Re: [stable] Removing or restricting timer_stats

[Greg KH <greg@kroah.com>]

On Wed, Apr 19, 2017 at 07:54:34AM -0700, Kees Cook wrote:
> On Wed, Apr 19, 2017 at 4:50 AM, Greg KH <greg@kroah.com> wrote:
> > On Tue, Apr 18, 2017 at 03:25:05AM +0100, Ben Hutchings wrote:
> >> The timer_stats feature was removed upstream by:
> >>
> >> commit dfb4357da6ddbdf57d583ba64361c9d792b0e0b1
> >> Author: Kees Cook <keescook@chromium.org>
> >> Date:   Wed Feb 8 11:26:59 2017 -0800
> >>
> >>     time: Remove CONFIG_TIMER_STATS
> >>
> >> I'm hesitant to propose removing a feature in stable, even if it is
> >> redundant.  What I've done for Debian stable is to restrict it to the
> >> initial pid namespace (see attached).  Would that be a reasonable
> >> alternative change for stable branches?
> >
> > I don't mind removing things in stable as that's what happened in
> > Linus's tree, and it was removed for a reason.  We've done it before,
> > and I'm more hesitant to apply something that works a bit
> > "differently".
> >
> > Kees, any objection for me just taking the "full" patch in the stable
> > kernels?
> 
> Arjan said it would break powertop, IIRC.

So we broke it in 4.11?  That doesn't seem to sound reasonable, how are
you getting away with that?  :)

thanks,

greg k-h