Question about futex

I'm wondering why we have no 64 bit futex? (unless it was added since my kernel.) I would like to wait on a pointer, right now I have a timeout to avoid deadlock if only the upper half is changed during a race, but this is highly sub-optimal for me.

Futex Question (64 bits?)

he pointer not futexed is modified between the time the system call is entered and executed. This creates a situation that prevents the locking_ptr from being realtime safe unless the timeout is set at a very low value. Furthermore, this causes excess CPU usage due to spurious wakeups. Thank you, Ry

Question about futex

I'm wondering why we have no 64 bit futex? (unless it was added since my kernel.) I would like to wait on a pointer, right now I have a timeout to avoid deadlock if only the upper half is changed during a race, but this is highly sub-optimal for me.

Futex Question (64 bits?)

not futexed is modified between the time the system call is entered and executed. This creates a situation that prevents the locking_ptr from being realtime safe unless the timeout is set at a very low value. Furthermore, this causes excess CPU usage due to spurious wakeups. Thank you, Ryan Nicholl