Quoting Patchwork (2018-03-26 17:53:44) > Test gem_userptr_blits: > Subgroup coherency-unsync: > pass -> INCOMPLETE (shard-hsw) Forgot that obj->userptr.mn may not exist. > Subgroup dmabuf-sync: > pass -> DMESG-WARN (shard-hsw) But this is the tricky lockdep one, warning of the recursion from gup into mmu_invalidate_range, i.e. down_read(&i915_mmu_notifier->sem); down_read(&mm_struct->mmap_sem); gup(); down_write(&i915_mmut_notifier->sem); That seems a genuine deadlock... So I wonder how we managed to get a lockdep splat and not a dead machine. Maybe gup never triggers the recursion for our set of flags? Hmm. -Chris _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
