linux-kernel - Re: [PATCH] x86/apic: Handle missing global clockevent gracefully

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Message-ID: <CAD8Lp45S-0+b4ZjT=1xbq4ijFzQ4eC89QK=TVQn3A0ZKyeE0iA@mail.gmail.com>
Date:   Thu, 15 Aug 2019 13:02:07 +0800
From:   Daniel Drake <drake@...lessm.com>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     "Lendacky, Thomas" <Thomas.Lendacky@....com>,
        "Li, Aubrey" <aubrey.li@...ux.intel.com>,
        "x86@...nel.org" <x86@...nel.org>,
        "H . Peter Anvin" <hpa@...or.com>,
        Linux Kernel <linux-kernel@...r.kernel.org>,
        Endless Linux Upstreaming Team <linux@...lessm.com>,
        Jiri Slaby <jslaby@...e.cz>
Subject: Re: [PATCH] x86/apic: Handle missing global clockevent gracefully

On Mon, Aug 12, 2019 at 2:16 PM Daniel Drake <drake@...lessm.com> wrote:
> I can do a bit of testing on other platforms too. Are there any
> specific tests I should run, other than checking that the system boots
> and doesn't have any timer watchdog complaints in the log?

Tested this on 2 AMD platforms that were not affected by the crash here.
In addition to confirming that they boot fine without timer complaints
in the logs, I checked the calibrate_APIC_clock() result before and
after this patch. I repeated each test twice.

Asus E402YA (AMD E2-7015)
Before: 99811, 99811
After: 99812, 99812

Acer Aspire A315-21G (AMD A9-9420e)
Before: 99811, 99811
After: 99807, 99820

Those new numbers seem very close to the previous ones and I didn't
observe any problems.

Thanks
Daniel