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-rw-r--r--src/gallium/winsys/amdgpu/drm/amdgpu_winsys.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/src/gallium/winsys/amdgpu/drm/amdgpu_winsys.c b/src/gallium/winsys/amdgpu/drm/amdgpu_winsys.c
index 6511c4855d8..da9371deea0 100644
--- a/src/gallium/winsys/amdgpu/drm/amdgpu_winsys.c
+++ b/src/gallium/winsys/amdgpu/drm/amdgpu_winsys.c
@@ -331,8 +331,10 @@ static bool do_winsys_init(struct amdgpu_winsys *ws, int fd)
ws->info.gart_size = gtt.heap_size;
ws->info.vram_size = vram.heap_size;
ws->info.vram_vis_size = vram_vis.heap_size;
- /* The kernel can split large buffers, so we can do large allocations. */
- ws->info.max_alloc_size = MAX2(ws->info.vram_size, ws->info.gart_size) * 0.9;
+ /* The kernel can split large buffers in VRAM but not in GTT, so large
+ * allocations can fail or cause buffer movement failures in the kernel.
+ */
+ ws->info.max_alloc_size = MIN2(ws->info.vram_size * 0.9, ws->info.gart_size * 0.7);
/* convert the shader clock from KHz to MHz */
ws->info.max_shader_clock = ws->amdinfo.max_engine_clk / 1000;
ws->info.max_se = ws->amdinfo.num_shader_engines;