drm/sched: Mark scheduler work queues with WQ_MEM_RECLAIM

drm_gpu_scheduler.submit_wq is used to submit jobs, jobs are in the path
of dma-fences, and dma-fences are in the path of reclaim. Mark scheduler
work queue with WQ_MEM_RECLAIM to ensure forward progress during
reclaim; without WQ_MEM_RECLAIM, work queues cannot make forward
progress during reclaim.

v2:
 - Fixes tags (Philipp)
 - Reword commit message (Philipp)

Cc: Luben Tuikov <[email protected]>
Cc: Danilo Krummrich <[email protected]>
Cc: Philipp Stanner <[email protected]>
Cc: [email protected]
Fixes: 34f50cc ("drm/sched: Use drm sched lockdep map for submit_wq")
Fixes: a6149f0 ("drm/sched: Convert drm scheduler to use a work queue rather than kthread")
Signed-off-by: Matthew Brost <[email protected]>
Acked-by: Nirmoy Das <[email protected]>
Reviewed-by: Philipp Stanner <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Signed-off-by: Rodrigo Vivi <[email protected]>

Author: mbrost05

drivers/gpu/drm/scheduler/sched_main.c

@@ -1276,10 +1276,11 @@ int drm_sched_init(struct drm_gpu_scheduler *sched,
 		sched->own_submit_wq = false;
 	} else {
 #ifdef CONFIG_LOCKDEP
-		sched->submit_wq = alloc_ordered_workqueue_lockdep_map(name, 0,
+		sched->submit_wq = alloc_ordered_workqueue_lockdep_map(name,
+								       WQ_MEM_RECLAIM,
 								       &drm_sched_lockdep_map);
 #else
-		sched->submit_wq = alloc_ordered_workqueue(name, 0);
+		sched->submit_wq = alloc_ordered_workqueue(name, WQ_MEM_RECLAIM);
 #endif
 		if (!sched->submit_wq)
 			return -ENOMEM;