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From: Johannes Hirte <>
To: Pavel Machek <>
Cc: "Christian Krüger" <>,
Subject: Re: Suggestion: „spectre_v2=off“ and „nopti“ per default in "Intel Atom N270" case?
Date: Wed, 23 May 2018 19:07:07 +0200	[thread overview]
Message-ID: <20180523170706.GA21118@probook> (raw)
In-Reply-To: <20180523105302.GE15312@amd>

On 2018 Mai 23, Pavel Machek wrote:
> 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

On my Atom N270 there doesn't seem to be any workaround active with
kernel 4.14.42:

localhost ~ # cat /sys/devices/system/cpu/vulnerabilities/*
Not affected
Not affected
Not affected

Christian, did you verified the mitigations are active on your system?
What kernels are affected? 


  reply	other threads:[~2018-05-23 17:07 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-19 19:53 Christian Krüger
2018-05-23 10:53 ` Pavel Machek
2018-05-23 17:07   ` Johannes Hirte [this message]
2018-05-23 18:40     ` Christian Krüger

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