On 10/01/2016 02:47 AM, Thomas Gleixner wrote:
On Fri, 30 Sep 2016, Waiman Long wrote:
+ WRITE_ONCE(state->owner, current);
+ preempt_disable();
+ for (;;) {
+ ret = futex_trylock(uaddr, vpid,&uval, true);
Did you actually read what I said? You CANNOT access user
On Fri, 30 Sep 2016, Waiman Long wrote:
> + WRITE_ONCE(state->owner, current);
> + preempt_disable();
> + for (;;) {
> + ret = futex_trylock(uaddr, vpid, &uval, true);
Did you actually read what I said? You CANNOT access userspace in a preempt
disabled region without disabl
A new futex implementation called throughput-optimized (TP) futexes
is introduced. The goal of this new futex type is to maximize locking
throughput at the expense of fairness and deterministic latency. Its
throughput is higher than that of the wait-wake futexes especially
on systems with a large n
