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

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On Fri, Sep 27, 2019 at 01:12:40AM -0500, Dave Chiluk wrote:
On Wed, Sep 25, 2019 at 1:44 AM Greg KH <greg@xxxxxxxxx> wrote:

On Wed, Sep 25, 2019 at 12:53:48AM -0500, Dave Chiluk wrote:
> Commit de53fd7aedb1 ("sched/fair: Fix low cpu usage with high
> throttling by removing expiration of cpu-local slices") fixes a major
> performance issue for containerized clouds such as Kubernetes.
>
> Commit de53fd7aedb1 Fixes commit : 512ac999d275 ("sched/fair: Fix
> bandwidth timer clock drift condition").
>
> This should be applied to all stable kernels that applied commit
> 512ac999d275, and should probably be applied to all others as well.

As this commit isn't in a released kernel just yet, we should wait to
see what happens when it hits people's machines, right?

I think waiting till 5.4 is released would be irresponsible on this
one.  512ac999 was recently pushed back into many of the distro

The "released kernel" statement means 5.4-rc1 rather than 5.4, which is
just a few days away.

--
Thanks,
Sasha



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