Re: Please backport de53fd7aedb1 : sched/fair: Fix low cpu usage with high throttling by removing expiration of cpu-local slices

[Greg KH <gregkh@linuxfoundation.org>]

On Tue, Oct 22, 2019 at 09:55:58AM -0500, Dave Chiluk wrote:
> On Fri, Oct 18, 2019 at 3:53 PM Peter Zijlstra <peterz@infradead.org> wrote:
> >
> > On Fri, Oct 18, 2019 at 03:23:02PM -0500, Dave Chiluk wrote:
> > > @Ben @Ingo @Peter
> > > Can you please please ack this backport request?
> > >
> > > Thank you,
> > > Dave Chiluk
> > >
> > > On Thu, Oct 3, 2019 at 1:51 AM Greg KH <gregkh@linuxfoundation.org> wrote:
> > > >
> > > > On Thu, Oct 03, 2019 at 12:15:02AM -0500, Dave Chiluk wrote:
> > > > > @Greg KH, Qian Cai's compiler warning fix has now been integrated into
> > > > > Linus' tree as commit: 763a9ec06c409
> > > > >
> > > > > Both de53fd7aedb1 and 763a9ec06c40 are now apart of v5.4-rc1.  Can you
> > > > > please queue up these fixes for backport to all stable kernels.
> > > >
> > > > I need an ack from the scheduler maintainers that this is ok to do so...
> >
> > Sure I suppose, but what makes this commit special? Don't you normally
> > take just about anything?
> 
> I think this is more a matter of me being a relatively unknown in the
> scheduler space, and Greg is just being responsible as this looks like
> a pretty scary fix.
> 
> In reality, I probably should have just added "Cc:
> stable@vger.kernel.org" to the sign-off area of the initial commit and
> this conversation wouldn't have been necessary.

That is very true :)

I just tried to apply this to 5.3, 4.19, and 4.14, and it only applies
cleanly to 5.3.y.  Can you please provide backports for 4.19.y and
4.14.y so that I can queue it up there?

thanks,

greg k-h