netdev - Re: Backport - xen-netback: correctly schedule rate-limited queues

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Date:   Mon, 17 Jul 2017 21:01:33 +0200
From:   Jean-Louis Dupond <jean-louis@...ond.be>
To:     netdev@...r.kernel.org
Subject: Re: Backport - xen-netback: correctly schedule rate-limited queues

Hi,

Any chance on this? As it gives a possible freeze on all Xen machines 
that use rate-limiting, I really think we should backport this straight 
forward patch.

Thanks
Jean-Louis


Op 11-07-17 om 11:47 schreef Jean-Louis Dupond:
> Hi All,
>
> Is there a chance the following patch 
> (https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/?id=dfa523ae9f2542bee4cddaea37b3be3e157f6e6b) 
> can get backported to the current LTS kernels (including 4.9.x)?
>
> The commit message might not be completely showing the impact of this 
> issue (which is fixed with the patch).
>
> Without the patch, ksoftirqd goes nuts if you upload on a domU with 
> rate-limiting enabled.
> This not only causing high cpu load, but sometimes also a complete 
> hang of the hypervisor.
>
> As the patch is quite important and trivial, I think it would be good 
> to have it backported :)
>
> Thanks
> Jean-Louis