Response to Meltdown and Spectre
ralf.mardorf at rocketmail.com
Sat Feb 3 16:59:22 UTC 2018
On Sat, 3 Feb 2018 16:18:30 -0000 (UTC), Christian Weisgerber wrote:
>On 2018-02-01, "@lbutlr" <kremels at kreme.com> wrote:
>> That seems highly unlikely. It will damage the role of Intel in
>> the server market fora time, but the trouble is that AMD's behavior
>> has been at least as bad as Intel's, if not worse, in regards to
>> Meltdown, so there's not a clearly better choice even though the
>> AMD chips have less issues.
>AMD's initial response appeared to have been written by a PR person
>who simply summarized the vulnerability information from the
>Spectre/Meltdown papers and deployed the usual head-in-the-sand
>position that there is no vulnerability until an exploit is
>AMD has always said that their x86 CPUs are not vulnerable to
>Meltdown and nobody is contradicting them on this. However, like
>everybody else implementing speculative executaion, they are
>vulnerable to Spectre variants 1 and 2. The initial response
>downplayed this dangerously, but they eventually admitted it.
>The best reaction came from ARM. They provided a COMPLETE list of
>all their CPUs that are affected, and they documented another
>vulnerability (Meltdown 3a, reading of supervisor registers from
>user mode) that had not even been considered in the original research
They are all liars,
doesn't list my Intel(R) Celeron(R) CPU G1840. I seriously doubt that
it isn't affected.
However, using FreeBSD I can't do the work of my domain. Using AMD
processors I only made bad experiences for my domain, now with my first
Intel CPU, I'm much more troublefree. the domain is real-time pro-audio.
Blanket judgement regarding CPU, as well as kernel design are foolish.
I didn't test if I need to do it, but I welcom that I could disable
page-table isolation for new Linux kernels, since the Meltdown security
vulnerability is irrelevand for an audio workstaton.
In short, we should take the chance to reconsider the one computer for
everything approach. Why not using computers with operating
systems and CPUs tailored to their purposes? The one computer for
everything attitude implies issues.
I'm using a record player to listen to recordings and a washing machine
to wash my clothes, they aren't networked. I'm using one and the same
computer as a digital audio workstation and to access the Internet for
emailing, browsing and updating, but I don't do both at the same time,
so different boot options are helpful. For audio work I might buy a new
computer with more horse power and more power consumption in the future
and use another computer with less horse power and less power consumpton
for emailing, browsing and downloading updates.
The real issue is to expect the "eierlegende Wollmilchsau" (all-in-one
device or creature suitable for every purpose), see
since such monsters are asking for trouble.
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