ping. On 2019-07-10 11:20 a.m., Huang, JinHuiEric wrote: > The cp hang occurs in OCL conformance test only on supermicro > platform which has 40 cores and the test generates 40 threads. > The root cause is race condition in non-protected flags. > > The fix is to add flags of is_evicted and is_active(init_mqd()) > into protected area. > > Signed-off-by: Eric Huang <JinhuiEric.Huang@xxxxxxx> > --- > drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c | 16 +++++++++------- > 1 file changed, 9 insertions(+), 7 deletions(-) > > 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 9ffdda5..f23e17b 100644 > --- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c > +++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c > @@ -1157,12 +1157,7 @@ static int create_queue_cpsch(struct device_queue_manager *dqm, struct queue *q, > > mqd_mgr = dqm->mqd_mgrs[get_mqd_type_from_queue_type( > q->properties.type)]; > - /* > - * Eviction state logic: mark all queues as evicted, even ones > - * not currently active. Restoring inactive queues later only > - * updates the is_evicted flag but is a no-op otherwise. > - */ > - q->properties.is_evicted = !!qpd->evicted; > + > if (q->properties.type == KFD_QUEUE_TYPE_SDMA || > q->properties.type == KFD_QUEUE_TYPE_SDMA_XGMI) > dqm->asic_ops.init_sdma_vm(dqm, q, qpd); > @@ -1173,9 +1168,16 @@ static int create_queue_cpsch(struct device_queue_manager *dqm, struct queue *q, > retval = -ENOMEM; > goto out_deallocate_doorbell; > } > + > + dqm_lock(dqm); > + /* > + * Eviction state logic: mark all queues as evicted, even ones > + * not currently active. Restoring inactive queues later only > + * updates the is_evicted flag but is a no-op otherwise. > + */ > + q->properties.is_evicted = !!qpd->evicted; > mqd_mgr->init_mqd(mqd_mgr, &q->mqd, q->mqd_mem_obj, > &q->gart_mqd_addr, &q->properties); > - dqm_lock(dqm); > > list_add(&q->list, &qpd->queues_list); > qpd->queue_count++; _______________________________________________ amd-gfx mailing list amd-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/amd-gfx
