linux-kernel - Re: [PATCH v5 07/10] platform/x86/intel/ifs: Add scan test support

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Date:   Thu, 05 May 2022 11:01:27 +0200
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     "Luck, Tony" <tony.luck@...el.com>, hdegoede@...hat.com,
        markgross@...nel.org, mingo@...hat.com, bp@...en8.de,
        dave.hansen@...ux.intel.com, x86@...nel.org, hpa@...or.com,
        corbet@....net, gregkh@...uxfoundation.org,
        andriy.shevchenko@...ux.intel.com, jithu.joseph@...el.com,
        ashok.raj@...el.com, rostedt@...dmis.org, dan.j.williams@...el.com,
        linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
        platform-driver-x86@...r.kernel.org, patches@...ts.linux.dev,
        ravi.v.shankar@...el.com
Subject: Re: [PATCH v5 07/10] platform/x86/intel/ifs: Add scan test support

On Thu, May 05 2022 at 10:28, Peter Zijlstra wrote:
> On Thu, May 05, 2022 at 01:15:07AM +0200, Thomas Gleixner wrote:
>> We don't have stomp_cpumask() today, but that's trivial enough to
>> implement.
>
> I don't think we want to gift people a random cpumask stop_machine(),

Fair enough.

> but here's one that stops a core. It runs the @fn on every cpu since I
> thought to have understood that was the requirement for this muck.

Yes.

> *completely* untestededed.

Looks about right neverthelessesseess.