Re: [tip:sched/core] [sched/fair] 089d84203a: pts.schbench.32.usec,_99.9th_latency_percentile 52.4% regression

From: Peter Zijlstra
Date: Thu Dec 18 2025 - 03:45:16 EST


On Thu, Dec 18, 2025 at 12:59:53PM +0800, kernel test robot wrote:
>
>
> Hello,
>
> kernel test robot noticed a 52.4% regression of pts.schbench.32.usec,_99.9th_latency_percentile on:
>
>
> commit: 089d84203ad42bc8fd6dbf41683e162ac6e848cd ("sched/fair: Fold the sched_avg update")
> https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git sched/core

Well, that obviously wasn't the intention. Let me pull that patch :/