Am 24.04.24 um 18:56 schrieb Friedrich Vock:
When undoing evictions because of decreased memory pressure, it makes no
sense to try evicting other buffers.
That duplicates some functionality.
If a driver doesn't want eviction to happen it just needs to mark the
desired placements as non-evictable with the TTM_PL_FLAG_DESIRED flag.
Regards,
Christian.
Signed-off-by: Friedrich Vock <friedrich.vock@xxxxxx>
---
drivers/gpu/drm/ttm/ttm_bo.c | 2 ++
include/drm/ttm/ttm_bo.h | 2 ++
2 files changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 9a0efbf79316c..3b89fabc2f00a 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -764,6 +764,8 @@ static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo,
break;
if (unlikely(ret != -ENOSPC))
return ret;
+ if (ctx->no_evict)
+ return -ENOSPC;
ret = ttm_mem_evict_first(bdev, man, place, ctx,
ticket);
if (unlikely(ret != 0))
diff --git a/include/drm/ttm/ttm_bo.h b/include/drm/ttm/ttm_bo.h
index 8a1a29c6fbc50..a8f21092403d6 100644
--- a/include/drm/ttm/ttm_bo.h
+++ b/include/drm/ttm/ttm_bo.h
@@ -192,6 +192,7 @@ struct ttm_operation_ctx {
bool gfp_retry_mayfail;
bool allow_res_evict;
bool force_alloc;
+ bool no_evict;
struct dma_resv *resv;
uint64_t bytes_moved;
};
@@ -358,6 +359,7 @@ static inline void *ttm_kmap_obj_virtual(struct ttm_bo_kmap_obj *map,
return map->virtual;
}
+
int ttm_bo_wait_ctx(struct ttm_buffer_object *bo,
struct ttm_operation_ctx *ctx);
int ttm_bo_validate(struct ttm_buffer_object *bo,
--
2.44.0
