Tasks were wedging in kvm_async_pf_task_wait_schedule and surviving SIGKILL — maestro-web, systemd activation generators and agent sessions, a few a day, clearing only on reboot. The host pages this VM's memory out and a "page ready" wakeup gets dropped, leaving the task in an uninterruptible wait with no safe point to deliver a signal. no-kvmapf trades that for a synchronous vCPU stall on host page-in. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>