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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