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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [CNL] System hang when running piglit."
href="https://bugs.freedesktop.org/show_bug.cgi?id=105888#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [CNL] System hang when running piglit."
href="https://bugs.freedesktop.org/show_bug.cgi?id=105888">bug 105888</a>
from <span class="vcard"><a class="email" href="mailto:rafael.antognolli@intel.com" title="Rafael Antognolli <rafael.antognolli@intel.com>"> <span class="fn">Rafael Antognolli</span></a>
</span></b>
<pre>Cool, I'll give this a try.
Paulo also suggested disabling some individual GEM_TRACE messages, and it looks
like this brings the hang back:
diff --git a/drivers/gpu/drm/i915/intel_lrc.c
b/drivers/gpu/drm/i915/intel_lrc.c
index f60b61bf8b3b..37365ec55e63 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -927,10 +927,10 @@ static void execlists_submission_tasklet(unsigned long
data)
head = execlists->csb_head;
tail = READ_ONCE(buf[write_idx]);
}
- GEM_TRACE("%s cs-irq head=%d [%d%s], tail=%d [%d%s]\n",
- engine->name,
- head, GEN8_CSB_READ_PTR(readl(dev_priv->regs +
i915_mmio_reg_offset(RING_CONTEXT_STATUS_PTR(engine)))), fw ? "" : "?",
- tail, GEN8_CSB_WRITE_PTR(readl(dev_priv->regs +
i915_mmio_reg_offset(RING_CONTEXT_STATUS_PTR(engine)))), fw ? "" : "?");
+ /* GEM_TRACE("%s cs-irq head=%d [%d%s], tail=%d [%d%s]\n", */
+ /* engine->name, */
+ /* head, GEN8_CSB_READ_PTR(readl(dev_priv->regs +
i915_mmio_reg_offset(RING_CONTEXT_STATUS_PTR(engine)))), fw ? "" : "?", */
+ /* tail, GEN8_CSB_WRITE_PTR(readl(dev_priv->regs +
i915_mmio_reg_offset(RING_CONTEXT_STATUS_PTR(engine)))), fw ? "" : "?"); */
while (head != tail) {
struct i915_request *rq;
I'll test your suggestion and report back (might only have results by tomorrow,
since some times it takes a while to reproduce it).</pre>
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