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From: Pavel Machek <pavel@ucw.cz>
To: kernel list <linux-kernel@vger.kernel.org>
Cc: hpa@linux.intel.com, mchehab@redhat.com
Subject: Wrong defaults in 3.7-rc3
Date: Thu, 15 Nov 2012 12:06:20 +0100	[thread overview]
Message-ID: <20121115110620.GA3451@elf.ucw.cz> (raw)

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

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

             reply	other threads:[~2012-11-15 11:06 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-11-15 11:06 Pavel Machek [this message]
2012-11-15 11:43 ` Wrong defaults in 3.7-rc3 Mauro Carvalho Chehab
2012-11-16 21:32 ` H. Peter Anvin

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