linux-kernel - Re: [PATCH v6 0/3] Add a kernel parameter to change the padding size for KASLR

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Message-ID: <20181003110045.naxl3r6dhi3vkbk4@gabell>
Date:   Wed, 3 Oct 2018 07:00:46 -0400
From:   Masayoshi Mizuma <msys.mizuma@...il.com>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        Baoquan He <bhe@...hat.com>, Borislav Petkov <bp@...en8.de>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 0/3] Add a kernel parameter to change the padding size
 for KASLR

On Wed, Oct 03, 2018 at 08:52:19AM +0200, Ingo Molnar wrote:
> 
> * Masayoshi Mizuma <msys.mizuma@...il.com> wrote:
> 
> > This patch series are adding an kernel parameter to change
> > the padding size used for KASLR. It is useful for memory hotplug
> > capable system. User can adjust the padding size to use it.
> > 
> > It is better if the padding size is calculated automatically,
> > however, ACPI SRAT is not available at the KASLR initialization
> > time. So, I add a message for user to tell the suitable padding
> > size. User can set it on next reboot.
> > 
> > This patch series don't change the current default padding size.
> > 
> > Change log from v5:
> >  - Fix build error if CONFIG_RANDOMIZE_MEMORY is not defined.
> 
> Please send a delta patch on top of tip:x86/boot with the get_rand_mem_physical_padding() fix, 
> when doing that you'll see that I did some minor cleanups when applying the patches which your 
> v6 series undoes.

I have sent the delta patch. Thanks!

- Masa