Re: [PATCH 0/6] sched,delayacct: Some cleanups

[Thomas Gleixner]

On Wed, May 05 2021 at 12:59, Peter Zijlstra wrote:
> Due to:
>
>   https://lkml.kernel.org/r/0000000000001d43ac05c0f5c6a0@xxxxxxxxxx
>
> and general principle, delayacct really shouldn't be using ktime (pvclock also
> really shouldn't be doing what it does, but that's another story). This lead me
> to looking at the SCHED_INFO, SCHEDSTATS, DELAYACCT (and PSI) accounting hell.
>
> The rest of the patches are an attempt at simplifying all that a little. All
> that crud is enabled by default for distros which is leading to a death by a
> thousand cuts.
>
> The last patch is an attempt at default disabling DELAYACCT, because I don't
> think anybody actually uses that much, but what do I know, there were no ill
> effects on my testbox. Perhaps we should mirror
> /proc/sys/kernel/sched_schedstats and provide a delayacct sysctl for runtime
> frobbing.

Reviewed-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>