On 04/12/2019 12:41 PM, Ingo Molnar wrote: > * Waiman Long <[email protected]> wrote: > >>> BTW, the v3 patch that I posted yesterday should work fine as long as >>> CONFIG_RWSEM_SPIN_ON_OWNER is defined. >>> >>> Cheers, >>> Longman >>> >> Oh, I see that the WIP.locking/core is currently merged into master. I >> would say rwsem part1 patchset and patch 1 of part2 are stable. So I >> would suggest merging those into the the master will be good. The rests >> are still under review until I get an OK from Peter. If they miss the >> next merge window and have to postpone to 5.3, I am fine with that. > So beyond the primary constraint of PeterZ OK-ing it all, there's also > these two scalability regression reports from the ktest bot: > > [locking/rwsem] 1b94536f2d: stress-ng.bad-altstack.ops_per_sec -32.7% > regression
A regression due to the lock handoff patch is kind of expected, but I will into why there is such a large drop. > [locking/rwsem] adc32e8877: will-it-scale.per_thread_ops -21.0% regression Will look into that also. Thanks, Longman
