linux-kernel - Re: [RFC PATCH 04/14] sparc64: load shared id into context register 1

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Message-ID: <20161221181751.GE3311@ravnborg.org>
Date:   Wed, 21 Dec 2016 19:17:51 +0100
From:   Sam Ravnborg <sam@...nborg.org>
To:     Mike Kravetz <mike.kravetz@...cle.com>
Cc:     David Miller <davem@...emloft.net>, sparclinux@...r.kernel.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        bob.picco@...cle.com, nitin.m.gupta@...cle.com,
        vijay.ac.kumar@...cle.com, julian.calaby@...il.com,
        adam.buchbinder@...il.com, kirill.shutemov@...ux.intel.com,
        mhocko@...e.com, akpm@...ux-foundation.org
Subject: Re: [RFC PATCH 04/14] sparc64: load shared id into context register 1

Hi Mike.

> Or, perhaps we only enable
> the shared context ID feature on processors which have the ability to work
> around the backwards compatibility feature.

Start out like this, and then see if it is really needed with the older processors.
This should keep the code logic simpler - which is always good for this complicated stuff.

	Sam