CPU performance - disable bug mitigations

Goran sendmailtogoran at gmail.com
Wed Nov 21 09:38:01 UTC 2018


Hi Ralf, as far as I understand your mails, it won't be enough just to
put disable-mitigations commands on the kernel command line. Is this a
correct understanding?

Further as far as I understand one kernel option (CONFIG_AUDIT=n) must
be deactivated in the running kernel. Is this correct?

You are aright, nopti is not needed for my CPU. I putted all
disable-mitigations commands on it, just to be sure. Maybe the server
will change. It's booting over the network and could easily replaced.
Am Mi., 21. Nov. 2018 um 10:27 Uhr schrieb Ralf Mardorf via
ubuntu-users <ubuntu-users at lists.ubuntu.com>:
>
> On Wed, 21 Nov 2018 10:06:03 +0100, Ralf Mardorf wrote:
> >However, "pti=off"/"nopti" isn't required for the OP's CPU, since
> >Meltdown is not affected
>
> I might be mistaken, that just the CPU isn't affect, not necessarily
> might mean that the kernel's page table isolation does have no impact
> on the machine using this CPU. I don't know how this actually is
> handled. My apologies for the "guessing".
>
>
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