Hey all, It has come to my attention that there is a pretty serious bug in i915 on Broadwell for 4.10 and 4.11 released kernels, this means it has probably been in the intel-next tree for at least 4 if not 6 months, and gone unnoticed. How does something like this get into Linus tree, and remain in the Linus tree for two releases? Back when we started doing continuous merging into drm-intel-next, I realised this was going to be a problem, and was told it wouldn't as review and CI would catch things. The problem as I see it, is the dump and run mentality has taken hold inside Intel, and there is a lack of ownership of bugs or areas of the kernel. There seems to be a lack of caring by internal engineers about anything not in their direct line of sight. This needs to change, engineers contributing to i915 need to start owning and fixing their code, not just dumping and moving on. The problem I have with the long tail of commits going into Linus tree is that reverting is really difficult 3-4 weeks later since usually things have been built on top of the pile of crap that is causing the problems, However since this probably won't happen, we need to start relying on CI probably to trap things, I'm asking Daniel and other committers to drm-intel-next to start enforcing that complete intel-gpu-tools tests are available before any commits that affect things at lowlevel across the board (i.e. gem, gtt programming, shrinker), and also for any new UABI for features that are using things like 48-bit addressing etc. I don't want any code being merged to drm-intel-next unless the developer has done a complete intel-gpu-tools regression run on at least two major platforms themselves, without relying on CI. Please forward this email to any Intel management/engineering that are off this list, but having a complete platform 2 generations old broken for 6 months isn't acceptable and someone needs to own that, and ensure stable gets patches ASAP. Dave. _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
