Re: [PATCH] sched/psi: create /proc/pressure and /proc/pressure/{io|memory|cpu} only when psi enabled

[Johannes Weiner]

On Wed, Jan 08, 2020 at 02:55:26PM +0100, Peter Zijlstra wrote:
> On Wed, Dec 18, 2019 at 08:38:18PM +0800, Wang Long wrote:
> > when CONFIG_PSI_DEFAULT_DISABLED set to N or the command line set psi=0,
> > I think we should not create /proc/pressure and
> > /proc/pressure/{io|memory|cpu}.
> > 
> > In the future, user maybe determine whether the psi feature is enabled by
> > checking the existence of the /proc/pressure dir or
> > /proc/pressure/{io|memory|cpu} files.
> 
> Works for me; Johannes?

Seems reasonable, and the patch looks good to me.

Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>