[PATCH] drm/amdgpu:fix gpu recover missing skipping(v2)

Monk Liu Monk.Liu at amd.com
Wed Nov 8 07:08:02 UTC 2017

if app close CTX right after IB submit, gpu recover
will fail to find out the entity behind this guilty
job thus lead to no job skipping for this guilty job.

to fix this corner case just move the increasement of
job->karma out of the entity iteration.

only do karma increasment if bad->s_priority != KERNEL
because we always consider KERNEL job be correct and always
want to recover an unfinished kernel job (sometimes kernel
job is interrupted by VF FLR or other GPU hang event)

Change-Id: I33e9e959e182d7e002a2108e565cb898acac4f9c
Signed-off-by: Monk Liu <Monk.Liu at amd.com>
 drivers/gpu/drm/amd/scheduler/gpu_scheduler.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
index 7aa6455..c999026 100644
--- a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
+++ b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
@@ -463,7 +463,8 @@ void amd_sched_hw_job_reset(struct amd_gpu_scheduler *sched, struct amd_sched_jo
-	if (bad) {
+	if (bad && bad->s_priority != AMD_SCHED_PRIORITY_KERNEL) {
+		atomic_inc(&bad->karma);
 		/* don't increase @bad's karma if it's from KERNEL RQ,
 		 * becuase sometimes GPU hang would cause kernel jobs (like VM updating jobs)
 		 * corrupt but keep in mind that kernel jobs always considered good.
@@ -474,7 +475,7 @@ void amd_sched_hw_job_reset(struct amd_gpu_scheduler *sched, struct amd_sched_jo
 			list_for_each_entry_safe(entity, tmp, &rq->entities, list) {
 				if (bad->s_fence->scheduled.context == entity->fence_context) {
-				    if (atomic_inc_return(&bad->karma) > bad->sched->hang_limit)
+				    if (atomic_read(&bad->karma) > bad->sched->hang_limit)
 						if (entity->guilty)
 							atomic_set(entity->guilty, 1);

More information about the amd-gfx mailing list