On 4/28/23 14:52, Thomas Hellström wrote:
Condsider the following call sequence: /* Upper layer */ dma_fence_begin_signalling(); lock(tainted_shared_lock); /* Driver callback */ dma_fence_begin_signalling(); ...
The "Upper layer" here currently being the drm scheduler and "Driver callback" being an xe scheduler callback.
While opt-in annotating the drm scheduler would achieve the same result, I think this patch should be considered anyway, as I don't think we will miss any true lockdep violations as a result of it.
/Thomas
