3 ms·

Owner tracking and priority inheritance, anyone?

• jimmyed 4y ago
  To prevent priority inversion?
• cryptonector 4y ago
  You can't have that with futexes. That would require a system call for every lock and unlock, not just for contended ones. It's a trade-off.
  • EdSchouten 4y ago
    That’s not true. Just create a 32 or 64 bit futex, and use that to let threads write their thread ID into it. https://www.kernel.org/doc/Documentation/pi-futex.txt https://www.kernel.org/doc/Documentation/pi-futex.txt
    • cryptonector 4y ago
      But the whole point here is to have teeny tiny futexes.