[CI] drm/i915/tgl: Magic interrupt shadow to relieve some random lockups

[CI] drm/i915/tgl: Magic interrupt shadow to relieve some random lockups

[Chris Wilson]

My current theory is that this masks interrupt delivery to the local CPU
during a critical phase. Purely papering over the symptoms with a delay
plucked out of thin air from testing on tgl1-gem, refined slightly by
just waiting for the next ack (though technically the next CS event may
not be the corresponding event for this submit, but an intermediate
completion).

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Andi Shyti <andi.shyti@intel.com>
Acked-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
---
 drivers/gpu/drm/i915/gt/intel_lrc.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
index fa385218ce92..6b995017571d 100644
--- a/drivers/gpu/drm/i915/gt/intel_lrc.c
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
@@ -1186,6 +1186,28 @@ static void execlists_submit_ports(struct intel_engine_cs *engine)
 	/* we need to manually load the submit queue */
 	if (execlists->ctrl_reg)
 		writel(EL_CTRL_LOAD, execlists->ctrl_reg);
+
+	/*
+	 * Now this is evil magic.
+	 *
+	 * Adding the same udelay() to process_csb before we clear
+	 * execlists->pending (that is after we receive the HW ack for this
+	 * submit and before we can submit again) does not relieve the symptoms
+	 * (machine lockup). So is the active difference here the wait under
+	 * the irq-off spinlock? That gives more credance to the theory that
+	 * the issue is interrupt delivery. Also note that we still rely on
+	 * disabling RPS, again that seems like an issue with simultaneous
+	 * GT interrupts being delivered to the same CPU.
+	 */
+	if (IS_TIGERLAKE(engine->i915)) {
+		u64 start = local_clock();
+
+		udelay(250);
+
+		while (READ_ONCE(*execlists->pending) && /* wait for ack */
+		       (local_clock() - start) >> 22 == 0) /* ~4ms timeout */
+			cpu_relax();
+	}
 }
 
 static bool ctx_single_port_submission(const struct intel_context *ce)
-- 
2.23.0

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✗ Fi.CI.CHECKPATCH: warning for drm/i915/tgl: Magic interrupt shadow to relieve some random lockups

[Patchwork]

== Series Details ==

Series: drm/i915/tgl: Magic interrupt shadow to relieve some random lockups
URL   : https://patchwork.freedesktop.org/series/67416/
State : warning

== Summary ==

$ dim checkpatch origin/drm-tip
781c7510e4df drm/i915/tgl: Magic interrupt shadow to relieve some random lockups
-:43: CHECK:USLEEP_RANGE: usleep_range is preferred over udelay; see Documentation/timers/timers-howto.rst
#43: FILE: drivers/gpu/drm/i915/gt/intel_lrc.c:1205:
+		udelay(250);

total: 0 errors, 0 warnings, 1 checks, 28 lines checked

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✓ Fi.CI.BAT: success for drm/i915/tgl: Magic interrupt shadow to relieve some random lockups

[Patchwork]

== Series Details ==

Series: drm/i915/tgl: Magic interrupt shadow to relieve some random lockups
URL   : https://patchwork.freedesktop.org/series/67416/
State : success

== Summary ==

CI Bug Log - changes from CI_DRM_6976 -> Patchwork_14592
====================================================

Summary
-------

  **SUCCESS**

  No regressions found.

  External URL: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/index.html

Possible new issues
-------------------

  Here are the unknown changes that may have been introduced in Patchwork_14592:

### IGT changes ###

#### Suppressed ####

  The following results come from untrusted machines, tests, or statuses.
  They do not affect the overall result.

  * igt@i915_selftest@live_execlists:
    - {fi-tgl-u2}:        NOTRUN -> [DMESG-FAIL][1] +1 similar issue
   [1]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/fi-tgl-u2/igt@i915_selftest@live_execlists.html

  
Known issues
------------

  Here are the changes found in Patchwork_14592 that come from known issues:

### IGT changes ###

#### Issues hit ####

  * igt@gem_exec_suspend@basic-s4-devices:
    - fi-blb-e6850:       [PASS][2] -> [INCOMPLETE][3] ([fdo#107718])
   [2]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/fi-blb-e6850/igt@gem_exec_suspend@basic-s4-devices.html
   [3]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/fi-blb-e6850/igt@gem_exec_suspend@basic-s4-devices.html

  * igt@i915_getparams_basic@basic-eu-total:
    - fi-icl-u3:          [PASS][4] -> [DMESG-WARN][5] ([fdo#107724])
   [4]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/fi-icl-u3/igt@i915_getparams_basic@basic-eu-total.html
   [5]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/fi-icl-u3/igt@i915_getparams_basic@basic-eu-total.html

  * igt@kms_frontbuffer_tracking@basic:
    - fi-hsw-peppy:       [PASS][6] -> [DMESG-WARN][7] ([fdo#102614])
   [6]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/fi-hsw-peppy/igt@kms_frontbuffer_tracking@basic.html
   [7]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/fi-hsw-peppy/igt@kms_frontbuffer_tracking@basic.html

  
#### Possible fixes ####

  * {igt@i915_selftest@live_gt_timelines}:
    - {fi-tgl-u2}:        [INCOMPLETE][8] ([fdo#111831]) -> [PASS][9]
   [8]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/fi-tgl-u2/igt@i915_selftest@live_gt_timelines.html
   [9]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/fi-tgl-u2/igt@i915_selftest@live_gt_timelines.html

  * igt@kms_flip@basic-flip-vs-dpms:
    - fi-icl-u3:          [DMESG-WARN][10] ([fdo#107724]) -> [PASS][11] +4 similar issues
   [10]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/fi-icl-u3/igt@kms_flip@basic-flip-vs-dpms.html
   [11]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/fi-icl-u3/igt@kms_flip@basic-flip-vs-dpms.html

  * igt@kms_frontbuffer_tracking@basic:
    - fi-icl-u3:          [FAIL][12] ([fdo#103167]) -> [PASS][13]
   [12]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/fi-icl-u3/igt@kms_frontbuffer_tracking@basic.html
   [13]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/fi-icl-u3/igt@kms_frontbuffer_tracking@basic.html

  
  {name}: This element is suppressed. This means it is ignored when computing
          the status of the difference (SUCCESS, WARNING, or FAILURE).

  [fdo#102614]: https://bugs.freedesktop.org/show_bug.cgi?id=102614
  [fdo#103167]: https://bugs.freedesktop.org/show_bug.cgi?id=103167
  [fdo#105763]: https://bugs.freedesktop.org/show_bug.cgi?id=105763
  [fdo#107718]: https://bugs.freedesktop.org/show_bug.cgi?id=107718
  [fdo#107724]: https://bugs.freedesktop.org/show_bug.cgi?id=107724
  [fdo#111831]: https://bugs.freedesktop.org/show_bug.cgi?id=111831


Participating hosts (53 -> 46)
------------------------------

  Missing    (7): fi-ilk-m540 fi-hsw-4200u fi-byt-squawks fi-bsw-cyan fi-icl-y fi-byt-clapper fi-bdw-samus 


Build changes
-------------

  * CI: CI-20190529 -> None
  * Linux: CI_DRM_6976 -> Patchwork_14592

  CI-20190529: 20190529
  CI_DRM_6976: c698979e8207a4eb568b533f05b9d4580fd5d007 @ git://anongit.freedesktop.org/gfx-ci/linux
  IGT_5208: c0131b4f132acf287d9d05b0f5078003d3159e1c @ git://anongit.freedesktop.org/xorg/app/intel-gpu-tools
  Patchwork_14592: 781c7510e4dfb0f6815cee70e31b0888dd1cfe22 @ git://anongit.freedesktop.org/gfx-ci/linux


== Linux commits ==

781c7510e4df drm/i915/tgl: Magic interrupt shadow to relieve some random lockups

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/index.html
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✗ Fi.CI.IGT: failure for drm/i915/tgl: Magic interrupt shadow to relieve some random lockups

[Patchwork]

== Series Details ==

Series: drm/i915/tgl: Magic interrupt shadow to relieve some random lockups
URL   : https://patchwork.freedesktop.org/series/67416/
State : failure

== Summary ==

CI Bug Log - changes from CI_DRM_6976_full -> Patchwork_14592_full
====================================================

Summary
-------

  **FAILURE**

  Serious unknown changes coming with Patchwork_14592_full absolutely need to be
  verified manually.
  
  If you think the reported changes have nothing to do with the changes
  introduced in Patchwork_14592_full, please notify your bug team to allow them
  to document this new failure mode, which will reduce false positives in CI.

  

Possible new issues
-------------------

  Here are the unknown changes that may have been introduced in Patchwork_14592_full:

### IGT changes ###

#### Possible regressions ####

  * igt@gem_ctx_isolation@rcs0-s3:
    - shard-iclb:         [PASS][1] -> [DMESG-WARN][2]
   [1]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/shard-iclb1/igt@gem_ctx_isolation@rcs0-s3.html
   [2]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/shard-iclb1/igt@gem_ctx_isolation@rcs0-s3.html

  
Known issues
------------

  Here are the changes found in Patchwork_14592_full that come from known issues:

### IGT changes ###

#### Issues hit ####

  * igt@gem_ctx_isolation@bcs0-s3:
    - shard-apl:          [PASS][3] -> [DMESG-WARN][4] ([fdo#108566]) +3 similar issues
   [3]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/shard-apl7/igt@gem_ctx_isolation@bcs0-s3.html
   [4]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/shard-apl7/igt@gem_ctx_isolation@bcs0-s3.html

  * igt@gem_exec_async@concurrent-writes-bsd:
    - shard-iclb:         [PASS][5] -> [SKIP][6] ([fdo#111325]) +3 similar issues
   [5]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/shard-iclb3/igt@gem_exec_async@concurrent-writes-bsd.html
   [6]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/shard-iclb1/igt@gem_exec_async@concurrent-writes-bsd.html

  * igt@i915_pm_rc6_residency@rc6-accuracy:
    - shard-snb:          [PASS][7] -> [SKIP][8] ([fdo#109271])
   [7]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/shard-snb5/igt@i915_pm_rc6_residency@rc6-accuracy.html
   [8]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/shard-snb5/igt@i915_pm_rc6_residency@rc6-accuracy.html

  * igt@kms_cursor_crc@pipe-a-cursor-64x64-sliding:
    - shard-iclb:         [PASS][9] -> [INCOMPLETE][10] ([fdo#107713]) +1 similar issue
   [9]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/shard-iclb2/igt@kms_cursor_crc@pipe-a-cursor-64x64-sliding.html
   [10]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/shard-iclb7/igt@kms_cursor_crc@pipe-a-cursor-64x64-sliding.html

  * igt@kms_cursor_crc@pipe-b-cursor-128x128-onscreen:
    - shard-skl:          [PASS][11] -> [FAIL][12] ([fdo#103232])
   [11]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/shard-skl4/igt@kms_cursor_crc@pipe-b-cursor-128x128-onscreen.html
   [12]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/shard-skl7/igt@kms_cursor_crc@pipe-b-cursor-128x128-onscreen.html

  * igt@kms_flip@flip-vs-expired-vblank:
    - shard-skl:          [PASS][13] -> [FAIL][14] ([fdo#105363]) +1 similar issue
   [13]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/shard-skl6/igt@kms_flip@flip-vs-expired-vblank.html
   [14]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/shard-skl1/igt@kms_flip@flip-vs-expired-vblank.html

  * igt@kms_flip@flip-vs-expired-vblank-interruptible:
    - shard-glk:          [PASS][15] -> [FAIL][16] ([fdo#105363])
   [15]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/shard-glk9/igt@kms_flip@flip-vs-expired-vblank-interruptible.html
   [16]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/shard-glk1/igt@kms_flip@flip-vs-expired-vblank-interruptible.html

  * igt@kms_frontbuffer_tracking@fbc-1p-primscrn-shrfb-msflip-blt:
    - shard-iclb:         [PASS][17] -> [FAIL][18] ([fdo#103167]) +3 similar issues
   [17]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/shard-iclb7/igt@kms_frontbuffer_tracking@fbc-1p-primscrn-shrfb-msflip-blt.html
   [18]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/shard-iclb5/igt@kms_frontbuffer_tracking@fbc-1p-primscrn-shrfb-msflip-blt.html

  * igt@kms_pipe_crc_basic@nonblocking-crc-pipe-b-frame-sequence:
    - shard-skl:          [PASS][19] -> [FAIL][20] ([fdo#103191])
   [19]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/shard-skl4/igt@kms_pipe_crc_basic@nonblocking-crc-pipe-b-frame-sequence.html
   [20]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/shard-skl7/igt@kms_pipe_crc_basic@nonblocking-crc-pipe-b-frame-sequence.html

  * igt@kms_plane_alpha_blend@pipe-b-constant-alpha-min:
    - shard-skl:          [PASS][21] -> [FAIL][22] ([fdo#108145])
   [21]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/shard-skl4/igt@kms_plane_alpha_blend@pipe-b-constant-alpha-min.html
   [22]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/shard-skl7/igt@kms_plane_alpha_blend@pipe-b-constant-alpha-min.html

  * igt@kms_psr@psr2_sprite_mmap_gtt:
    - shard-iclb:         [PASS][23] -> [SKIP][24] ([fdo#109441]) +1 similar issue
   [23]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/shard-iclb2/igt@kms_psr@psr2_sprite_mmap_gtt.html
   [24]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/shard-iclb8/igt@kms_psr@psr2_sprite_mmap_gtt.html

  * igt@kms_setmode@basic:
    - shard-hsw:          [PASS][25] -> [FAIL][26] ([fdo#99912])
   [25]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/shard-hsw6/igt@kms_setmode@basic.html
   [26]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/shard-hsw1/igt@kms_setmode@basic.html

  * igt@perf@blocking:
    - shard-skl:          [PASS][27] -> [FAIL][28] ([fdo#110728])
   [27]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/shard-skl8/igt@perf@blocking.html
   [28]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/shard-skl7/igt@perf@blocking.html

  * igt@prime_busy@after-bsd2:
    - shard-iclb:         [PASS][29] -> [SKIP][30] ([fdo#109276]) +9 similar issues
   [29]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/shard-iclb2/igt@prime_busy@after-bsd2.html
   [30]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/shard-iclb8/igt@prime_busy@after-bsd2.html

  
#### Possible fixes ####

  * igt@gem_workarounds@suspend-resume-context:
    - shard-apl:          [DMESG-WARN][31] ([fdo#108566]) -> [PASS][32] +3 similar issues
   [31]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/shard-apl2/igt@gem_workarounds@suspend-resume-context.html
   [32]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/shard-apl8/igt@gem_workarounds@suspend-resume-context.html

  * {igt@i915_pm_dc@dc5-dpms}:
    - shard-iclb:         [FAIL][33] ([fdo#111795 ]) -> [PASS][34]
   [33]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/shard-iclb3/igt@i915_pm_dc@dc5-dpms.html
   [34]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/shard-iclb6/igt@i915_pm_dc@dc5-dpms.html

  * igt@kms_draw_crc@draw-method-xrgb2101010-mmap-cpu-untiled:
    - shard-skl:          [FAIL][35] ([fdo#103184] / [fdo#103232]) -> [PASS][36]
   [35]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/shard-skl8/igt@kms_draw_crc@draw-method-xrgb2101010-mmap-cpu-untiled.html
   [36]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/shard-skl1/igt@kms_draw_crc@draw-method-xrgb2101010-mmap-cpu-untiled.html

  * igt@kms_flip@flip-vs-suspend:
    - shard-skl:          [INCOMPLETE][37] ([fdo#109507]) -> [PASS][38]
   [37]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/shard-skl8/igt@kms_flip@flip-vs-suspend.html
   [38]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/shard-skl9/igt@kms_flip@flip-vs-suspend.html
    - shard-hsw:          [INCOMPLETE][39] ([fdo#103540]) -> [PASS][40]
   [39]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/shard-hsw4/igt@kms_flip@flip-vs-suspend.html
   [40]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/shard-hsw4/igt@kms_flip@flip-vs-suspend.html

  * igt@kms_frontbuffer_tracking@fbc-1p-offscren-pri-shrfb-draw-pwrite:
    - shard-iclb:         [FAIL][41] ([fdo#103167]) -> [PASS][42] +2 similar issues
   [41]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/shard-iclb6/igt@kms_frontbuffer_tracking@fbc-1p-offscren-pri-shrfb-draw-pwrite.html
   [42]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/shard-iclb6/igt@kms_frontbuffer_tracking@fbc-1p-offscren-pri-shrfb-draw-pwrite.html

  * igt@kms_plane@plane-panning-bottom-right-pipe-a-planes:
    - shard-skl:          [FAIL][43] ([fdo#103166]) -> [PASS][44]
   [43]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/shard-skl8/igt@kms_plane@plane-panning-bottom-right-pipe-a-planes.html
   [44]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/shard-skl1/igt@kms_plane@plane-panning-bottom-right-pipe-a-planes.html

  * igt@kms_plane_lowres@pipe-a-tiling-x:
    - shard-iclb:         [FAIL][45] ([fdo#103166]) -> [PASS][46]
   [45]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/shard-iclb7/igt@kms_plane_lowres@pipe-a-tiling-x.html
   [46]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/shard-iclb8/igt@kms_plane_lowres@pipe-a-tiling-x.html

  * igt@kms_psr2_su@page_flip:
    - shard-iclb:         [SKIP][47] ([fdo#109642] / [fdo#111068]) -> [PASS][48]
   [47]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/shard-iclb1/igt@kms_psr2_su@page_flip.html
   [48]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/shard-iclb2/igt@kms_psr2_su@page_flip.html

  * igt@kms_vblank@pipe-c-ts-continuation-dpms-suspend:
    - shard-kbl:          [INCOMPLETE][49] ([fdo#103665]) -> [PASS][50]
   [49]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/shard-kbl2/igt@kms_vblank@pipe-c-ts-continuation-dpms-suspend.html
   [50]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/shard-kbl4/igt@kms_vblank@pipe-c-ts-continuation-dpms-suspend.html

  * igt@prime_busy@hang-bsd2:
    - shard-iclb:         [SKIP][51] ([fdo#109276]) -> [PASS][52] +11 similar issues
   [51]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/shard-iclb6/igt@prime_busy@hang-bsd2.html
   [52]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/shard-iclb4/igt@prime_busy@hang-bsd2.html

  
#### Warnings ####

  * igt@gem_mocs_settings@mocs-isolation-bsd2:
    - shard-iclb:         [SKIP][53] ([fdo#109276]) -> [FAIL][54] ([fdo#111330])
   [53]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6976/shard-iclb6/igt@gem_mocs_settings@mocs-isolation-bsd2.html
   [54]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/shard-iclb1/igt@gem_mocs_settings@mocs-isolation-bsd2.html

  
  {name}: This element is suppressed. This means it is ignored when computing
          the status of the difference (SUCCESS, WARNING, or FAILURE).

  [fdo#103166]: https://bugs.freedesktop.org/show_bug.cgi?id=103166
  [fdo#103167]: https://bugs.freedesktop.org/show_bug.cgi?id=103167
  [fdo#103184]: https://bugs.freedesktop.org/show_bug.cgi?id=103184
  [fdo#103191]: https://bugs.freedesktop.org/show_bug.cgi?id=103191
  [fdo#103232]: https://bugs.freedesktop.org/show_bug.cgi?id=103232
  [fdo#103540]: https://bugs.freedesktop.org/show_bug.cgi?id=103540
  [fdo#103665]: https://bugs.freedesktop.org/show_bug.cgi?id=103665
  [fdo#105363]: https://bugs.freedesktop.org/show_bug.cgi?id=105363
  [fdo#107713]: https://bugs.freedesktop.org/show_bug.cgi?id=107713
  [fdo#108145]: https://bugs.freedesktop.org/show_bug.cgi?id=108145
  [fdo#108566]: https://bugs.freedesktop.org/show_bug.cgi?id=108566
  [fdo#109271]: https://bugs.freedesktop.org/show_bug.cgi?id=109271
  [fdo#109276]: https://bugs.freedesktop.org/show_bug.cgi?id=109276
  [fdo#109441]: https://bugs.freedesktop.org/show_bug.cgi?id=109441
  [fdo#109507]: https://bugs.freedesktop.org/show_bug.cgi?id=109507
  [fdo#109642]: https://bugs.freedesktop.org/show_bug.cgi?id=109642
  [fdo#110728]: https://bugs.freedesktop.org/show_bug.cgi?id=110728
  [fdo#111068]: https://bugs.freedesktop.org/show_bug.cgi?id=111068
  [fdo#111325]: https://bugs.freedesktop.org/show_bug.cgi?id=111325
  [fdo#111330]: https://bugs.freedesktop.org/show_bug.cgi?id=111330
  [fdo#111781]: https://bugs.freedesktop.org/show_bug.cgi?id=111781
  [fdo#111795 ]: https://bugs.freedesktop.org/show_bug.cgi?id=111795 
  [fdo#99912]: https://bugs.freedesktop.org/show_bug.cgi?id=99912


Participating hosts (16 -> 10)
------------------------------

  Missing    (6): shard-tglb1 shard-tglb2 shard-tglb3 shard-tglb4 shard-tglb5 shard-tglb6 


Build changes
-------------

  * CI: CI-20190529 -> None
  * Linux: CI_DRM_6976 -> Patchwork_14592

  CI-20190529: 20190529
  CI_DRM_6976: c698979e8207a4eb568b533f05b9d4580fd5d007 @ git://anongit.freedesktop.org/gfx-ci/linux
  IGT_5208: c0131b4f132acf287d9d05b0f5078003d3159e1c @ git://anongit.freedesktop.org/xorg/app/intel-gpu-tools
  Patchwork_14592: 781c7510e4dfb0f6815cee70e31b0888dd1cfe22 @ git://anongit.freedesktop.org/gfx-ci/linux
  piglit_4509: fdc5a4ca11124ab8413c7988896eec4c97336694 @ git://anongit.freedesktop.org/piglit

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14592/
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