From: Ingo Molnar <mingo@kernel.org>
To: "Jürgen Groß" <jgross@suse.com>
Cc: linux-kernel@vger.kernel.org, x86@kernel.org,
virtualization@lists.linux.dev, kvm@vger.kernel.org,
linux-hwmon@vger.kernel.org, linux-block@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Ajay Kaher <ajay.kaher@broadcom.com>,
Alexey Makhalov <alexey.makhalov@broadcom.com>,
Broadcom internal kernel review list
<bcm-kernel-feedback-list@broadcom.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
xen-devel@lists.xenproject.org, Jean Delvare <jdelvare@suse.com>,
Guenter Roeck <linux@roeck-us.net>,
Denis Efremov <efremov@linux.com>, Jens Axboe <axboe@kernel.dk>
Subject: Re: [PATCH 0/5] x86: Cleanups around slow_down_io()
Date: Tue, 16 Dec 2025 14:48:52 +0100 [thread overview]
Message-ID: <aUFjRDqbfWMsXvvS@gmail.com> (raw)
In-Reply-To: <bff8626d-161e-4470-9cbd-7bbda6852ec3@suse.com>
* Jürgen Groß <jgross@suse.com> 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. :-)
Whatever side effects it still may have, I very strongly doubt it has
anything to do with the original purpose of IO delays...
> In cases 2-4 I'd still like to have patch 1 of my series applied, as it will
> make paravirt rework easier.
Sure.
Thanks,
Ingo
next prev parent reply other threads:[~2025-12-16 13:49 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-26 16:20 [PATCH 0/5] x86: Cleanups around slow_down_io() Juergen Gross
2025-11-26 16:20 ` [PATCH 1/5] x86/paravirt: Replace io_delay() hook with a bool Juergen Gross
2025-11-26 17:08 ` [PATCH 0/5] x86: Cleanups around slow_down_io() Guenter Roeck
2025-12-14 8:05 ` Ingo Molnar
2025-12-15 6:36 ` Jürgen Groß
2025-12-16 13:48 ` Ingo Molnar [this message]
2025-12-16 13:55 ` Jürgen Groß
2025-12-16 15:32 ` H. Peter Anvin
2025-12-16 19:59 ` David Laight
2025-12-16 21:50 ` H. Peter Anvin
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