[PATCH 1/3] drm/amdkfd: Add some eveiction debugging code

[Philip Cox]

Extending the module parameter debug_evictions to also print a stack
trace when the eviction code path is called.

Signed-off-by: Philip Cox <Philip.Cox at amd.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c | 1 +
 drivers/gpu/drm/amd/amdkfd/kfd_process.c              | 1 +
 2 files changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
index 20ef048d6a03..cafbc3aa980a 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
@@ -1966,6 +1966,7 @@ int kfd_process_vm_fault(struct device_queue_manager *dqm,
 
 	if (!p)
 		return -EINVAL;
+	WARN(debug_evictions, "Evicting pid %d", p->lead_thread->pid);
 	pdd = kfd_get_process_device_data(dqm->dev, p);
 	if (pdd)
 		ret = dqm->ops.evict_process_queues(dqm, &pdd->qpd);
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
index a0e12a79ab7d..1e15aa7d8ae8 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
@@ -1488,6 +1488,7 @@ void kfd_suspend_all_processes(void)
 	unsigned int temp;
 	int idx = srcu_read_lock(&kfd_processes_srcu);
 
+	WARN(debug_evictions, "Evicting all processes");
 	hash_for_each_rcu(kfd_processes_table, temp, p, kfd_processes) {
 		cancel_delayed_work_sync(&p->eviction_work);
 		cancel_delayed_work_sync(&p->restore_work);
-- 
2.17.1