linux-kernel - Re: [PATCH v7 08/12] platform/x86/intel/ifs: Add scan test support

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Date:   Mon, 09 May 2022 14:11:55 +0200
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Tony Luck <tony.luck@...el.com>, hdegoede@...hat.com,
        markgross@...nel.org
Cc:     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, tony.luck@...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 v7 08/12] platform/x86/intel/ifs: Add scan test support

On Fri, May 06 2022 at 15:54, Tony Luck wrote:
> From: Jithu Joseph <jithu.joseph@...el.com>
>
> In a core, the scan engine is shared between sibling cpus.
>
> When a Scan test (for a particular core) is triggered by the user,
> the scan chunks are executed on all the threads on the core using
> stop_core_cpuslocked.
>
> Scan may be aborted by some reasons. Scan test will be aborted in certain
> circumstances such as when interrupt occurred or cpu does not have enough
> power budget for scan. In this case, the kernel restart scan from the chunk
> where it stopped. Scan will also be aborted when the test is failed. In
> this case, the test is immediately stopped without retry.
>
> Reviewed-by: Dan Williams <dan.j.williams@...el.com>
> Signed-off-by: Jithu Joseph <jithu.joseph@...el.com>
> Co-developed-by: Tony Luck <tony.luck@...el.com>
> Signed-off-by: Tony Luck <tony.luck@...el.com>
> Acked-by: Hans de Goede <hdegoede@...hat.com>
> Reviewed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

Reviewed-by: Thomas Gleixner <tglx@...utronix.de>