linux-kernel - Wrong defaults in 3.7-rc3

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Message-ID: <20121115110620.GA3451@elf.ucw.cz>
Date:	Thu, 15 Nov 2012 12:06:20 +0100
From:	Pavel Machek <pavel@....cz>
To:	kernel list <linux-kernel@...r.kernel.org>
Cc:	hpa@...ux.intel.com, mchehab@...hat.com
Subject: Wrong defaults in 3.7-rc3

Hi!

Supervisor Mode Access Prevention (X86_SMAP) [Y/n/?] (NEW)

...Slows stuff down, eats memory, only works on unreleased Intel CPUs
(from 2013!)  perhaps should be off by default?

"Supervisor Mode Access Prevention (SMAP) is a security
feature in newer Intel processors.  There is a small
performance cost if this enabled and turned on; there is
also a small increase in the kernel size if this is enabled."

Perhaps help text should mention what processors support it?

  DiBcom DiB0070 silicon base-band tuner (DVB_TUNER_DIB0070) [M/n/y/?]
  (NEW) n
  DiBcom DiB0090 silicon base-band tuner (DVB_TUNER_DIB0090) [M/n/y/?]
  (NEW) n

M is never good config default.

									Pavel

-- 
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(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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