On Tue, 2010-11-16 at 13:08 -0800, Jeremy Fitzhardinge wrote: > Maintain a flag in both LSBs of the ticket lock which indicates whether > anyone is in the lock slowpath and may need kicking when the current > holder unlocks. The flags are set when the first locker enters > the slowpath, and cleared when unlocking to an empty queue.
So here you say you set both LSBs in order to keep head == tail working, but the code seems to suggest you only use the tail LSB. I think I see why using only one LSB is sufficient, but some consistency would be nice :-) _______________________________________________ Virtualization mailing list [email protected] https://lists.linux-foundation.org/mailman/listinfo/virtualization
