Re: Meltdown – Spectre - Was: kernel 4.4.0-108 / 16.04 LTS does not boot anymore

[Gilles Gravier]

Hi!


On 12/01/2018 04:39, Ralf Mardorf wrote:
> On Fri, 12 Jan 2018 03:10:42 +0000 (UTC), Jonesy via ubuntu-users wrote:
>> kernel 4.4.0-109 is available
> Hi,
>
> is it using a backported KPTI patch set, respl. is it possible to
> disable it by booting with nopti [1]? I don't have the time to read
> changelogs at the moment.
>
> Since a DAW not necessarily is connected to the Internet at all, but
> requires best performance, disabling might be better, than using the
> KPTI patch set and suffering from loss of performance. I read a German
> article about extreme performance loss for SSD usage, but the article
> doesn't mention Linux.
>
> However, I didn't make tests, just installed 4.4.0.109.114 a few
> minutes ago.
>
> [root at archlinux moonstudio]# systemd-nspawn -q apt list linux-lowlatency -qq
> linux-lowlatency/xenial-updates,xenial-security,now 4.4.0.109.114 amd64 [installed]
>
> Regards,
> Ralf
>
> [1] https://lwn.net/Articles/741878/

A quick question to the OP... Is the machine an AMD machine (not AMD64,
I mean AMD processor versus Intel)?

Gilles