linux-kernel - Re: [PATCH] x86/split_lock: Restore warn mode (and add a new one) to avoid userspace regression

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Message-ID: <90ec75f7-f094-b7ac-a635-0c320cc94bcb@codeweavers.com>
Date:   Thu, 29 Sep 2022 12:23:58 -0500
From:   Paul Gofman <pgofman@...eweavers.com>
To:     Dave Hansen <dave.hansen@...el.com>,
        "Guilherme G. Piccoli" <gpiccoli@...lia.com>, tony.luck@...el.com,
        tglx@...utronix.de, linux-kernel@...r.kernel.org, x86@...nel.org
Cc:     mingo@...hat.com, bp@...en8.de, dave.hansen@...ux.intel.com,
        hpa@...or.com, luto@...nel.org, kernel-dev@...lia.com,
        kernel@...ccoli.net, Fenghua Yu <fenghua.yu@...el.com>,
        Joshua Ashton <joshua@...ggi.es>, Pavel Machek <pavel@...x.de>,
        Pierre-Loup Griffais <pgriffais@...vesoftware.com>,
        Melissa Wen <mwen@...lia.com>
Subject: Re: [PATCH] x86/split_lock: Restore warn mode (and add a new one) to
 avoid userspace regression

On 9/29/22 11:26, Dave Hansen wrote:
> Let's be precise here, though. It isn't that folks can't play. It's
> that we *intentionally* put something in place that kept them from
> playing.  They can play just fine after disabling split lock detection.

I guess that the statement that they can play is arguable. To do it, the 
player (even capabale and willing to go as far as tweaking kernel 
options, which alone may be a showstopper for the game to be called 
playable) should get aware that the issue they are having can be solved 
this way. IMO such level of involvement effectively means that a user 
who is not technically advanced and not perceiving troubleshooting Linux 
specific issues as a part of game play just can't play it.