Re: [2/2] drm/ttm: make TT creation purely optional v3

On 2020-06-29 5:19 p.m., Christian König wrote:

We only need the page array when the BO is about to be accessed.

So not only populate, but also create it on demand.

v2: move NULL check into ttm_tt_create() v3: fix the occurrence in ttm_bo_kmap_ttm as well

This broke amdgpu userptr functionality for me, in particular all GL_AMD_pinned_memory piglit tests, e.g.

.../piglit/bin/amd_pinned_memory decrement-offset -auto -fbo Offset is decremented, no wait. Mesa: User error: GL_INVALID_OPERATION in glBufferData [...] Unexpected GL error: GL_INVALID_OPERATION 0x502 (Error at tests/spec/amd_pinned_memory/test.c:214) PIGLIT: {"result": "fail" }