Hello All, The implementation of critical_enter and critical_exit changed between freebsd 5 and freebsd 6. In the newer implemtnation, the code checks if td_critnest is 1 and if it is sets it to zero, then checks if the thread owes a preempt. If so, it increments td_critnest by 1 before grabbing a lock and then decrements it back to zero. I can't figure out why it does this. The freebsd 5 implementation seems straightforward where we check if the thread owes a preempt and if so we switch to the new thread. Can anyone help me with this?
Thanks Ravi _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[email protected]"
