From: Felix Kuehling Date: Fri, 8 Apr 2022 02:08:03 +0000 (-0400) Subject: drm/amdkfd: Asynchronously free events X-Git-Tag: microblaze-v5.20~58^2~22^2~13 X-Git-Url: http://git.monstr.eu/?a=commitdiff_plain;h=34d292d57973dd432e93425de33f8f120cfbdab3;p=linux-2.6-microblaze.git drm/amdkfd: Asynchronously free events The synchronize_rcu call in destroy_events can take several ms, which noticeably slows down applications destroying many events. Use kfree_rcu to free the event structure asynchronously and eliminate the synchronize_rcu call in the user thread. Signed-off-by: Felix Kuehling Reviewed-by: Philip Yang Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_events.c b/drivers/gpu/drm/amd/amdkfd/kfd_events.c index 0fef24b0b915..75847c5d5957 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_events.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_events.c @@ -262,8 +262,7 @@ static void destroy_event(struct kfd_process *p, struct kfd_event *ev) p->signal_event_count--; idr_remove(&p->event_idr, ev->event_id); - synchronize_rcu(); - kfree(ev); + kfree_rcu(ev, rcu); } static void destroy_events(struct kfd_process *p) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_events.h b/drivers/gpu/drm/amd/amdkfd/kfd_events.h index 55d376f56021..1c62c8dd6460 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_events.h +++ b/drivers/gpu/drm/amd/amdkfd/kfd_events.h @@ -70,6 +70,8 @@ struct kfd_event { struct kfd_hsa_memory_exception_data memory_exception_data; struct kfd_hsa_hw_exception_data hw_exception_data; }; + + struct rcu_head rcu; /* for asynchronous kfree_rcu */ }; #define KFD_EVENT_TIMEOUT_IMMEDIATE 0