Re: [PATCH 0/5] x86: Cleanups around slow_down_io()

[H. Peter Anvin]

On December 16, 2025 5:55:54 AM PST, "Jürgen Groß" <jgross@xxxxxxxx> wrote:
>On 16.12.25 14:48, Ingo Molnar wrote:
>> 
>> * Jürgen Groß <jgross@xxxxxxxx> wrote:
>> 
>>>> CPUs anymore. Should it cause any regressions, it's easy to bisect to.
>>>> There's been enough changes around all these facilities that the
>>>> original timings are probably way off already, so we've just been
>>>> cargo-cult porting these to newer kernels essentially.
>>> 
>>> Fine with me.
>>> 
>>> Which path to removal of io_delay would you (and others) prefer?
>>> 
>>> 1. Ripping it out immediately.
>> 
>> I'd just rip it out immediately, and see who complains. :-)
>
>I figured this might be a little bit too evil. :-)
>
>I've just sent V2 defaulting to have no delay, so anyone hit by that
>can still fix it by applying the "io_delay" boot parameter.
>
>I'll do the ripping out for kernel 6.21 (or whatever it will be called).
>
>
>Juergen

Ok, I'm going to veto ripping it out from the real-mode init code, because I actually know why it is there :) ... and that code is pre-UEFI legacy these days anyway.

Other places... I don't care :)