linux-kernel - Re: [RFC] x86/cpu_entry_area: move part of it back to fixmap

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Message-ID: <6C089922-C70D-4FF3-9B80-1F21FA80B175@vmware.com>
Date:   Thu, 4 Oct 2018 09:41:15 +0000
From:   Nadav Amit <namit@...are.com>
To:     Peter Zijlstra <peterz@...radead.org>
CC:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "x86@...nel.org" <x86@...nel.org>,
        David Woodhouse <dwmw@...zon.co.uk>,
        Andy Lutomirski <luto@...nel.org>
Subject: Re: [RFC] x86/cpu_entry_area: move part of it back to fixmap

at 12:37 AM, Peter Zijlstra <peterz@...radead.org> wrote:

> On Wed, Oct 03, 2018 at 09:59:48PM -0700, Nadav Amit wrote:
>> This patch proposes to do something different: break
>> it into two. One part holds code+data that is needed for the entry
>> (trampoline code, entry stack and TSS), which is mapped in the fixmap.
> 
>> The other part holds the exception_stacks, debug store and buffers, and
>> is left in its current (new) position.
> 
>> The name
>> "cpu_entry_area_aux" for the second area is awful (ideas are welcomed),
> 
> How about: cpu_data_area ? Since none of that is required for the entry,
> that should also not be part of its name.

I’m fine with your name. But I want to know whether the solution in general
is acceptable.