On 06/07/20 21:00, Peter Zijlstra wrote: > On Tue, Jul 07, 2020 at 03:36:13AM +0800, Chen Yu wrote: >> It was found that recently the flags of sched domain could >> not be customized via sysctl, which might make it a little >> inconenient for performance tuning/debugging. > > What specific goals do you have? This is a debug interface.
Also, while the update_top_cache_domain() call on sysctl write may work, you're back to square one as soon as you go through a hotplug cycle, which is icky. That said, I second Peter in that I'm curious as to what you're really using this interface for. Manually hacking the default / arch topology flags is a bit tedious, but it's doable.
