Re: [Linux Kernel 5.13 GA] ESXi Performance regression

[Peter Zijlstra]

On Thu, Aug 05, 2021 at 11:24:37AM -0400, Steven Rostedt wrote:
> On Thu, 5 Aug 2021 17:05:00 +0200
> Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
> 
> > > Hmm, is this a user space breakage?  
> > 
> > All those files were under CONFIG_SCHED_DEBUG and a !DEBUG build would
> > not have them to begin with.
> 
> But you can have a config with CONFIG_DEBUG_FS disabled, and DEBUG and
> SCHED_DEBUG enabled, which means that there's now configs where this
> value is no longer available.

You already had that, notably: CONFIG_SCHED_DEBUG=n.

These have always been debug knobs, if you touch them you get to keep
the pieces.