linux-kernel - Re: [Linux Kernel 5.13 GA] ESXi Performance regression

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Date:   Thu, 5 Aug 2021 11:24:37 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Rahul Gopakumar <gopakumarr@...are.com>,
        Valentin Schneider <valentin.schneider@....com>,
        Abdul Anshad Azeez <aazees@...are.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "juri.lelli@...hat.com" <juri.lelli@...hat.com>,
        "vincent.guittot@...aro.org" <vincent.guittot@...aro.org>,
        Rajender M <manir@...are.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [Linux Kernel 5.13 GA] ESXi Performance regression

On Thu, 5 Aug 2021 17:05:00 +0200
Peter Zijlstra <peterz@...radead.org> 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.

-- Steve