163.077601] [IGT] gem_tiled_pread_basic: executing
<7> [164.980431] i915 0000:00:02.0: [drm:intel_pps_vdd_off_sync_unlocked [i915]] Turning [ENCODER:94:DDI A/PHY A] VDD off
<7> [164.980983] i915 0000:00:02.0: [drm:intel_pps_vdd_off_sync_unlocked [i915]] PP_STATUS: 0x80000008 PP_CONTROL: 0x00000007
<7> [164.981569] i915 0000:00:02.0: [drm:intel_power_well_disable [i915]] disabling DC off
<7> [164.982272] i915 0000:00:02.0: [drm:skl_enable_dc6 [i915]] Enabling DC6
<7> [164.982882] i915 0000:00:02.0: [drm:gen9_set_dc_state.part.15 [i915]] Setting DC state from 00 to 02
<3> [211.828498] INFO: task kworker/u8:12:980 blocked for more than 30 seconds.
<3> [211.828868] Tainted: G W 5.16.0-drmtip_994-g31b826a55fd4+ #1
<3> [211.829042] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
<6> [211.829401] task:kworker/u8:12 state:D stack:12696 pid: 980 ppid: 2 flags:0x00004000
<6> [211.829461] Workqueue: writeback wb_workfn (flush-259:0)
<6> [211.829519] Call Trace:
<6> [211.829535] <TASK>
<6> [211.829582] __schedule+0x42c/0xaa0
<6> [211.829617] ? blk_flush_plug+0xed/0x130
<6> [211.829688] schedule+0x3f/0xc0
<6> [211.829714] io_schedule+0x36/0x60
<6> [211.829740] blk_mq_get_tag+0x115/0x270
<6> [211.829781] ? finish_wait+0x80/0x80
<6> [211.829851] __blk_mq_alloc_requests+0x16c/0x360
<6> [211.829884] ? blk_attempt_plug_merge+0x56/0x60
<6> [211.829941] blk_mq_submit_bio+0x204/0xa30
<6> [211.830054] submit_bio_noacct+0x254/0x2a0
<6> [211.830122] ext4_io_submit+0x44/0x50
<6> [211.830149] ext4_bio_write_page+0x1e2/0x570
<6> [211.830296] mpage_submit_page+0x49/0x60
<6> [211.830333] mpage_process_page_bufs+0xfc/0x110
<6> [211.830369] mpage_prepare_extent_to_map+0x247/0x3a0
<6> [211.830525] ext4_writepages+0x30d/0x1070
<6> [211.830602] ? __lock_acquire+0x5e6/0x2580
<6> [211.830743] do_writepages+0xc1/0x180
<6> [211.830824] __writeback_single_inode+0x53/0x5b0
<6> [211.830880] writeback_sb_inodes+0x200/0x520
<6> [211.830997] __writeback_inodes_wb+0x5a/0xc0
<6> [211.831053] wb_writeback+0x2c2/0x440
<6> [211.831136] wb_workfn+0x37e/0x600
<6> [211.831393] process_one_work+0x278/0x5c0
<6> [211.831488] worker_thread+0x37/0x380
<6> [211.831534] ? process_one_work+0x5c0/0x5c0
<6> [211.831561] kthread+0x170/0x1a0
<6> [211.831587] ? set_kthread_struct+0x40/0x40
<6> [211.831632] ret_from_fork+0x22/0x30
<6> [211.831757] </TASK>
<3> [211.831791] INFO: task gem_tiled_pread:1173 blocked for more than 30 seconds.
<3> [211.832083] Tainted: G W 5.16.0-drmtip_994-g31b826a55fd4+ #1
<3> [211.832786] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
<6> [211.833101] task:gem_tiled_pread state:D stack:13352 pid: 1173 ppid: 912 flags:0x00000000
<6> [211.833149] Call Trace:
<6> [211.833162] <TASK>
<6> [211.833319] __schedule+0x42c/0xaa0
<6> [211.833346] ? _raw_spin_unlock_irqrestore+0x3d/0x60
<6> [211.833418] schedule+0x3f/0xc0
<6> [211.833443] wb_wait_for_completion+0x5e/0x90
<6> [211.833477] ? finish_wait+0x80/0x80
<6> [211.833522] sync_inodes_sb+0xe4/0x470
<6> [211.833634] ? __x64_sys_tee+0xc0/0xc0
<6> [211.833669] iterate_supers+0x87/0xf0
<6> [211.833719] ksys_sync+0x3b/0xa0
<6> [211.833753] __do_sys_sync+0x5/0x10
<6> [211.833779] do_syscall_64+0x3a/0xb0
<6> [211.833814] entry_SYSCALL_64_after_hwframe+0x44/0xae
<6> [211.833842] RIP: 0033:0x7f38e05a338b
<6> [211.833864] RSP: 002b:00007ffd74f7b5b8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a2
<6> [211.833897] RAX: ffffffffffffffda RBX: 000055e90a87e040 RCX: 00007f38e05a338b
<6> [211.833916] RDX: 000055e90a85cfb0 RSI: 000055e90a85d070 RDI: 000055e90a858010
<6> [211.833934] RBP: 0000000000000001 R08: 0000000000000006 R09: 0000000000000000
<6> [211.833958] R10: 00007f38e06c19e6 R11: 0000000000000206 R12: 0000000000000000
<6> [211.833961] R13: 00007f38e073e2ff R14: 00007f38e0975528 R15: 00007f38e073ec30