2 ms·

How is that any different from hibernation?

• jonhohle 5y ago
  Memory isn’t snapshotted and dumped, then restored by the OS in a way that user space is largely unaware. macOS/iOS has adopted a model of giving apps an opportunity to persist their own state before being terminated (which may be eagerly to reduce memory pressure or power consumption, for example) and then have the application restore its own state in whatever way is appropriate. Outside of containers, hibernation almost needs to be a system-wide operation, which makes it inappropriate for OS updates, restoring from crashes (which, I suppose is what Phantom OS is trying to resolve), or hardware changes.
  • zozbot234 5y ago
    Note that "containers" is basically kernel-implemented namespaces, which is why a containerized app can be checkpointed and restored independently: they can preserve the semantics of kernel resources across runs. You could have just about any arbitrary app running in a "container" with it being none-the-wiser about it: it doesn't necessarily impact userspace support.