Exploring an Architecture-neutral KVM MMU

Explore the development and potential expansion of the TDP MMU in this 28-minute conference talk by David Matlack from Google. Delve into the history of the TDP MMU, introduced in 2020 to enhance the x86 KVM MMU's simplicity and scalability. Learn about its primary motivation to mitigate the impact of post-copy Live Migration on large VMs by enabling parallel fault handling. Discover the performance improvements and new features added since its introduction, including eager page splitting, deferred zapping, and lockless write-unprotection for dirty logging. Examine the growing need for similar scalability solutions in KVM-based ARM VMs offered by public cloud providers. Investigate the potential for making the TDP MMU architecture-neutral and the process of porting it to ARM, addressing scalability challenges across different architectures.