From: Pavel Machek <pavel@ucw.cz>
To: "Christian Krüger" <C.Krueger.B@web.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Suggestion: „spectre_v2=off“ and „nopti“ per default in "Intel Atom N270" case?
Date: Wed, 23 May 2018 12:53:02 +0200 [thread overview]
Message-ID: <20180523105302.GE15312@amd> (raw)
In-Reply-To: <72a7122d-0020-f307-a76d-bb80a2c19842@web.de>
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On Sat 2018-05-19 21:53:02, Christian Krüger wrote:
> Hi,
>
> Since the old "in-order-execution" Intel CPUs like the Intel Atom N270
> (known for being installed in many Netbooks and Nettops) are not sensitive
> for "Meltdown" & "Spectre" , wouldn't it be a good idea to exclude these
> anyway "weak" CPUs from the costly patches by default?
>
> Browsing the web, I can "feel the difference" if the matching kernel options
> are applied on such a device.
Can you also measure the difference? Placebo effect is hard to avoid.
But yes, we do not need to do workarounds on non-buggy machines...
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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next prev parent reply other threads:[~2018-05-23 10:53 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-19 19:53 Suggestion: „spectre_v2=off“ and „nopti“ per default in "Intel Atom N270" case? Christian Krüger
2018-05-23 10:53 ` Pavel Machek [this message]
2018-05-23 17:07 ` Johannes Hirte
2018-05-23 18:40 ` Christian Krüger
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