linux-kernel - Re: [PATCH 00/15] x86: Enable FSGSBASE instructions

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Message-ID: <CALCETrU9DiumP9ODKm-dW-MubJSmkFKjGkSJyw34-WbxAK0Xrw@mail.gmail.com>
Date:   Wed, 21 Mar 2018 00:40:18 +0000
From:   Andy Lutomirski <luto@...nel.org>
To:     "Bae, Chang Seok" <chang.seok.bae@...el.com>
Cc:     Andy Lutomirski <luto@...nel.org>, X86 ML <x86@...nel.org>,
        Andi Kleen <ak@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        "Metzger, Markus T" <markus.t.metzger@...el.com>,
        "Luck, Tony" <tony.luck@...el.com>,
        "Shankar, Ravi V" <ravi.v.shankar@...el.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 00/15] x86: Enable FSGSBASE instructions

On Tue, Mar 20, 2018 at 4:33 PM, Bae, Chang Seok
<chang.seok.bae@...el.com> wrote:
> On 3/20/18, 08:07, "Andy Lutomirski" <luto@...nel.org> wrote:
>> Can you describe what changed since the last submission?  It looks
>> like a lot has changed and this series is much more complicated and
>> much more fragile than it used to be.  Why?
>
> According to your overall comments, most concerning part you have right now
> is paranoid entry and ptrace legacy support. (correct me if I'm wong)
> Design-wise, I think they're major changes -- I can follow-up with
> a summary if you want. I responded about paranoid entry. ptrace
> legacy support is simply new that never before AFAIK.

Summary please.