linux-kernel - Re: [GIT pull] x86 mpx support for 3.19

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Message-ID: <CA+55aFwzCuFCzASb4Kj1WC7S9v1wSKN2dHj_ns_1uy2GG6Svqw@mail.gmail.com>
Date:	Wed, 10 Dec 2014 12:49:22 -0800
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Dave Hansen <dave.hansen@...ux.intel.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"the arch/x86 maintainers" <x86@...nel.org>
Subject: Re: [GIT pull] x86 mpx support for 3.19

On Wed, Dec 10, 2014 at 12:39 PM, Dave Hansen
<dave.hansen@...ux.intel.com> wrote:
>
> I misspoke there.  I meant SMAP (I placed MPX below its config option).

Ok, I agree on SMAP, we might want to have that be configurable too,
especially for smaller systems (I *think* SMAP is big-core only,
right?). I'm not sure how much of a possible performance downside it
has, but it does add instructions to potentially critical areas.

                     Linus
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