[Intel-gfx] [CI] drm/i915/gem: Reduce context termination list iteration guard to RCU

[Intel-gfx] [CI] drm/i915/gem: Reduce context termination list iteration guard to RCU

[Chris Wilson]

As we now protect the timeline list using RCU, we can drop the
timeline->mutex for guarding the list iteration during context close, as
we are searching for an inflight request. Any new request will see the
context is banned and not be submitted. In doing so, pull the checks for
a concurrent submission of the request (notably the
i915_request_completed()) under the engine spinlock, to fully serialise
with __i915_request_submit()). That is in the case of preempt-to-busy
where the request may be completed during the __i915_request_submit(),
we need to be careful that we sample the request status after
serialising so that we don't miss the request the engine is actually
submitting.

Fixes: 4a3174152147 ("drm/i915/gem: Refine occupancy test in kill_context()")
References: d22d2d073ef8 ("drm/i915: Protect i915_request_await_start from early waits") # rcu protection of timeline->requests
References: https://gitlab.freedesktop.org/drm/intel/-/issues/1622
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/gem/i915_gem_context.c | 32 ++++++++++++---------
 1 file changed, 19 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c
index d8cccbab7a51..db893f6c516b 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c
@@ -439,29 +439,36 @@ static bool __cancel_engine(struct intel_engine_cs *engine)
 	return __reset_engine(engine);
 }
 
-static struct intel_engine_cs *__active_engine(struct i915_request *rq)
+static bool
+__active_engine(struct i915_request *rq, struct intel_engine_cs **active)
 {
 	struct intel_engine_cs *engine, *locked;
+	bool ret = false;
 
 	/*
 	 * Serialise with __i915_request_submit() so that it sees
 	 * is-banned?, or we know the request is already inflight.
+	 *
+	 * Note that rq->engine is unstable, and so we double
+	 * check that we have acquired the lock on the final engine.
 	 */
 	locked = READ_ONCE(rq->engine);
 	spin_lock_irq(&locked->active.lock);
 	while (unlikely(locked != (engine = READ_ONCE(rq->engine)))) {
 		spin_unlock(&locked->active.lock);
-		spin_lock(&engine->active.lock);
 		locked = engine;
+		spin_lock(&locked->active.lock);
 	}
 
-	engine = NULL;
-	if (i915_request_is_active(rq) && rq->fence.error != -EIO)
-		engine = rq->engine;
+	if (!i915_request_completed(rq)) {
+		if (i915_request_is_active(rq) && rq->fence.error != -EIO)
+			*active = locked;
+		ret = true;
+	}
 
 	spin_unlock_irq(&locked->active.lock);
 
-	return engine;
+	return ret;
 }
 
 static struct intel_engine_cs *active_engine(struct intel_context *ce)
@@ -472,17 +479,16 @@ static struct intel_engine_cs *active_engine(struct intel_context *ce)
 	if (!ce->timeline)
 		return NULL;
 
-	mutex_lock(&ce->timeline->mutex);
-	list_for_each_entry_reverse(rq, &ce->timeline->requests, link) {
-		if (i915_request_completed(rq))
-			break;
+	rcu_read_lock();
+	list_for_each_entry_rcu(rq, &ce->timeline->requests, link) {
+		if (i915_request_is_active(rq) && i915_request_completed(rq))
+			continue;
 
 		/* Check with the backend if the request is inflight */
-		engine = __active_engine(rq);
-		if (engine)
+		if (__active_engine(rq, &engine))
 			break;
 	}
-	mutex_unlock(&ce->timeline->mutex);
+	rcu_read_unlock();
 
 	return engine;
 }
-- 
2.20.1

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Re: [Intel-gfx] [CI] drm/i915/gem: Reduce context termination list iteration guard to RCU

[Chris Wilson]

Quoting Chris Wilson (2020-08-06 11:59:54)
> As we now protect the timeline list using RCU, we can drop the
> timeline->mutex for guarding the list iteration during context close, as
> we are searching for an inflight request. Any new request will see the
> context is banned and not be submitted. In doing so, pull the checks for
> a concurrent submission of the request (notably the
> i915_request_completed()) under the engine spinlock, to fully serialise
> with __i915_request_submit()). That is in the case of preempt-to-busy
> where the request may be completed during the __i915_request_submit(),
> we need to be careful that we sample the request status after
> serialising so that we don't miss the request the engine is actually
> submitting.
> 
> Fixes: 4a3174152147 ("drm/i915/gem: Refine occupancy test in kill_context()")
> References: d22d2d073ef8 ("drm/i915: Protect i915_request_await_start from early waits") # rcu protection of timeline->requests
> References: https://gitlab.freedesktop.org/drm/intel/-/issues/1622
Also
References: https://gitlab.freedesktop.org/drm/intel/-/issues/2158
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
-Chris
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[Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for drm/i915/gem: Reduce context termination list iteration guard to RCU

[Patchwork]

== Series Details ==

Series: drm/i915/gem: Reduce context termination list iteration guard to RCU
URL   : https://patchwork.freedesktop.org/series/80337/
State : warning

== Summary ==

$ dim checkpatch origin/drm-tip
41b2ea22bde1 drm/i915/gem: Reduce context termination list iteration guard to RCU
-:20: WARNING:COMMIT_LOG_LONG_LINE: Possible unwrapped commit description (prefer a maximum 75 chars per line)
#20: 
References: d22d2d073ef8 ("drm/i915: Protect i915_request_await_start from early waits") # rcu protection of timeline->requests

-:20: ERROR:GIT_COMMIT_ID: Please use git commit description style 'commit <12+ chars of sha1> ("<title line>")' - ie: 'commit d22d2d073ef8 ("drm/i915: Protect i915_request_await_start from early waits")'
#20: 
References: d22d2d073ef8 ("drm/i915: Protect i915_request_await_start from early waits") # rcu protection of timeline->requests

total: 1 errors, 1 warnings, 0 checks, 65 lines checked


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[Intel-gfx] ✗ Fi.CI.SPARSE: warning for drm/i915/gem: Reduce context termination list iteration guard to RCU

[Patchwork]

== Series Details ==

Series: drm/i915/gem: Reduce context termination list iteration guard to RCU
URL   : https://patchwork.freedesktop.org/series/80337/
State : warning

== Summary ==

$ dim sparse --fast origin/drm-tip
Sparse version: v0.6.0
Fast mode used, each commit won't be checked separately.


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[Intel-gfx] ✓ Fi.CI.BAT: success for drm/i915/gem: Reduce context termination list iteration guard to RCU

[Patchwork]

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== Series Details ==

Series: drm/i915/gem: Reduce context termination list iteration guard to RCU
URL   : https://patchwork.freedesktop.org/series/80337/
State : success

== Summary ==

CI Bug Log - changes from CI_DRM_8848 -> Patchwork_18313
====================================================

Summary
-------

  **SUCCESS**

  No regressions found.

  External URL: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/index.html

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

  Here are the changes found in Patchwork_18313 that come from known issues:

### IGT changes ###

#### Issues hit ####

  * igt@i915_selftest@live@gt_lrc:
    - fi-tgl-u2:          [PASS][1] -> [DMESG-FAIL][2] ([i915#1233])
   [1]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/fi-tgl-u2/igt@i915_selftest@live@gt_lrc.html
   [2]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/fi-tgl-u2/igt@i915_selftest@live@gt_lrc.html

  * igt@kms_cursor_legacy@basic-busy-flip-before-cursor-atomic:
    - fi-bsw-kefka:       [PASS][3] -> [DMESG-WARN][4] ([i915#1982])
   [3]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/fi-bsw-kefka/igt@kms_cursor_legacy@basic-busy-flip-before-cursor-atomic.html
   [4]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/fi-bsw-kefka/igt@kms_cursor_legacy@basic-busy-flip-before-cursor-atomic.html

  * igt@kms_cursor_legacy@basic-busy-flip-before-cursor-legacy:
    - fi-icl-u2:          [PASS][5] -> [DMESG-WARN][6] ([i915#1982]) +1 similar issue
   [5]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/fi-icl-u2/igt@kms_cursor_legacy@basic-busy-flip-before-cursor-legacy.html
   [6]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/fi-icl-u2/igt@kms_cursor_legacy@basic-busy-flip-before-cursor-legacy.html

  
#### Possible fixes ####

  * igt@i915_module_load@reload:
    - fi-byt-j1900:       [DMESG-WARN][7] ([i915#1982]) -> [PASS][8]
   [7]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/fi-byt-j1900/igt@i915_module_load@reload.html
   [8]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/fi-byt-j1900/igt@i915_module_load@reload.html
    - fi-tgl-u2:          [DMESG-WARN][9] ([i915#1982]) -> [PASS][10]
   [9]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/fi-tgl-u2/igt@i915_module_load@reload.html
   [10]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/fi-tgl-u2/igt@i915_module_load@reload.html

  
#### Warnings ####

  * igt@kms_flip@basic-flip-vs-dpms@a-dp1:
    - fi-kbl-x1275:       [DMESG-WARN][11] ([i915#62] / [i915#92]) -> [DMESG-WARN][12] ([i915#62] / [i915#92] / [i915#95])
   [11]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/fi-kbl-x1275/igt@kms_flip@basic-flip-vs-dpms@a-dp1.html
   [12]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/fi-kbl-x1275/igt@kms_flip@basic-flip-vs-dpms@a-dp1.html

  * igt@kms_force_connector_basic@force-edid:
    - fi-kbl-x1275:       [DMESG-WARN][13] ([i915#62] / [i915#92] / [i915#95]) -> [DMESG-WARN][14] ([i915#62] / [i915#92]) +3 similar issues
   [13]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/fi-kbl-x1275/igt@kms_force_connector_basic@force-edid.html
   [14]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/fi-kbl-x1275/igt@kms_force_connector_basic@force-edid.html

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

  [i915#1233]: https://gitlab.freedesktop.org/drm/intel/issues/1233
  [i915#1982]: https://gitlab.freedesktop.org/drm/intel/issues/1982
  [i915#2100]: https://gitlab.freedesktop.org/drm/intel/issues/2100
  [i915#62]: https://gitlab.freedesktop.org/drm/intel/issues/62
  [i915#92]: https://gitlab.freedesktop.org/drm/intel/issues/92
  [i915#95]: https://gitlab.freedesktop.org/drm/intel/issues/95


Participating hosts (44 -> 38)
------------------------------

  Additional (1): fi-tgl-y 
  Missing    (7): fi-ilk-m540 fi-hsw-4200u fi-byt-squawks fi-bsw-cyan fi-ctg-p8600 fi-byt-clapper fi-bdw-samus 


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

  * Linux: CI_DRM_8848 -> Patchwork_18313

  CI-20190529: 20190529
  CI_DRM_8848: f39035176cb854c6d620af7614a60a485ee26818 @ git://anongit.freedesktop.org/gfx-ci/linux
  IGT_5760: 53d2ddd2f5f7beb98a996d7f2c3976c87d4da01f @ git://anongit.freedesktop.org/xorg/app/intel-gpu-tools
  Patchwork_18313: 41b2ea22bde1a6363c2a9955b323c283b76c2021 @ git://anongit.freedesktop.org/gfx-ci/linux


== Linux commits ==

41b2ea22bde1 drm/i915/gem: Reduce context termination list iteration guard to RCU

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/index.html

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[Intel-gfx] ✓ Fi.CI.IGT: success for drm/i915/gem: Reduce context termination list iteration guard to RCU

[Patchwork]

[-- Attachment #1.1: Type: text/plain, Size: 13677 bytes --]

== Series Details ==

Series: drm/i915/gem: Reduce context termination list iteration guard to RCU
URL   : https://patchwork.freedesktop.org/series/80337/
State : success

== Summary ==

CI Bug Log - changes from CI_DRM_8848_full -> Patchwork_18313_full
====================================================

Summary
-------

  **SUCCESS**

  No regressions found.

  

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

  Here are the changes found in Patchwork_18313_full that come from known issues:

### IGT changes ###

#### Issues hit ####

  * igt@gem_ctx_engines@execute-allforone:
    - shard-snb:          [PASS][1] -> [TIMEOUT][2] ([i915#1958]) +2 similar issues
   [1]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/shard-snb6/igt@gem_ctx_engines@execute-allforone.html
   [2]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/shard-snb4/igt@gem_ctx_engines@execute-allforone.html

  * igt@gem_exec_whisper@basic-forked:
    - shard-glk:          [PASS][3] -> [DMESG-WARN][4] ([i915#118] / [i915#95])
   [3]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/shard-glk4/igt@gem_exec_whisper@basic-forked.html
   [4]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/shard-glk4/igt@gem_exec_whisper@basic-forked.html

  * igt@i915_selftest@mock@contexts:
    - shard-skl:          [PASS][5] -> [INCOMPLETE][6] ([i915#198]) +1 similar issue
   [5]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/shard-skl2/igt@i915_selftest@mock@contexts.html
   [6]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/shard-skl10/igt@i915_selftest@mock@contexts.html
    - shard-apl:          [PASS][7] -> [INCOMPLETE][8] ([i915#1635])
   [7]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/shard-apl2/igt@i915_selftest@mock@contexts.html
   [8]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/shard-apl7/igt@i915_selftest@mock@contexts.html

  * igt@kms_big_fb@x-tiled-64bpp-rotate-180:
    - shard-glk:          [PASS][9] -> [DMESG-FAIL][10] ([i915#118] / [i915#95]) +1 similar issue
   [9]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/shard-glk7/igt@kms_big_fb@x-tiled-64bpp-rotate-180.html
   [10]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/shard-glk8/igt@kms_big_fb@x-tiled-64bpp-rotate-180.html

  * igt@kms_cursor_edge_walk@pipe-b-256x256-bottom-edge:
    - shard-snb:          [PASS][11] -> [SKIP][12] ([fdo#109271])
   [11]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/shard-snb4/igt@kms_cursor_edge_walk@pipe-b-256x256-bottom-edge.html
   [12]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/shard-snb2/igt@kms_cursor_edge_walk@pipe-b-256x256-bottom-edge.html

  * igt@kms_cursor_edge_walk@pipe-b-256x256-left-edge:
    - shard-skl:          [PASS][13] -> [DMESG-WARN][14] ([i915#1982]) +10 similar issues
   [13]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/shard-skl1/igt@kms_cursor_edge_walk@pipe-b-256x256-left-edge.html
   [14]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/shard-skl1/igt@kms_cursor_edge_walk@pipe-b-256x256-left-edge.html

  * igt@kms_cursor_edge_walk@pipe-b-64x64-top-edge:
    - shard-glk:          [PASS][15] -> [DMESG-WARN][16] ([i915#1982])
   [15]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/shard-glk7/igt@kms_cursor_edge_walk@pipe-b-64x64-top-edge.html
   [16]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/shard-glk2/igt@kms_cursor_edge_walk@pipe-b-64x64-top-edge.html

  * igt@kms_draw_crc@draw-method-rgb565-mmap-wc-ytiled:
    - shard-apl:          [PASS][17] -> [DMESG-WARN][18] ([i915#1635] / [i915#1982])
   [17]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/shard-apl7/igt@kms_draw_crc@draw-method-rgb565-mmap-wc-ytiled.html
   [18]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/shard-apl6/igt@kms_draw_crc@draw-method-rgb565-mmap-wc-ytiled.html

  * igt@kms_flip@wf_vblank-ts-check@a-edp1:
    - shard-tglb:         [PASS][19] -> [DMESG-WARN][20] ([i915#1982]) +1 similar issue
   [19]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/shard-tglb2/igt@kms_flip@wf_vblank-ts-check@a-edp1.html
   [20]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/shard-tglb1/igt@kms_flip@wf_vblank-ts-check@a-edp1.html

  * igt@kms_hdr@bpc-switch-suspend:
    - shard-kbl:          [PASS][21] -> [DMESG-WARN][22] ([i915#180]) +2 similar issues
   [21]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/shard-kbl1/igt@kms_hdr@bpc-switch-suspend.html
   [22]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/shard-kbl6/igt@kms_hdr@bpc-switch-suspend.html

  * igt@kms_plane_alpha_blend@pipe-c-coverage-7efc:
    - shard-skl:          [PASS][23] -> [FAIL][24] ([fdo#108145] / [i915#265])
   [23]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/shard-skl1/igt@kms_plane_alpha_blend@pipe-c-coverage-7efc.html
   [24]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/shard-skl1/igt@kms_plane_alpha_blend@pipe-c-coverage-7efc.html

  * igt@kms_psr2_su@page_flip:
    - shard-iclb:         [PASS][25] -> [SKIP][26] ([fdo#109642] / [fdo#111068])
   [25]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/shard-iclb2/igt@kms_psr2_su@page_flip.html
   [26]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/shard-iclb5/igt@kms_psr2_su@page_flip.html

  * igt@kms_psr@psr2_sprite_plane_move:
    - shard-iclb:         [PASS][27] -> [SKIP][28] ([fdo#109441]) +2 similar issues
   [27]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/shard-iclb2/igt@kms_psr@psr2_sprite_plane_move.html
   [28]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/shard-iclb5/igt@kms_psr@psr2_sprite_plane_move.html

  
#### Possible fixes ####

  * igt@gem_eio@kms:
    - shard-hsw:          [INCOMPLETE][29] -> [PASS][30]
   [29]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/shard-hsw2/igt@gem_eio@kms.html
   [30]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/shard-hsw2/igt@gem_eio@kms.html

  * igt@gem_exec_balancer@nop:
    - shard-iclb:         [INCOMPLETE][31] ([i915#2268]) -> [PASS][32]
   [31]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/shard-iclb2/igt@gem_exec_balancer@nop.html
   [32]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/shard-iclb8/igt@gem_exec_balancer@nop.html

  * igt@kms_cursor_legacy@cursora-vs-flipb-atomic-transitions:
    - shard-hsw:          [INCOMPLETE][33] ([CI#80]) -> [PASS][34]
   [33]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/shard-hsw7/igt@kms_cursor_legacy@cursora-vs-flipb-atomic-transitions.html
   [34]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/shard-hsw4/igt@kms_cursor_legacy@cursora-vs-flipb-atomic-transitions.html

  * igt@kms_flip@flip-vs-absolute-wf_vblank-interruptible@a-dp1:
    - shard-kbl:          [DMESG-WARN][35] ([i915#1982]) -> [PASS][36]
   [35]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/shard-kbl4/igt@kms_flip@flip-vs-absolute-wf_vblank-interruptible@a-dp1.html
   [36]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/shard-kbl2/igt@kms_flip@flip-vs-absolute-wf_vblank-interruptible@a-dp1.html

  * igt@kms_flip@flip-vs-suspend@c-dp1:
    - shard-kbl:          [DMESG-WARN][37] ([i915#180]) -> [PASS][38] +4 similar issues
   [37]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/shard-kbl6/igt@kms_flip@flip-vs-suspend@c-dp1.html
   [38]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/shard-kbl2/igt@kms_flip@flip-vs-suspend@c-dp1.html

  * igt@kms_frontbuffer_tracking@fbc-shrfb-scaledprimary:
    - shard-iclb:         [DMESG-WARN][39] ([i915#1982]) -> [PASS][40]
   [39]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/shard-iclb3/igt@kms_frontbuffer_tracking@fbc-shrfb-scaledprimary.html
   [40]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/shard-iclb4/igt@kms_frontbuffer_tracking@fbc-shrfb-scaledprimary.html

  * igt@kms_frontbuffer_tracking@psr-1p-primscrn-pri-indfb-draw-mmap-cpu:
    - shard-skl:          [FAIL][41] ([i915#49]) -> [PASS][42]
   [41]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/shard-skl10/igt@kms_frontbuffer_tracking@psr-1p-primscrn-pri-indfb-draw-mmap-cpu.html
   [42]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/shard-skl3/igt@kms_frontbuffer_tracking@psr-1p-primscrn-pri-indfb-draw-mmap-cpu.html

  * igt@kms_plane@plane-panning-bottom-right-pipe-a-planes:
    - shard-skl:          [DMESG-WARN][43] ([i915#1982]) -> [PASS][44] +4 similar issues
   [43]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/shard-skl1/igt@kms_plane@plane-panning-bottom-right-pipe-a-planes.html
   [44]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/shard-skl5/igt@kms_plane@plane-panning-bottom-right-pipe-a-planes.html

  * igt@kms_plane_alpha_blend@pipe-a-coverage-7efc:
    - shard-skl:          [FAIL][45] ([fdo#108145] / [i915#265]) -> [PASS][46]
   [45]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/shard-skl6/igt@kms_plane_alpha_blend@pipe-a-coverage-7efc.html
   [46]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/shard-skl8/igt@kms_plane_alpha_blend@pipe-a-coverage-7efc.html

  * igt@kms_psr@psr2_primary_page_flip:
    - shard-iclb:         [SKIP][47] ([fdo#109441]) -> [PASS][48] +1 similar issue
   [47]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/shard-iclb8/igt@kms_psr@psr2_primary_page_flip.html
   [48]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/shard-iclb2/igt@kms_psr@psr2_primary_page_flip.html

  * igt@prime_busy@after-wait@vcs0:
    - shard-hsw:          [FAIL][49] ([i915#2258]) -> [PASS][50] +1 similar issue
   [49]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/shard-hsw8/igt@prime_busy@after-wait@vcs0.html
   [50]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/shard-hsw7/igt@prime_busy@after-wait@vcs0.html

  
#### Warnings ####

  * igt@gem_exec_reloc@basic-concurrent16:
    - shard-snb:          [FAIL][51] ([i915#1930]) -> [TIMEOUT][52] ([i915#1958])
   [51]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/shard-snb6/igt@gem_exec_reloc@basic-concurrent16.html
   [52]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/shard-snb4/igt@gem_exec_reloc@basic-concurrent16.html

  * igt@i915_pm_dc@dc6-psr:
    - shard-skl:          [FAIL][53] ([i915#1899]) -> [DMESG-FAIL][54] ([i915#1982])
   [53]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/shard-skl10/igt@i915_pm_dc@dc6-psr.html
   [54]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/shard-skl9/igt@i915_pm_dc@dc6-psr.html

  * igt@kms_plane_alpha_blend@pipe-a-constant-alpha-min:
    - shard-skl:          [DMESG-WARN][55] ([i915#1982]) -> [FAIL][56] ([fdo#108145] / [i915#265])
   [55]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/shard-skl3/igt@kms_plane_alpha_blend@pipe-a-constant-alpha-min.html
   [56]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/shard-skl2/igt@kms_plane_alpha_blend@pipe-a-constant-alpha-min.html

  * igt@kms_plane_alpha_blend@pipe-c-constant-alpha-min:
    - shard-skl:          [FAIL][57] ([fdo#108145] / [i915#265]) -> [DMESG-WARN][58] ([i915#1982])
   [57]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/shard-skl3/igt@kms_plane_alpha_blend@pipe-c-constant-alpha-min.html
   [58]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/shard-skl7/igt@kms_plane_alpha_blend@pipe-c-constant-alpha-min.html

  * igt@kms_plane_lowres@pipe-a-tiling-yf:
    - shard-snb:          [SKIP][59] ([fdo#109271]) -> [TIMEOUT][60] ([i915#1958]) +2 similar issues
   [59]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8848/shard-snb6/igt@kms_plane_lowres@pipe-a-tiling-yf.html
   [60]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_18313/shard-snb4/igt@kms_plane_lowres@pipe-a-tiling-yf.html

  
  [CI#80]: https://gitlab.freedesktop.org/gfx-ci/i915-infra/issues/80
  [fdo#108145]: https://bugs.freedesktop.org/show_bug.cgi?id=108145
  [fdo#109271]: https://bugs.freedesktop.org/show_bug.cgi?id=109271
  [fdo#109441]: https://bugs.freedesktop.org/show_bug.cgi?id=109441
  [fdo#109642]: https://bugs.freedesktop.org/show_bug.cgi?id=109642
  [fdo#111068]: https://bugs.freedesktop.org/show_bug.cgi?id=111068
  [i915#118]: https://gitlab.freedesktop.org/drm/intel/issues/118
  [i915#1635]: https://gitlab.freedesktop.org/drm/intel/issues/1635
  [i915#180]: https://gitlab.freedesktop.org/drm/intel/issues/180
  [i915#1899]: https://gitlab.freedesktop.org/drm/intel/issues/1899
  [i915#1930]: https://gitlab.freedesktop.org/drm/intel/issues/1930
  [i915#1958]: https://gitlab.freedesktop.org/drm/intel/issues/1958
  [i915#198]: https://gitlab.freedesktop.org/drm/intel/issues/198
  [i915#1982]: https://gitlab.freedesktop.org/drm/intel/issues/1982
  [i915#2258]: https://gitlab.freedesktop.org/drm/intel/issues/2258
  [i915#2268]: https://gitlab.freedesktop.org/drm/intel/issues/2268
  [i915#265]: https://gitlab.freedesktop.org/drm/intel/issues/265
  [i915#49]: https://gitlab.freedesktop.org/drm/intel/issues/49
  [i915#95]: https://gitlab.freedesktop.org/drm/intel/issues/95


Participating hosts (11 -> 11)
------------------------------

  No changes in participating hosts


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

  * Linux: CI_DRM_8848 -> Patchwork_18313

  CI-20190529: 20190529
  CI_DRM_8848: f39035176cb854c6d620af7614a60a485ee26818 @ git://anongit.freedesktop.org/gfx-ci/linux
  IGT_5760: 53d2ddd2f5f7beb98a996d7f2c3976c87d4da01f @ git://anongit.freedesktop.org/xorg/app/intel-gpu-tools
  Patchwork_18313: 41b2ea22bde1a6363c2a9955b323c283b76c2021 @ 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_18313/index.html

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