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Date:   Thu, 21 May 2020 15:11:37 +0200
From:   Marek Vasut <>
To:     David Miller <>,
Subject: Re: [PATCH V6 00/20] net: ks8851: Unify KS8851 SPI and MLL drivers

On 5/17/20 9:30 PM, David Miller wrote:
> From: Andrew Lunn <>
> Date: Sun, 17 May 2020 21:16:35 +0200
>>> Nevertheless I was going to repeat the performance measurements on a
>>> recent kernel but haven't gotten around to that yet because the
>>> measurements need to be performed with CONFIG_PREEMPT_RT_FULL to
>>> be reliable (a vanilla kernel is too jittery), so I have to create
>>> a new branch with RT patches on the test machine, which is fairly
>>> involved and time consuming.
>> I assume you will then mainline the changes, so you don't need to do
>> it again? That is the problem with doing development work on a dead
>> kernel.
> I think the limitation is outside of his control as not all of the RT
> patches are in mainline yet.

So how shall we proceed here?

Some basic measurement results are here, for the reference [1].


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