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From: Greg KH <gregkh@linuxfoundation.org>
To: Dave Chiluk <chiluk+linux@indeed.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
	Ben Segall <bsegall@google.com>, Phil Auld <pauld@redhat.com>,
	stable@vger.kernel.org, Sasha Levin <sashal@kernel.org>,
	Ingo Molnar <mingo@redhat.com>
Subject: Re: Please backport de53fd7aedb1 : sched/fair: Fix low cpu usage with high throttling by removing expiration of cpu-local slices
Date: Mon, 4 Nov 2019 12:08:32 +0100
Message-ID: <20191104110832.GE1945210@kroah.com> (raw)
In-Reply-To: <CAC=E7cV2DzpLOz_RaFzBKCN3cEntB7BPLGL9PaGZ2LYb6dc0Jw@mail.gmail.com>

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

  reply index

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-25  5:53 Dave Chiluk
2019-09-25  6:44 ` Greg KH
2019-09-27  6:12   ` Dave Chiluk
2019-09-27  6:24     ` Greg KH
2019-09-27 13:13     ` Sasha Levin
2019-10-03  5:15       ` Dave Chiluk
2019-10-03  6:51         ` Greg KH
2019-10-18 20:23           ` Dave Chiluk
2019-10-18 20:53             ` Peter Zijlstra
2019-10-22 14:55               ` Dave Chiluk
2019-11-04 11:08                 ` Greg KH [this message]
2019-11-08 18:06                   ` [PATCH v4.14.y 1/2] " Dave Chiluk
2019-11-08 20:15                   ` [PATCH v4.14.y 0/2] Please backport de53fd7aedb1 : " Dave Chiluk
2019-11-08 20:15                     ` [PATCH v4.14.y 1/2] " Dave Chiluk
2019-11-08 20:15                     ` [PATCH v4.14.y 2/2] sched/fair: Fix -Wunused-but-set-variable warnings Dave Chiluk
2019-11-11  9:18                     ` [PATCH v4.14.y 0/2] Please backport de53fd7aedb1 : sched/fair: Fix low cpu usage with high throttling by removing expiration of cpu-local slices Greg KH
2019-11-08 20:20                   ` [PATCH v4.19.y " Dave Chiluk
2019-11-08 20:20                     ` [PATCH v4.19.y 1/2] " Dave Chiluk
2019-11-08 20:20                     ` [PATCH v4.19.y 2/2] sched/fair: Fix -Wunused-but-set-variable warnings Dave Chiluk
2019-11-11  9:19                     ` [PATCH v4.19.y 0/2] Please backport de53fd7aedb1 : sched/fair: Fix low cpu usage with high throttling by removing expiration of cpu-local slices Greg KH

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