Re: Potential scheduler regression

From: Peter Zijlstra
Date: Wed Jul 05 2017 - 12:49:18 EST

On Wed, Jul 05, 2017 at 11:42:46AM -0400, Ben Guthro wrote:
> Hello,
> I've been in the process of updating our kernel in our appliance VM
> from an old LTS kernel (4.1.y) to something a bit more modern (4.9.y)
> - and ran into a performance regression, when our QA team was running
> some regression suites.
> I bisect this behavior to the following commit, introduced in the 4.9
> merge window:

Could you test a later kernel that includes commit:

1ad3aaf3fcd2 ("sched/core: Implement new approach to scale select_idle_cpu()")