linux-kernel - Re: [PATCH 2/6] x86/bugs: Remove MDS command line

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Message-ID: <fa94df43-d2d7-478e-b74b-9afe6d624292@intel.com>
Date: Tue, 24 Sep 2024 15:34:28 -0700
From: Dave Hansen <dave.hansen@...el.com>
To: Daniel Sneddon <daniel.sneddon@...ux.intel.com>,
 Jonathan Corbet <corbet@....net>, Thomas Gleixner <tglx@...utronix.de>,
 Borislav Petkov <bp@...en8.de>, Peter Zijlstra <peterz@...radead.org>,
 Josh Poimboeuf <jpoimboe@...nel.org>, Ingo Molnar <mingo@...hat.com>,
 Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org
Cc: hpa@...or.com, linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
 pawan.kumar.gupta@...ux.intel.com
Subject: Re: [PATCH 2/6] x86/bugs: Remove MDS command line

On 9/24/24 15:31, Daniel Sneddon wrote:
> -	mds=		[X86,INTEL,EARLY]
> -			Control mitigation for the Micro-architectural Data
> -			Sampling (MDS) vulnerability.

As much as I'd love to remove old code, won't this surprise users if we
just take this away?

I suspect the _least_ we can do is warn folks if they use something that
we recently ripped out.  But the right thing is probably to keep the old
one around for at least a while. <sigh>