From owner-freebsd-questions@freebsd.org Tue Jan 9 00:20:39 2018 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 7BFA8E6E286 for ; Tue, 9 Jan 2018 00:20:39 +0000 (UTC) (envelope-from ralf.mardorf@rocketmail.com) Received: from sonic305-21.consmr.mail.ir2.yahoo.com (sonic305-21.consmr.mail.ir2.yahoo.com [77.238.177.83]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 1C1737CE2E for ; Tue, 9 Jan 2018 00:20:38 +0000 (UTC) (envelope-from ralf.mardorf@rocketmail.com) X-YMail-OSG: 0fKvg_kVM1kU25vqpVax4JHkk7WlbPrXNFU2_7PdaczYKxRd_bGmuJqvIogn89Z kyDYKofpnARaMdP0MJFsy0TfQkfvhjdfk6vFuMnwltMGRqKBi3fs6X8.fv54sLhTCf3DV7xGHfiP EvVvn9W_5Bhd0ZVP1AtILDclpYxd5539Ha_zLdd9fxJsR8Ijbqgs8XD_VhZDf0RENizyNJ2BrYWj UtR992Emqvz5W0gpLG1j9Bb9vStqmOtOTrTQMOLQ1MbzN10WPFfMrTv8U7eqcL2bkma1TDNFsqW7 7eeuQIGWxthpkzFUkn.W7vnLQIrhjsu9.KKecOPl5Xm2LVTxNR0YEWJp4yWyBwALdlvlFWIh53PL 3JMoHoKwHALs6jY0Pi_1Ppl.s1Y5BgzbAThp1.fNkPQS8EbG_rBqmBnZ.XBTpH4qdHy_ryzhyN8s TJ8yMrvN8LM56Ltcia69pJmWyM95.hjqEniZK3JAe.BiXwD_v3.wKnSBkElqdJwfnJZ.16B3C5UL OlBGppyG.JS7xpXdkYOi265.m7sKWrFE7EvuUjA-- Received: from sonic.gate.mail.ne1.yahoo.com by sonic305.consmr.mail.ir2.yahoo.com with HTTP; Tue, 9 Jan 2018 00:20:30 +0000 Received: from smtp169.mail.ir2.yahoo.com (EHLO archlinux.localdomain) ([46.228.39.36]) by smtp414.mail.ir2.yahoo.com (JAMES SMTP Server ) with ESMTPA ID f9eb53a83d79643efc3016402fbbf5cc; Tue, 09 Jan 2018 00:20:27 +0000 (UTC) Date: Tue, 9 Jan 2018 01:20:28 +0100 From: Ralf Mardorf To: freebsd-questions@freebsd.org Cc: Polytropon Subject: Re: Meltdown =?UTF-8?B?4oCT?= Spectre Message-ID: <20180109012028.6e9a2471@archlinux.localdomain> In-Reply-To: <20180108195821.0195794b.freebsd@edvax.de> References: <3AECDC7F-8838-4C09-AC7F-117DFBAA326C@sigsegv.be> <20180108085756.GA3001@c720-r314251> <20180108195821.0195794b.freebsd@edvax.de> X-Mailer: Claws Mail 3.16.0git3 (GTK+ 2.24.31; x86_64-arch-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 09 Jan 2018 00:20:39 -0000 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