On Wed, 17 May 2023 11:26:50 -0400 Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx> wrote: > This prototype extends struct rseq with a new sched_state field, which > contains a "on-cpu" flag kept up-to-date by the scheduler. > > It is meant to be used by userspace adaptative mutexes to decide between > busy-wait and futex wait system call (releasing the CPU) behaviors based > on the current state of the mutex owner. Woot! I'm so glad I talked Jon into hanging around for André's spurious talk. He's the one that brought up rseq (as he mentioned in his article), and I guess you read that :-) Unfortunately, I'm in the process of a lot of trips and meetings/presentations over the next few weeks, and I will not be able to look into this. But I hope that André could test it out. Cheers! -- Steve
