[PATCH v2 1/2] drm/xe: Avoid the OOM killer on buffer object memory allocation

["Thomas Hellström" <thomas.hellstrom@linux.intel.com>]

Rather than invoking the OOM killer on buffer object memory
allocations and validations, have the allocations fail and
pass the error to user-space if applicable.

Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/2701
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
---
 drivers/gpu/drm/xe/xe_bo.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xe/xe_bo.c b/drivers/gpu/drm/xe/xe_bo.c
index 5b232f2951b1..7082290539df 100644
--- a/drivers/gpu/drm/xe/xe_bo.c
+++ b/drivers/gpu/drm/xe/xe_bo.c
@@ -876,6 +876,7 @@ int xe_bo_evict_pinned(struct xe_bo *bo)
 	};
 	struct ttm_operation_ctx ctx = {
 		.interruptible = false,
+		.gfp_retry_mayfail = true,
 	};
 	struct ttm_resource *new_mem;
 	int ret;
@@ -937,6 +938,7 @@ int xe_bo_restore_pinned(struct xe_bo *bo)
 {
 	struct ttm_operation_ctx ctx = {
 		.interruptible = false,
+		.gfp_retry_mayfail = false,
 	};
 	struct ttm_resource *new_mem;
 	int ret;
@@ -1099,7 +1101,8 @@ static void xe_ttm_bo_purge(struct ttm_buffer_object *ttm_bo, struct ttm_operati
 static void xe_ttm_bo_swap_notify(struct ttm_buffer_object *ttm_bo)
 {
 	struct ttm_operation_ctx ctx = {
-		.interruptible = false
+		.interruptible = false,
+		.gfp_retry_mayfail = false,
 	};
 
 	if (ttm_bo->ttm) {
@@ -1294,6 +1297,7 @@ struct xe_bo *___xe_bo_create_locked(struct xe_device *xe, struct xe_bo *bo,
 	struct ttm_operation_ctx ctx = {
 		.interruptible = true,
 		.no_wait_gpu = false,
+		.gfp_retry_mayfail = true,
 	};
 	struct ttm_placement *placement;
 	uint32_t alignment;
@@ -1897,6 +1901,7 @@ int xe_bo_validate(struct xe_bo *bo, struct xe_vm *vm, bool allow_res_evict)
 	struct ttm_operation_ctx ctx = {
 		.interruptible = true,
 		.no_wait_gpu = false,
+		.gfp_retry_mayfail = true,
 	};
 
 	if (vm) {
@@ -2240,6 +2245,7 @@ int xe_bo_migrate(struct xe_bo *bo, u32 mem_type)
 	struct ttm_operation_ctx ctx = {
 		.interruptible = true,
 		.no_wait_gpu = false,
+		.gfp_retry_mayfail = true,
 	};
 	struct ttm_placement placement;
 	struct ttm_place requested;
@@ -2290,6 +2296,7 @@ int xe_bo_evict(struct xe_bo *bo, bool force_alloc)
 		.interruptible = false,
 		.no_wait_gpu = false,
 		.force_alloc = force_alloc,
+		.gfp_retry_mayfail = true,
 	};
 	struct ttm_placement placement;
 	int ret;
-- 
2.46.2