This is a note to let you know that I've just added the patch titled
drm/ttm: never consider pinned BOs for eviction&swap
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-ttm-never-consider-pinned-bos-for-eviction-swap.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit fc9dfb80346ffa87977e4e7f8928cdfc4cd14c8e
Author: Christian König <christian.koenig@xxxxxxx>
Date: Fri Jul 7 11:25:00 2023 +0200
drm/ttm: never consider pinned BOs for eviction&swap
[ Upstream commit a2848d08742c8e8494675892c02c0d22acbe3cf8 ]
There is a small window where we have already incremented the pin count
but not yet moved the bo from the lru to the pinned list.
Signed-off-by: Christian König <christian.koenig@xxxxxxx>
Reported-by: Pelloux-Prayer, Pierre-Eric <Pierre-eric.Pelloux-prayer@xxxxxxx>
Tested-by: Pelloux-Prayer, Pierre-Eric <Pierre-eric.Pelloux-prayer@xxxxxxx>
Acked-by: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Link: https://patchwork.freedesktop.org/patch/msgid/20230707120826.3701-1-christian.koenig@xxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 9a05caec3c996..dca4dfdd332d3 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -672,6 +672,12 @@ static bool ttm_bo_evict_swapout_allowable(struct ttm_buffer_object *bo,
{
bool ret = false;
+ if (bo->pin_count) {
+ *locked = false;
+ *busy = false;
+ return false;
+ }
+
if (bo->base.resv == ctx->resv) {
dma_resv_assert_held(bo->base.resv);
if (ctx->flags & TTM_OPT_FLAG_ALLOW_RES_EVICT)
