It is convenient to know what processes are waiting when looking at
hangcheck status in debugfs.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuopp...@intel.com>
---
drivers/gpu/drm/i915/i915_debugfs.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c
b/drivers/gpu/drm/i915/i915_debugfs.c
index 35ce21f9aa6a..dd6348cb43b3 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1353,6 +1353,9 @@ static int i915_hangcheck_info(struct seq_file *m, void
*unused)
seq_printf(m, "Hangcheck inactive\n");
for_each_engine_id(engine, dev_priv, id) {
+ struct intel_breadcrumbs *b = &engine->breadcrumbs;
+ struct rb_node *rb;
+
seq_printf(m, "%s:\n", engine->name);
seq_printf(m, "\tseqno = %x [current %x, last %x]\n",
engine->hangcheck.seqno,
@@ -1362,6 +1365,15 @@ static int i915_hangcheck_info(struct seq_file *m, void
*unused)
yesno(intel_engine_has_waiter(engine)),
yesno(test_bit(engine->id,
&dev_priv->gpu_error.missed_irq_rings)));
+ spin_lock(&b->lock);
+ for (rb = rb_first(&b->waiters); rb; rb = rb_next(rb)) {
+ struct intel_wait *w = container_of(rb, typeof(*w),
node);
+
+ seq_printf(m, "\t%s [%d] waiting for %x\n",
+ w->tsk->comm, w->tsk->pid, w->seqno);
+ }
+ spin_unlock(&b->lock);
+
seq_printf(m, "\tACTHD = 0x%08llx [current 0x%08llx]\n",
(long long)engine->hangcheck.acthd,
(long long)acthd[id]);
--
2.9.3
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
