Every experiment behind the shared-base gVisor memory work

Author&rsquo;s note: this post&rsquo;s text was drafted with assistance from Fable 5. TL;DR Seventeen experiments, three layers: the raw Linux primitive, gVisor&rsquo;s MemoryFile internals, and real runsc on real KVM. All runnable from the published code. Shared-base restore is a measured 5.5x physical-memory flatten (measured by PSS against a paired no-base baseline, N=8, through the runsc CLI).…