* Peter Zijlstra <pet...@infradead.org> wrote:
> On Sun, Oct 04, 2020 at 05:21:08PM +0100, Mel Gorman wrote:
> > On Sun, Oct 04, 2020 at 09:27:16PM +0800, kernel test robot wrote:
> > > Greeting,
> > >
> > > FYI, we noticed a -30.8% regression of netperf.Throughput_Mbps due to
> > > commit:
> > >
> > >
> > > commit: fcf0553db6f4c79387864f6e4ab4a891601f395e ("sched/fair: Remove
> > > meaningless imbalance calculation")
> > > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
> > >
> >
> > This commit was the start of a series that made large changes to load
> > balancing. The series was not bisect-safe and has since been reconciled
> > with the NUMA balancing. Any workload with a potential load balancing
> > problem has to be checked against the latest kernel to see if the problem
> > persists there. If it does, then tip/sched/core should be checked or
> > 5.10-rc1 when it comes out as tip has a few more LB changes pending.
>
> What Mel said ;-)
Basically it would be nice to test either the following commit directly
(which is the latest relevant sched/core commit):
233e7aca4c8a: ("sched/fair: Use dst group while checking imbalance for NUMA
balancer")
Or a -next version that includes these commits.
Thanks,
Ingo
