Re: [PATCH v4] sched/wake_q: Reduce reference counting for special users

2019-01-22 Thread Peter Zijlstra
On Mon, Jan 21, 2019 at 08:02:18AM -0800, Davidlohr Bueso wrote: > Hi - considering that the wake_q patches were picked up for tip/urgent, can > this one make it in as well? Ah, here it is. Yes, got it now. I was actually wondering what happened, but couldn't find it in a hurry. All sorted now.

Re: [PATCH v4] sched/wake_q: Reduce reference counting for special users

2019-01-21 Thread Davidlohr Bueso
Hi - considering that the wake_q patches were picked up for tip/urgent, can this one make it in as well? Thanks, Davidlohr On Tue, 18 Dec 2018, Waiman Long wrote: On 12/18/2018 02:53 PM, Davidlohr Bueso wrote: Some users, specifically futexes and rwsems, required fixes that allowed the caller

Re: [PATCH v4] sched/wake_q: Reduce reference counting for special users

2018-12-18 Thread Waiman Long
On 12/18/2018 02:53 PM, Davidlohr Bueso wrote: > Some users, specifically futexes and rwsems, required fixes > that allowed the callers to be safe when wakeups occur before > they are expected by wake_up_q(). Such scenarios also play > games and rely on reference counting, and until now were > pivo

[PATCH v4] sched/wake_q: Reduce reference counting for special users

2018-12-18 Thread Davidlohr Bueso
Some users, specifically futexes and rwsems, required fixes that allowed the callers to be safe when wakeups occur before they are expected by wake_up_q(). Such scenarios also play games and rely on reference counting, and until now were pivoting on wake_q doing it. With the wake_q_add() call bein