Hi all,
Still very much early stuff, still very much looking for initial thoughts and maybe some ideas how this could all be rolled out across drivers.
Full intro probably best from the RFC cover letter:
https://lore.kernel.org/amd-gfx/20200512085944.222637-1-daniel.vetter@ffwll....
Changes since last time around:
- might_sleep annotation has landed already, I split that out as a stand-alone
- now with an mm patch to improve direct reclaim annotations for mmu notifiers. This allows us to very easily catch issues in that area, no more need for exaustive testing and luck to make sure we're not leaving a GFP_NOFS or GPF_NOIO around which should be a GFP_ATOMIC
- kerneldoc that explains all the reasoning behind the annotations and priming, hopefully
Driver patches still largely just meant as examples to illustrate usage, but from various irc chats I think discussing them is really useful to gain clarity on the exact places the annotations should be put.
Cheers, Daniel
Daniel Vetter (18): mm: Track mmu notifiers in fs_reclaim_acquire/release dma-buf: minor doc touch-ups dma-fence: basic lockdep annotations dma-fence: prime lockdep annotations drm/vkms: Annotate vblank timer drm/vblank: Annotate with dma-fence signalling section drm/atomic-helper: Add dma-fence annotations drm/amdgpu: add dma-fence annotations to atomic commit path drm/scheduler: use dma-fence annotations in main thread drm/amdgpu: use dma-fence annotations in cs_submit() drm/amdgpu: s/GFP_KERNEL/GFP_ATOMIC in scheduler code drm/amdgpu: DC also loves to allocate stuff where it shouldn't drm/amdgpu/dc: Stop dma_resv_lock inversion in commit_tail drm/scheduler: use dma-fence annotations in tdr work drm/amdgpu: use dma-fence annotations for gpu reset code Revert "drm/amdgpu: add fbdev suspend/resume on gpu reset" drm/amdgpu: gpu recovery does full modesets drm/i915: Annotate dma_fence_work
Documentation/driver-api/dma-buf.rst | 18 +- drivers/dma-buf/dma-buf.c | 6 +- drivers/dma-buf/dma-fence.c | 202 ++++++++++++++++++ drivers/dma-buf/dma-resv.c | 4 + drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 5 + drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 22 +- drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c | 2 +- drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c | 2 +- drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c | 2 +- drivers/gpu/drm/amd/amdgpu/atom.c | 2 +- .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 18 +- drivers/gpu/drm/amd/display/dc/core/dc.c | 4 +- drivers/gpu/drm/drm_atomic_helper.c | 16 ++ drivers/gpu/drm/drm_vblank.c | 8 +- drivers/gpu/drm/i915/i915_sw_fence_work.c | 3 + drivers/gpu/drm/scheduler/sched_main.c | 11 + drivers/gpu/drm/vkms/vkms_crtc.c | 8 +- include/linux/dma-fence.h | 13 ++ mm/mmu_notifier.c | 7 - mm/page_alloc.c | 23 +- 20 files changed, 341 insertions(+), 35 deletions(-)