siftDown(arr, n, i);
The main rule for data access is max(CPL, RPL) ≤ DPL. For code transfers, the rules get considerably more complex -- conforming segments, call gates, and interrupt gates each have different privilege and state validation logic. If all these checks were done in microcode, each segment load would need a cascade of conditional branches: is it a code or data segment? Is the segment present? Is it conforming? Is the RPL valid? Is the DPL valid? This would greatly bloat the microcode ROM and add cycles to every protected-mode operation.
，这一点在heLLoword翻译官方下载中也有详细论述
But for most developers working on personal projects or small teams, the 1Password or Keychain approach hits a sweet spot: minimal setup, no infrastructure to manage, and you’re probably already paying for the tools.
After an rpm-ostree reset to cancel local modifications, the update service will be able to apply the new image automatically at the next check (every 4 hours by default).