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

[Peter Zijlstra]

On Thu, Jan 09, 2020 at 10:30:02AM -0500, Johannes Weiner wrote:
> 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>

Thanks!