On Thu, Sep 17, 2020 at 11:28:19AM +0100, Lorenzo Pieralisi wrote: > Unfortunately if we merge this patch we _do_ know from this thread > that userspace will suffer from a perf regression on TX2. > > Either we ignore it or we write some code to prevent it > (ie first step make arch_can_pci_mmap_wc() return 0 on TX2 - > possibly using the arm64 errata detection mechanism). If anyone complains they can send the change to arch_can_pci_mmap_wc() - I'm pretty sure nobody will complain due to mlx5 Jason
