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Message-ID: <CAD8Lp4577Vd109p2ax22WtXUH=bEXYP8o8Ak5Gk9texCw9+x5Q@mail.gmail.com>
Date: Fri, 28 Jun 2019 15:26:07 +0800
From: Daniel Drake <drake@...lessm.com>
To: Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>
Cc: hpa@...or.com, x86@...nel.org,
Linux Upstreaming Team <linux@...lessm.com>,
Linux Kernel <linux-kernel@...r.kernel.org>,
"Wysocki, Rafael J" <rafael.j.wysocki@...el.com>,
Hans de Goede <hdegoede@...hat.com>
Subject: Re: [PATCH] x86: skip PIT initialization on modern chipsets
Oops, please also add a reference to the main thread:
On Fri, Jun 28, 2019 at 3:23 PM Daniel Drake <drake@...lessm.com> wrote:
> Detect modern setups where we have no need for the PIT (e.g. where
> we already know the TSC and LAPIC timer frequencies, so no need
> to calibrate them against the PIT), and skip initialization PIT in
> such cases.
>
> Skip the IO-APIC timer-checking code when we don't have a PIT
> to test against (this was causing the panic).
Link: https://lore.kernel.org/lkml/CAD8Lp45fedoPLnK=UmUhhtkjy5u2h04sYKrx3U+m04U6FpVZ4A@mail.gmail.com
> Tested-by: Daniel Drake <drake@...lessm.com>
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