linux-kernel - Re: [tip:x86/pti] x86/speculation/l1tf: Drop the swap storage limit restriction when l1tf=off

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Message-ID: <20181211090056.GA30493@gmail.com>
Date:   Tue, 11 Dec 2018 10:00:56 +0100
From:   Ingo Molnar <mingo@...nel.org>
To:     linux-mm@...ck.org, mhocko@...e.com, bp@...e.de,
        pasha.tatashin@...een.com, tglx@...utronix.de,
        linux-kernel@...r.kernel.org, dave.hansen@...el.com,
        torvalds@...ux-foundation.org, hpa@...or.com, jkosina@...e.cz,
        ak@...ux.intel.com
Cc:     linux-tip-commits@...r.kernel.org
Subject: Re: [tip:x86/pti] x86/speculation/l1tf: Drop the swap storage limit
 restriction when l1tf=off


* tip-bot for Michal Hocko <tipbot@...or.com> wrote:

> Commit-ID:  f4abaa98c4575cc06ea5e1a593e3bc2c8de8ef48
> Gitweb:     https://git.kernel.org/tip/f4abaa98c4575cc06ea5e1a593e3bc2c8de8ef48
> Author:     Michal Hocko <mhocko@...e.com>
> AuthorDate: Tue, 13 Nov 2018 19:49:10 +0100
> Committer:  Thomas Gleixner <tglx@...utronix.de>
> CommitDate: Mon, 10 Dec 2018 22:07:02 +0100
> 
> x86/speculation/l1tf: Drop the swap storage limit restriction when l1tf=off

> [ tglx: Folded the documentation delta change ]

> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -2095,6 +2095,9 @@
>  			off
>  				Disables hypervisor mitigations and doesn't
>  				emit any warnings.
> +				It also drops the swap size and available
> +				RAM limit restriction on both hypervisor and
> +				bare metal.

>  
>  			Default is 'flush'.
>  
> diff --git a/Documentation/admin-guide/l1tf.rst b/Documentation/admin-guide/l1tf.rst
> index b85dd80510b0..2e65e6cb033e 100644
> --- a/Documentation/admin-guide/l1tf.rst
> +++ b/Documentation/admin-guide/l1tf.rst
> @@ -405,6 +405,9 @@ time with the option "l1tf=". The valid arguments for this option are:
>  
>    off		Disables hypervisor mitigations and doesn't emit any
>  		warnings.
> +		It also drops the swap size and available RAM limit restrictions
> +                on both hypervisor and bare metal.
> +

Note tha there's also some whitespace damage here: all other similar 
lines in this RST file start with two tabs, this one starts with 8 
spaces.

Thanks,

	Ingo