On 4/22/21 7:57 AM, Christian König wrote:
From: Shiwu Zhang <[email protected]>

In case that all pre-allocated BOs are busy, just continue to populate
BOs since likely half of system memory in total is still free.

v4 (chk): fix code moved to VMWGFX as well

Signed-off-by: Shiwu Zhang <[email protected]>
Reviewed-by: Christian König <[email protected]>
Signed-off-by: Christian König <[email protected]>
---
  drivers/gpu/drm/ttm/ttm_device.c    | 2 +-
  drivers/gpu/drm/ttm/ttm_tt.c        | 2 ++
  drivers/gpu/drm/vmwgfx/ttm_memory.c | 2 +-
  3 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/ttm/ttm_device.c b/drivers/gpu/drm/ttm/ttm_device.c
index 1f2024164d72..5dc92b056f0a 100644
--- a/drivers/gpu/drm/ttm/ttm_device.c
+++ b/drivers/gpu/drm/ttm/ttm_device.c
@@ -112,7 +112,7 @@ int ttm_global_swapout(struct ttm_operation_ctx *ctx, gfp_t 
gfp_flags)
  {
        struct ttm_global *glob = &ttm_glob;
        struct ttm_device *bdev;
-       int ret = -EBUSY;
+       int ret = 0;

Looks good to me. Updating the comment above that function to note it returns 
either tge number of pages swapped out or an error might be a good idea because 
it's not obvious from the name.

Reviewed-by: Zack Rusin <[email protected]>
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