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Date:      Tue, 9 Jan 2018 01:20:28 +0100
From:      Ralf Mardorf <ralf.mardorf@rocketmail.com>
To:        freebsd-questions@freebsd.org
Cc:        Polytropon <freebsd@edvax.de>
Subject:   Re: Meltdown =?UTF-8?B?4oCT?= Spectre
Message-ID:  <20180109012028.6e9a2471@archlinux.localdomain>
In-Reply-To: <20180108195821.0195794b.freebsd@edvax.de>
References:  <f9cc484e-be92-7aff-52fe-38655e85dbaa@columbus.rr.com> <CAH78cDqPnOUGoU=6x-BiugnpjmjYcd=CZS3fSNaX5tq-Uvma7g@mail.gmail.com> <bc9ad15b-a718-b901-76fa-bc43ce0c1f1a@columbus.rr.com> <3AECDC7F-8838-4C09-AC7F-117DFBAA326C@sigsegv.be> <20180108085756.GA3001@c720-r314251> <20180108195821.0195794b.freebsd@edvax.de>

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On Mon, 8 Jan 2018 19:58:21 +0100, Polytropon wrote:
>On Mon, 8 Jan 2018 09:57:56 +0100, Matthias Apitz wrote:
>> El d=C3=ADa lunes, enero 08, 2018 a las 09:22:34a. m. +0100, Kristof
>> Provost escribi=C3=B3:=20
>> > They have been aware of the problem for 6+ months. FreeBSD was
>> > notified in late December. It=E2=80=99s being worked on, but these are
>> > non-trivial changes, so it=E2=80=99ll take some time. =20
>>=20
>> As I side note, and not related to FreeBSD: My Internet server is
>> run by some webhosting company (www.1blu.de), they use Ubuntu
>> servers and since yesterday they have shutdown SSH access to the
>> servers argumenting that they want protect my (all's) servers
>> against attacks of Meltdown and Spectre.
>>=20
>> Imagine, next time we have to shutdown all IOT gadgets... =20
>
>Additionally, prepare for your bills to increase. The current
>mitigation concepts, as far as I understand, result in a lower
>performance (about 20 %) of the patched (!) systems. So when
>you heavily rely on cloud infrastructures, and you have the
>magical "[x] upgrade my plan if justified by increased load"
>enabled, well... When things start costing money, you know
>who'll always pay... ;-)

"KPTI comes with a measurable run-time cost, estimated at about 5%.
That is a cost that some users may not want to pay, especially once
they get newer processors that lack these problems. There will be a
nopti command-line option to disable this mechanism at boot time." -
https://lwn.net/Articles/741878/

So for my audio workstation I much likely will boot with nopti and the
mentioned Ubuntu server seemingly slows down for around 5% and not
around 20% ;).

Regards,
Ralf

--=20
$ pacman -Q linux{,-rt{,-cornflower,-pussytoes}}|awk '{print $2}'
4.14.12-1
4.14.6_rt7-1
4.11.12_rt16-1
4.14.8_rt9-2



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