Bug 111196

Summary: [CI][SHARDS] igt@i915_selftest@mock_vma - dmesg-warn - watchdog: BUG: soft lockup - CPU#\d+ stuck
Product: DRI Reporter: Martin Peres <martin.peres>
Component: DRM/IntelAssignee: Intel GFX Bugs mailing list <intel-gfx-bugs>
Status: CLOSED FIXED QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: normal    
Priority: high CC: intel-gfx-bugs
Version: XOrg git   
Hardware: Other   
OS: All   
Whiteboard: ReadyForDev
i915 platform: SKL i915 features: GEM/Other

Description Martin Peres 2019-07-23 07:33:22 UTC 
https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6533/shard-skl3/igt@i915_selftest@mock_vma.html

<6> [2489.965844] i915: Running i915_vma_mock_selftests/igt_vma_partial
<0> [2515.074365] watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [i915_selftest:5616]
<4> [2515.074511] Modules linked in: i915(+) i2c_dev vgem snd_hda_codec_hdmi x86_pkg_temp_thermal coretemp snd_hda_codec crct10dif_pclmul crc32_pclmul snd_hwdep snd_hda_core ghash_clmulni_intel btusb btrtl cdc_ether btbcm btintel usbnet snd_pcm bluetooth r8152 mii ecdh_generic ecc i2c_hid pinctrl_sunrisepoint pinctrl_intel prime_numbers [last unloaded: i915]
<4> [2515.074623] irq event stamp: 3675472
<4> [2515.074648] hardirqs last  enabled at (3675471): [<ffffffff81236297>] __slab_free+0x347/0x460
<4> [2515.074667] hardirqs last disabled at (3675472): [<ffffffff8100199a>] trace_hardirqs_off_thunk+0x1a/0x20
<4> [2515.074683] softirqs last  enabled at (3675386): [<ffffffff81c002eb>] __do_softirq+0x2eb/0x465
<4> [2515.074698] softirqs last disabled at (3675379): [<ffffffff810b62be>] irq_exit+0xae/0xc0
<4> [2515.074715] CPU: 3 PID: 5616 Comm: i915_selftest Tainted: G     U            5.3.0-rc1-CI-CI_DRM_6533+ #1
<4> [2515.074726] Hardware name: Google Caroline/Caroline, BIOS MrChromebox 08/27/2018
<4> [2515.074745] RIP: 0010:lock_release+0x182/0x290
<4> [2515.074761] Code: 0e 65 48 8b 3c 25 80 5e 01 00 e8 69 bb ff ff 65 48 8b 04 25 80 5e 01 00 c7 80 44 08 00 00 00 00 00 00 41 55 9d 48 8b 44 24 10 <65> 48 33 04 25 28 00 00 00 0f 85 f2 00 00 00 48 83 c4 18 5b 5d 41
<4> [2515.074772] RSP: 0018:ffffc900001a3a08 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
<4> [2515.074787] RAX: 840ab7c03d287600 RBX: ffff888179ac4fc0 RCX: 000000009db5cb04
<4> [2515.074797] RDX: ffff888179ac5808 RSI: 00000000ed339702 RDI: 00000000ffffffff
<4> [2515.074807] RBP: ffffffff8224a820 R08: ffff888179ac5808 R09: 00000000fffffffe
<4> [2515.074817] R10: 00000000a37d8d85 R11: 00000000fed17f93 R12: ffffffffa02b2be9
<4> [2515.074827] R13: 0000000000000246 R14: 0000000000000002 R15: 0000000000000000
<4> [2515.074841] FS:  00007f47cf09de40(0000) GS:ffff88817ab80000(0000) knlGS:0000000000000000
<4> [2515.074852] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4> [2515.074862] CR2: 000055fd663091f0 CR3: 0000000110c58003 CR4: 00000000003606e0
<4> [2515.074871] Call Trace:
<4> [2515.075262]  i915_gem_object_get_sg+0xf8/0x480 [i915]
<4> [2515.075661]  ? __i915_vma_do_pin+0x5a1/0xd20 [i915]
<4> [2515.076022]  i915_gem_object_get_dma_address+0x1e/0x50 [i915]
<4> [2515.076392]  igt_vma_partial+0x1ce/0x7a0 [i915]
<4> [2515.076832]  __i915_subtests+0xb8/0x220 [i915]
<4> [2515.077203]  ? i915_live_selftests+0x60/0x60 [i915]
<4> [2515.077569]  ? __i915_nop_setup+0x10/0x10 [i915]
<4> [2515.077946]  i915_vma_mock_selftests+0x82/0xf0 [i915]
<4> [2515.078311]  __run_selftests+0x139/0x180 [i915]
<4> [2515.078329]  ? 0xffffffffa0520000
<4> [2515.078714]  i915_mock_selftests+0x27/0x50 [i915]
<4> [2515.078982]  i915_init+0x12/0x73 [i915]
<4> [2515.078999]  ? 0xffffffffa0520000
<4> [2515.079014]  do_one_initcall+0x58/0x2d0
<4> [2515.079032]  ? do_init_module+0x1d/0x1ee
<4> [2515.079054]  ? rcu_read_lock_sched_held+0x6f/0x80
<4> [2515.079071]  ? kmem_cache_alloc_trace+0x29b/0x2c0
<4> [2515.079100]  do_init_module+0x56/0x1ee
<4> [2515.079122]  load_module+0x25bd/0x2a30
<4> [2515.079209]  ? __se_sys_finit_module+0xd3/0xf0
<4> [2515.079223]  __se_sys_finit_module+0xd3/0xf0
<4> [2515.079280]  do_syscall_64+0x55/0x1c0
<4> [2515.079302]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4> [2515.079316] RIP: 0033:0x7f47ce756839
<4> [2515.079331] Code: 00 f3 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 1f f6 2c 00 f7 d8 64 89 01 48
<4> [2515.079343] RSP: 002b:00007fff0c82fd48 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
<4> [2515.079357] RAX: ffffffffffffffda RBX: 000055eafea1fd90 RCX: 00007f47ce756839
<4> [2515.079367] RDX: 0000000000000000 RSI: 000055eafea2a4c0 RDI: 0000000000000006
<4> [2515.079377] RBP: 000055eafea2a4c0 R08: 0000000000000004 R09: 0000000000000000
<4> [2515.079387] R10: 00007fff0c82ff90 R11: 0000000000000246 R12: 0000000000000000
<4> [2515.079397] R13: 000055eafea1c000 R14: 0000000000000020 R15: 0000000000000042
<6> [2518.941271] [IGT] i915_selftest: exiting, ret=0
Comment 2 Chris Wilson 2019-07-23 09:41:48 UTC 
It escapes eventually, so I think it just got much slower.
Comment 3 Chris Wilson 2019-07-23 12:31:47 UTC 
commit d8bf0e7627e6e887bd0ed3707216e0e69ec95710 (HEAD -> drm-intel-next-queued, drm-intel/for-linux-next, drm-intel/drm-intel-next-queued)
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Tue Jul 23 10:58:00 2019 +0100

    drm/i915/selftests: Let igt_vma_partial et al breathe
    
    Give the scheduler a chance to breathe by calling cond_resched() as some
    of the loops may take some time on slower machines, and so catch the
    attention of the watchdogs.
    
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=111196
    Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
    Cc: Matthew Auld <matthew.william.auld@gmail.com>
    Reviewed-by: Matthew Auld <matthew.william.auld@gmail.com>
    Link: https://patchwork.freedesktop.org/patch/msgid/20190723095800.2820-1-chris@chris-wilson.co.uk
Comment 4 Lakshmi 2019-09-26 19:56:45 UTC 
This issue was 100% reproducible till CI_DRM_6539_full (2 months old). Later no new occurrence, Closing and archiving the bug.
Comment 5 CI Bug Log 2019-09-26 19:57:01 UTC 
The CI Bug Log issue associated to this bug has been archived.

New failures matching the above filters will not be associated to this bug anymore.

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