Struct swap::processes::ProcessesGuard

pub struct ProcessesGuard {
    pids: Vec<Pid>,
}

Stops all the crosvm device processes during moving the guest memory to the staging memory.

While moving, we must guarantee that no one changes the guest memory contents. This supports devices in sandbox mode only.

We stop all the crosvm processes instead of the alternatives.

• Just stop vCPUs
  • devices still may works in the child process and write something to the guest memory.
• Use write protection of userfaultfd
  • UFFDIO_REGISTER_MODE_WP for shmem is WIP and not supported yet.
• devices::Suspendable::sleep()
  • Suspendable is not supported by all devices yet.

Fields

pids: Vec<Pid>

Implementations

impl ProcessesGuard

fn stop_the_world(&self) -> Result<()>

Stops all the crosvm processes by sending SIGSTOP signal.

fn continue_the_world(&self)

Resumes all the crosvm processes by sending SIGCONT signal.

Trait Implementations

impl Drop for ProcessesGuard

fn drop(&mut self)

Executes the destructor for this type.