linux-kernel - Re: [RFD] Remove irq

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Date: Wed, 14 Feb 2024 22:39:09 +0100
From: Daniel Lezcano <daniel.lezcano@...aro.org>
To: Thomas Gleixner <tglx@...utronix.de>
Cc: LKML <linux-kernel@...r.kernel.org>, Ulf Hansson
 <ulf.hansson@...aro.org>, Daniel Bristot de Oliveira <bristot@...hat.com>
Subject: Re: [RFD] Remove irq_timings

Hi Thomas,

On 14/02/2024 22:17, Thomas Gleixner wrote:
> Daniel!
> 
> It's 7 years now that we merged irq timings into the kernel, but we
> still have zero users for this.
> 
> I'm tempted to declare this experiment failed and remove the whole thing
> for good.
> 
> Comments?

I worked on an irq cpuidle governor which had better results than the 
menu governor and equal than the teo governor. But I never succeed to 
have better results without putting some arbitrary when computing the 
next event.

At one moment, Daniel Bristot de Oliveira (Cc'ed) was thinking to may be 
use it for the deadline scheduler.

Ulf (Cc'ed) may be has a plan for the next event for the CPU cluster.

But if no one has plan to use it, there is no good reason to keep it and 
I'm fine if we remove it.

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