[Intel-gfx] [CI 1/3] drm/i915/execlists: Take a reference while capturing the guilty request

[Intel-gfx] [CI 1/3] drm/i915/execlists: Take a reference while capturing the guilty request

[Chris Wilson]

Thanks to preempt-to-busy, we leave the request on the HW as we submit
the preemption request. This means that the request may complete at any
moment as we process HW events, and in particular the request may be
retired as we are planning to capture it for a preemption timeout.

Be more careful while obtaining the request to capture after a
preemption timeout, and check to see if it completed before we were able
to put it on the on-hold list. If we do see it did complete just before
we capture the request, proclaim the preemption-timeout a false positive
and pardon the reset as we should hit an arbitration point momentarily
and so be able to process the preemption.

Note that even after we move the request to be on hold it may be retired
(as the reset to stop the HW comes after), so we do require to hold our
own reference as we work on the request for capture (and all of the
peeking at state within the request needs to be carefully protected).

Fixes: 32ff621fd744 ("drm/i915/gt: Allow temporary suspension of inflight requests")
Closes: https://gitlab.freedesktop.org/drm/intel/issues/997
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewd-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_lrc.c    | 39 ++++++++++++++++++++------
 drivers/gpu/drm/i915/gt/selftest_lrc.c |  3 +-
 2 files changed, 32 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
index 3a30767ff0c4..4810c62144ae 100644
--- a/drivers/gpu/drm/i915/gt/intel_lrc.c
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
@@ -2393,11 +2393,16 @@ static void __execlists_hold(struct i915_request *rq)
 	} while (rq);
 }
 
-static void execlists_hold(struct intel_engine_cs *engine,
+static bool execlists_hold(struct intel_engine_cs *engine,
 			   struct i915_request *rq)
 {
 	spin_lock_irq(&engine->active.lock);
 
+	if (i915_request_completed(rq)) { /* too late! */
+		rq = NULL;
+		goto unlock;
+	}
+
 	/*
 	 * Transfer this request onto the hold queue to prevent it
 	 * being resumbitted to HW (and potentially completed) before we have
@@ -2408,7 +2413,9 @@ static void execlists_hold(struct intel_engine_cs *engine,
 	GEM_BUG_ON(rq->engine != engine);
 	__execlists_hold(rq);
 
+unlock:
 	spin_unlock_irq(&engine->active.lock);
+	return rq;
 }
 
 static bool hold_request(const struct i915_request *rq)
@@ -2524,6 +2531,7 @@ static void execlists_capture_work(struct work_struct *work)
 
 	/* Return this request and all that depend upon it for signaling */
 	execlists_unhold(engine, cap->rq);
+	i915_request_put(cap->rq);
 
 	kfree(cap);
 }
@@ -2560,12 +2568,12 @@ static struct execlists_capture *capture_regs(struct intel_engine_cs *engine)
 	return NULL;
 }
 
-static void execlists_capture(struct intel_engine_cs *engine)
+static bool execlists_capture(struct intel_engine_cs *engine)
 {
 	struct execlists_capture *cap;
 
 	if (!IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR))
-		return;
+		return true;
 
 	/*
 	 * We need to _quickly_ capture the engine state before we reset.
@@ -2574,13 +2582,17 @@ static void execlists_capture(struct intel_engine_cs *engine)
 	 */
 	cap = capture_regs(engine);
 	if (!cap)
-		return;
+		return true;
 
 	cap->rq = execlists_active(&engine->execlists);
 	GEM_BUG_ON(!cap->rq);
 
+	rcu_read_lock();
 	cap->rq = active_request(cap->rq->context->timeline, cap->rq);
-	GEM_BUG_ON(!cap->rq);
+	cap->rq = i915_request_get_rcu(cap->rq);
+	rcu_read_unlock();
+	if (!cap->rq)
+		goto err_free;
 
 	/*
 	 * Remove the request from the execlists queue, and take ownership
@@ -2602,10 +2614,19 @@ static void execlists_capture(struct intel_engine_cs *engine)
 	 * simply hold that request accountable for being non-preemptible
 	 * long enough to force the reset.
 	 */
-	execlists_hold(engine, cap->rq);
+	if (!execlists_hold(engine, cap->rq))
+		goto err_rq;
 
 	INIT_WORK(&cap->work, execlists_capture_work);
 	schedule_work(&cap->work);
+	return true;
+
+err_rq:
+	i915_request_put(cap->rq);
+err_free:
+	i915_gpu_coredump_put(cap->error);
+	kfree(cap);
+	return false;
 }
 
 static noinline void preempt_reset(struct intel_engine_cs *engine)
@@ -2627,8 +2648,10 @@ static noinline void preempt_reset(struct intel_engine_cs *engine)
 		     jiffies_to_msecs(jiffies - engine->execlists.preempt.expires));
 
 	ring_set_paused(engine, 1); /* Freeze the current request in place */
-	execlists_capture(engine);
-	intel_engine_reset(engine, "preemption time out");
+	if (execlists_capture(engine))
+		intel_engine_reset(engine, "preemption time out");
+	else
+		ring_set_paused(engine, 0);
 
 	tasklet_enable(&engine->execlists.tasklet);
 	clear_and_wake_up_bit(bit, lock);
diff --git a/drivers/gpu/drm/i915/gt/selftest_lrc.c b/drivers/gpu/drm/i915/gt/selftest_lrc.c
index b208c2176bbd..e3a408baad0f 100644
--- a/drivers/gpu/drm/i915/gt/selftest_lrc.c
+++ b/drivers/gpu/drm/i915/gt/selftest_lrc.c
@@ -335,7 +335,6 @@ static int live_hold_reset(void *arg)
 
 		if (test_and_set_bit(I915_RESET_ENGINE + id,
 				     &gt->reset.flags)) {
-			spin_unlock_irq(&engine->active.lock);
 			intel_gt_set_wedged(gt);
 			err = -EBUSY;
 			goto out;
@@ -345,6 +344,7 @@ static int live_hold_reset(void *arg)
 		engine->execlists.tasklet.func(engine->execlists.tasklet.data);
 		GEM_BUG_ON(execlists_active(&engine->execlists) != rq);
 
+		i915_request_get(rq);
 		execlists_hold(engine, rq);
 		GEM_BUG_ON(!i915_request_on_hold(rq));
 
@@ -356,7 +356,6 @@ static int live_hold_reset(void *arg)
 				      &gt->reset.flags);
 
 		/* Check that we do not resubmit the held request */
-		i915_request_get(rq);
 		if (!i915_request_wait(rq, 0, HZ / 5)) {
 			pr_err("%s: on hold request completed!\n",
 			       engine->name);
-- 
2.25.0

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[Intel-gfx] [CI 2/3] drm/i915/execlists: Reclaim the hanging virtual request

[Chris Wilson]

If we encounter a hang on a virtual engine, as we process the hang the
request may already have been moved back to the virtual engine (we are
processing the hang on the physical engine). We need to reclaim the
request from the virtual engine so that the locking is consistent and
local to the real engine on which we will hold the request for error
state capturing.

v2: Pull the reclamation into execlists_hold() and assert that cannot be
called from outside of the reset (i.e. with the tasklet disabled).
v3: Added selftest
v4: Drop the reference owned by the virtual engine

Fixes: 748317386afb ("drm/i915/execlists: Offline error capture")
Testcase: igt/gem_exec_balancer/hang
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_lrc.c    |  29 +++++
 drivers/gpu/drm/i915/gt/selftest_lrc.c | 156 +++++++++++++++++++++++++
 2 files changed, 185 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
index 4810c62144ae..a13a8c4b65ab 100644
--- a/drivers/gpu/drm/i915/gt/intel_lrc.c
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
@@ -2403,6 +2403,35 @@ static bool execlists_hold(struct intel_engine_cs *engine,
 		goto unlock;
 	}
 
+	if (rq->engine != engine) { /* preempted virtual engine */
+		struct virtual_engine *ve = to_virtual_engine(rq->engine);
+
+		/*
+		 * intel_context_inflight() is only protected by virtue
+		 * of process_csb() being called only by the tasklet (or
+		 * directly from inside reset while the tasklet is suspended).
+		 * Assert that neither of those are allowed to run while we
+		 * poke at the request queues.
+		 */
+		GEM_BUG_ON(!reset_in_progress(&engine->execlists));
+
+		/*
+		 * An unsubmitted request along a virtual engine will
+		 * remain on the active (this) engine until we are able
+		 * to process the context switch away (and so mark the
+		 * context as no longer in flight). That cannot have happened
+		 * yet, otherwise we would not be hanging!
+		 */
+		spin_lock(&ve->base.active.lock);
+		GEM_BUG_ON(intel_context_inflight(rq->context) != engine);
+		GEM_BUG_ON(ve->request != rq);
+		ve->request = NULL;
+		spin_unlock(&ve->base.active.lock);
+		i915_request_put(rq);
+
+		rq->engine = engine;
+	}
+
 	/*
 	 * Transfer this request onto the hold queue to prevent it
 	 * being resumbitted to HW (and potentially completed) before we have
diff --git a/drivers/gpu/drm/i915/gt/selftest_lrc.c b/drivers/gpu/drm/i915/gt/selftest_lrc.c
index e3a408baad0f..65718ca2326e 100644
--- a/drivers/gpu/drm/i915/gt/selftest_lrc.c
+++ b/drivers/gpu/drm/i915/gt/selftest_lrc.c
@@ -3410,6 +3410,161 @@ static int live_virtual_bond(void *arg)
 	return 0;
 }
 
+static int reset_virtual_engine(struct intel_gt *gt,
+				struct intel_engine_cs **siblings,
+				unsigned int nsibling)
+{
+	struct intel_engine_cs *engine;
+	struct intel_context *ve;
+	unsigned long *heartbeat;
+	struct igt_spinner spin;
+	struct i915_request *rq;
+	unsigned int n;
+	int err = 0;
+
+	/*
+	 * In order to support offline error capture for fast preempt reset,
+	 * we need to decouple the guilty request and ensure that it and its
+	 * descendents are not executed while the capture is in progress.
+	 */
+
+	heartbeat = kmalloc_array(nsibling, sizeof(*heartbeat), GFP_KERNEL);
+	if (!heartbeat)
+		return -ENOMEM;
+
+	if (igt_spinner_init(&spin, gt)) {
+		err = -ENOMEM;
+		goto out_free;
+	}
+
+	ve = intel_execlists_create_virtual(siblings, nsibling);
+	if (IS_ERR(ve)) {
+		err = PTR_ERR(ve);
+		goto out_spin;
+	}
+
+	for (n = 0; n < nsibling; n++)
+		engine_heartbeat_disable(siblings[n], &heartbeat[n]);
+
+	rq = igt_spinner_create_request(&spin, ve, MI_ARB_CHECK);
+	if (IS_ERR(rq)) {
+		err = PTR_ERR(rq);
+		goto out_heartbeat;
+	}
+	i915_request_add(rq);
+
+	if (!igt_wait_for_spinner(&spin, rq)) {
+		intel_gt_set_wedged(gt);
+		err = -ETIME;
+		goto out_heartbeat;
+	}
+
+	engine = rq->engine;
+	GEM_BUG_ON(engine == ve->engine);
+
+	/* Take ownership of the reset and tasklet */
+	if (test_and_set_bit(I915_RESET_ENGINE + engine->id,
+			     &gt->reset.flags)) {
+		intel_gt_set_wedged(gt);
+		err = -EBUSY;
+		goto out_heartbeat;
+	}
+	tasklet_disable(&engine->execlists.tasklet);
+
+	engine->execlists.tasklet.func(engine->execlists.tasklet.data);
+	GEM_BUG_ON(execlists_active(&engine->execlists) != rq);
+
+	/* Fake a preemption event; failed of course */
+	spin_lock_irq(&engine->active.lock);
+	__unwind_incomplete_requests(engine);
+	spin_unlock_irq(&engine->active.lock);
+	GEM_BUG_ON(rq->engine != ve->engine);
+
+	/* Reset the engine while keeping our active request on hold */
+	execlists_hold(engine, rq);
+	GEM_BUG_ON(!i915_request_on_hold(rq));
+
+	intel_engine_reset(engine, NULL);
+	GEM_BUG_ON(rq->fence.error != -EIO);
+
+	/* Release our grasp on the engine, letting CS flow again */
+	tasklet_enable(&engine->execlists.tasklet);
+	clear_and_wake_up_bit(I915_RESET_ENGINE + engine->id, &gt->reset.flags);
+
+	/* Check that we do not resubmit the held request */
+	i915_request_get(rq);
+	if (!i915_request_wait(rq, 0, HZ / 5)) {
+		pr_err("%s: on hold request completed!\n",
+		       engine->name);
+		intel_gt_set_wedged(gt);
+		err = -EIO;
+		goto out_rq;
+	}
+	GEM_BUG_ON(!i915_request_on_hold(rq));
+
+	/* But is resubmitted on release */
+	execlists_unhold(engine, rq);
+	if (i915_request_wait(rq, 0, HZ / 5) < 0) {
+		pr_err("%s: held request did not complete!\n",
+		       engine->name);
+		intel_gt_set_wedged(gt);
+		err = -ETIME;
+	}
+
+out_rq:
+	i915_request_put(rq);
+out_heartbeat:
+	for (n = 0; n < nsibling; n++)
+		engine_heartbeat_enable(siblings[n], heartbeat[n]);
+
+	intel_context_put(ve);
+out_spin:
+	igt_spinner_fini(&spin);
+out_free:
+	kfree(heartbeat);
+	return err;
+}
+
+static int live_virtual_reset(void *arg)
+{
+	struct intel_gt *gt = arg;
+	struct intel_engine_cs *siblings[MAX_ENGINE_INSTANCE + 1];
+	unsigned int class, inst;
+
+	/*
+	 * Check that we handle a reset event within a virtual engine.
+	 * Only the physical engine is reset, but we have to check the flow
+	 * of the virtual requests around the reset, and make sure it is not
+	 * forgotten.
+	 */
+
+	if (USES_GUC_SUBMISSION(gt->i915))
+		return 0;
+
+	if (!intel_has_reset_engine(gt))
+		return 0;
+
+	for (class = 0; class <= MAX_ENGINE_CLASS; class++) {
+		int nsibling, err;
+
+		nsibling = 0;
+		for (inst = 0; inst <= MAX_ENGINE_INSTANCE; inst++) {
+			if (!gt->engine_class[class][inst])
+				continue;
+
+			siblings[nsibling++] = gt->engine_class[class][inst];
+		}
+		if (nsibling < 2)
+			continue;
+
+		err = reset_virtual_engine(gt, siblings, nsibling);
+		if (err)
+			return err;
+	}
+
+	return 0;
+}
+
 int intel_execlists_live_selftests(struct drm_i915_private *i915)
 {
 	static const struct i915_subtest tests[] = {
@@ -3435,6 +3590,7 @@ int intel_execlists_live_selftests(struct drm_i915_private *i915)
 		SUBTEST(live_virtual_mask),
 		SUBTEST(live_virtual_preserved),
 		SUBTEST(live_virtual_bond),
+		SUBTEST(live_virtual_reset),
 	};
 
 	if (!HAS_EXECLISTS(i915))
-- 
2.25.0

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[Intel-gfx] [CI 3/3] drm/i915: Mark the removal of the i915_request from the sched.link

[Chris Wilson]

Keep the rq->fence.flags consistent with the status of the
rq->sched.link, and clear the associated bits when decoupling the link
on retirement (as we may wish to inspect those flags independent of
other state).

Fixes: 32ff621fd744 ("drm/i915/gt: Allow temporary suspension of inflight requests")
References: https://gitlab.freedesktop.org/drm/intel/issues/997
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
---
 drivers/gpu/drm/i915/i915_request.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c
index 9ed0d3bc7249..78a5f5d3c070 100644
--- a/drivers/gpu/drm/i915/i915_request.c
+++ b/drivers/gpu/drm/i915/i915_request.c
@@ -221,6 +221,8 @@ static void remove_from_engine(struct i915_request *rq)
 		locked = engine;
 	}
 	list_del_init(&rq->sched.link);
+	clear_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags);
+	clear_bit(I915_FENCE_FLAG_HOLD, &rq->fence.flags);
 	spin_unlock_irq(&locked->active.lock);
 }
 
-- 
2.25.0

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[Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for series starting with [CI,1/3] drm/i915/execlists: Take a reference while capturing the guilty request

[Patchwork]

== Series Details ==

Series: series starting with [CI,1/3] drm/i915/execlists: Take a reference while capturing the guilty request
URL   : https://patchwork.freedesktop.org/series/72400/
State : warning

== Summary ==

$ dim checkpatch origin/drm-tip
8f0868652c32 drm/i915/execlists: Take a reference while capturing the guilty request
-:28: WARNING:BAD_SIGN_OFF: Non-standard signature: Reviewd-by:
#28: 
Reviewd-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>

total: 0 errors, 1 warnings, 0 checks, 119 lines checked
472e1c4d5efe drm/i915/execlists: Reclaim the hanging virtual request
84eecabf77f0 drm/i915: Mark the removal of the i915_request from the sched.link

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[Intel-gfx] ✗ Fi.CI.BAT: failure for series starting with [CI,1/3] drm/i915/execlists: Take a reference while capturing the guilty request

[Patchwork]

== Series Details ==

Series: series starting with [CI,1/3] drm/i915/execlists: Take a reference while capturing the guilty request
URL   : https://patchwork.freedesktop.org/series/72400/
State : failure

== Summary ==

CI Bug Log - changes from CI_DRM_7793 -> Patchwork_16211
====================================================

Summary
-------

  **FAILURE**

  Serious unknown changes coming with Patchwork_16211 absolutely need to be
  verified manually.
  
  If you think the reported changes have nothing to do with the changes
  introduced in Patchwork_16211, please notify your bug team to allow them
  to document this new failure mode, which will reduce false positives in CI.

  External URL: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_16211/index.html

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

  Here are the unknown changes that may have been introduced in Patchwork_16211:

### IGT changes ###

#### Possible regressions ####

  * igt@gem_exec_parallel@contexts:
    - fi-byt-j1900:       NOTRUN -> [FAIL][1]
   [1]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_16211/fi-byt-j1900/igt@gem_exec_parallel@contexts.html

  
#### Warnings ####

  * igt@gem_exec_parallel@contexts:
    - fi-byt-n2820:       [TIMEOUT][2] ([fdo#112271]) -> [FAIL][3]
   [2]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7793/fi-byt-n2820/igt@gem_exec_parallel@contexts.html
   [3]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_16211/fi-byt-n2820/igt@gem_exec_parallel@contexts.html

  
#### Suppressed ####

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

  * igt@i915_selftest@live_gt_engines:
    - {fi-ehl-1}:         NOTRUN -> [FAIL][4] +31 similar issues
   [4]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_16211/fi-ehl-1/igt@i915_selftest@live_gt_engines.html

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

  Here are the changes found in Patchwork_16211 that come from known issues:

### IGT changes ###

#### Issues hit ####

  * igt@i915_module_load@reload-with-fault-injection:
    - fi-kbl-7500u:       [PASS][5] -> [INCOMPLETE][6] ([i915#879])
   [5]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7793/fi-kbl-7500u/igt@i915_module_load@reload-with-fault-injection.html
   [6]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_16211/fi-kbl-7500u/igt@i915_module_load@reload-with-fault-injection.html

  * igt@kms_chamelium@common-hpd-after-suspend:
    - fi-skl-6700k2:      [PASS][7] -> [INCOMPLETE][8] ([i915#69])
   [7]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7793/fi-skl-6700k2/igt@kms_chamelium@common-hpd-after-suspend.html
   [8]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_16211/fi-skl-6700k2/igt@kms_chamelium@common-hpd-after-suspend.html

  
#### Possible fixes ####

  * igt@i915_module_load@reload-with-fault-injection:
    - fi-kbl-x1275:       [INCOMPLETE][9] ([i915#879]) -> [PASS][10]
   [9]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7793/fi-kbl-x1275/igt@i915_module_load@reload-with-fault-injection.html
   [10]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_16211/fi-kbl-x1275/igt@i915_module_load@reload-with-fault-injection.html

  * igt@i915_selftest@live_blt:
    - fi-hsw-4770r:       [DMESG-FAIL][11] ([i915#553] / [i915#725]) -> [PASS][12]
   [11]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7793/fi-hsw-4770r/igt@i915_selftest@live_blt.html
   [12]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_16211/fi-hsw-4770r/igt@i915_selftest@live_blt.html
    - fi-hsw-4770:        [DMESG-FAIL][13] ([i915#563]) -> [PASS][14]
   [13]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7793/fi-hsw-4770/igt@i915_selftest@live_blt.html
   [14]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_16211/fi-hsw-4770/igt@i915_selftest@live_blt.html

  * igt@i915_selftest@live_gem_contexts:
    - fi-byt-n2820:       [DMESG-FAIL][15] ([i915#722]) -> [PASS][16]
   [15]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7793/fi-byt-n2820/igt@i915_selftest@live_gem_contexts.html
   [16]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_16211/fi-byt-n2820/igt@i915_selftest@live_gem_contexts.html

  * igt@kms_chamelium@hdmi-hpd-fast:
    - fi-kbl-7500u:       [FAIL][17] ([fdo#111096] / [i915#323]) -> [PASS][18]
   [17]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7793/fi-kbl-7500u/igt@kms_chamelium@hdmi-hpd-fast.html
   [18]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_16211/fi-kbl-7500u/igt@kms_chamelium@hdmi-hpd-fast.html

  
#### Warnings ####

  * igt@i915_module_load@reload-with-fault-injection:
    - fi-skl-lmem:        [INCOMPLETE][19] ([i915#671] / [i915#971]) -> [DMESG-WARN][20] ([i915#889])
   [19]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7793/fi-skl-lmem/igt@i915_module_load@reload-with-fault-injection.html
   [20]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_16211/fi-skl-lmem/igt@i915_module_load@reload-with-fault-injection.html

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

  [fdo#111096]: https://bugs.freedesktop.org/show_bug.cgi?id=111096
  [fdo#112271]: https://bugs.freedesktop.org/show_bug.cgi?id=112271
  [i915#323]: https://gitlab.freedesktop.org/drm/intel/issues/323
  [i915#553]: https://gitlab.freedesktop.org/drm/intel/issues/553
  [i915#563]: https://gitlab.freedesktop.org/drm/intel/issues/563
  [i915#671]: https://gitlab.freedesktop.org/drm/intel/issues/671
  [i915#69]: https://gitlab.freedesktop.org/drm/intel/issues/69
  [i915#722]: https://gitlab.freedesktop.org/drm/intel/issues/722
  [i915#725]: https://gitlab.freedesktop.org/drm/intel/issues/725
  [i915#879]: https://gitlab.freedesktop.org/drm/intel/issues/879
  [i915#889]: https://gitlab.freedesktop.org/drm/intel/issues/889
  [i915#971]: https://gitlab.freedesktop.org/drm/intel/issues/971


Participating hosts (42 -> 42)
------------------------------

  Additional (8): fi-kbl-soraka fi-ehl-1 fi-bdw-5557u fi-byt-j1900 fi-elk-e7500 fi-bsw-nick fi-skl-6600u fi-snb-2600 
  Missing    (8): fi-ilk-m540 fi-hsw-4200u fi-byt-squawks fi-bsw-cyan fi-ctg-p8600 fi-ivb-3770 fi-byt-clapper fi-kbl-r 


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

  * CI: CI-20190529 -> None
  * Linux: CI_DRM_7793 -> Patchwork_16211

  CI-20190529: 20190529
  CI_DRM_7793: 19e69df207a51a5435a4de22e71086d5bb5c6d8f @ git://anongit.freedesktop.org/gfx-ci/linux
  IGT_5377: 1e6cb3e75925cf623df04f78430ae9299632ec3f @ git://anongit.freedesktop.org/xorg/app/intel-gpu-tools
  Patchwork_16211: 84eecabf77f0a3a7b52bf6b442a29a1595511d4c @ git://anongit.freedesktop.org/gfx-ci/linux


== Linux commits ==

84eecabf77f0 drm/i915: Mark the removal of the i915_request from the sched.link
472e1c4d5efe drm/i915/execlists: Reclaim the hanging virtual request
8f0868652c32 drm/i915/execlists: Take a reference while capturing the guilty request

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_16211/index.html
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