Re: [WARNING] Intel Skylake/Kaby Lake processors: broken hyper-threading

2017-07-18 Thread Mauro Hinz
Enviado do meu iPhone

Re: [WARNING] Intel Skylake/Kaby Lake processors: broken hyper-threading

2017-07-02 Thread Zlatan Todoric
On 06/26/2017 03:01 PM, Holger Levsen wrote: On Mon, Jun 26, 2017 at 02:30:24PM +0200, Benjamin Drung wrote: The same complaint can be said about the AMD microcode updates. quite probably, yes. but that doesn't make any crap any better. Yet, afaik, you use Qubes which recommends Intel and A

Re: [WARNING] Intel Skylake/Kaby Lake processors: broken hyper-threading

2017-06-27 Thread Andy Smith
Hello, On Tue, Jun 27, 2017 at 09:37:01AM +0200, Florian Weimer wrote: > > On Mon, 2017-06-26 at 08:34 +, Holger Levsen wrote: > > Other procesors aren't bug-free, they just don't get as many bug fixes. > > And the fixes aren't documented publicly at all. Similar to the time I was affected b

Re: [WARNING] Intel Skylake/Kaby Lake processors: broken hyper-threading

2017-06-27 Thread Henrique de Moraes Holschuh
(updated perl script, it now needs the "liblist-moreutils-perl" package) On Sun, 25 Jun 2017, Henrique de Moraes Holschuh wrote: > On Sun, 25 Jun 2017, Henrique de Moraes Holschuh wrote: > > This warning advisory is relevant for users of systems with the Intel > > processors code-named "Skylake" a

Re: [WARNING] Intel Skylake/Kaby Lake processors: broken hyper-threading

2017-06-27 Thread Florian Weimer
* Ben Hutchings: > On Mon, 2017-06-26 at 08:34 +, Holger Levsen wrote: >> On Sun, Jun 25, 2017 at 09:19:36AM -0300, Henrique de Moraes Holschuh wrote: >> [...] >> > Apparently, Intel had indeed found the issue, *documented it* (see >> > below) and *fixed it*.  There was no direct feedback to t

Re: [WARNING] Intel Skylake/Kaby Lake processors: broken hyper-threading

2017-06-26 Thread Henrique de Moraes Holschuh
(updates, hopefully the last ones...) On Sun, 25 Jun 2017, Henrique de Moraes Holschuh wrote: > Fast-forward a few months, and Mark Shinwell noticed the mention of a > possible fix for a microcode defect with unknown hit-ratio in the > intel-microcode package changelog. He matched it to the issue

Re: [WARNING] Intel Skylake/Kaby Lake processors: broken hyper-threading

2017-06-26 Thread Ben Hutchings
On Mon, 2017-06-26 at 08:34 +, Holger Levsen wrote: > On Sun, Jun 25, 2017 at 09:19:36AM -0300, Henrique de Moraes Holschuh wrote: > [...] > > Apparently, Intel had indeed found the issue, *documented it* (see > > below) and *fixed it*.  There was no direct feedback to the OCaml > > people, so

Re: [WARNING] Intel Skylake/Kaby Lake processors: broken hyper-threading

2017-06-26 Thread Jonathan Dowland
On Mon, Jun 26, 2017 at 06:14:36PM +0500, Andrey Rahmatullin wrote: On Mon, Jun 26, 2017 at 02:08:20PM +0100, Jonathan Dowland wrote: > Yet "don't buy anything" is not a good advice. Have we ruled out all ARM vendors yet? :) Are we still talknig about general-purpose computers? In 2017? Sure

Re: [WARNING] Intel Skylake/Kaby Lake processors: broken hyper-threading

2017-06-26 Thread Andrey Rahmatullin
On Mon, Jun 26, 2017 at 02:08:20PM +0100, Jonathan Dowland wrote: > > Yet "don't buy anything" is not a good advice. > Have we ruled out all ARM vendors yet? :) Are we still talknig about general-purpose computers? -- WBR, wRAR signature.asc Description: PGP signature

Re: [WARNING] Intel Skylake/Kaby Lake processors: broken hyper-threading

2017-06-26 Thread Jonathan Dowland
On Mon, Jun 26, 2017 at 06:04:43PM +0500, Andrey Rahmatullin wrote: Yet "don't buy anything" is not a good advice. Have we ruled out all ARM vendors yet? :) -- ⢀⣴⠾⠻⢶⣦⠀ ⣾⠁⢠⠒⠀⣿⡁ Jonathan Dowland ⢿⡄⠘⠷⠚⠋⠀ https://jmtd.net ⠈⠳⣄ Please do not CC me, I am subscribed to the list.

Re: [WARNING] Intel Skylake/Kaby Lake processors: broken hyper-threading

2017-06-26 Thread Andrey Rahmatullin
On Mon, Jun 26, 2017 at 01:01:51PM +, Holger Levsen wrote: > > The same complaint can be said about the AMD microcode updates. > quite probably, yes. but that doesn't make any crap any better. Yet "don't buy anything" is not a good advice. -- WBR, wRAR signature.asc Description: PGP signat

Re: [WARNING] Intel Skylake/Kaby Lake processors: broken hyper-threading

2017-06-26 Thread Holger Levsen
On Mon, Jun 26, 2017 at 02:30:24PM +0200, Benjamin Drung wrote: > The same complaint can be said about the AMD microcode updates. quite probably, yes. but that doesn't make any crap any better. -- cheers, Holger signature.asc Description: Digital signature

Re: [WARNING] Intel Skylake/Kaby Lake processors: broken hyper-threading

2017-06-26 Thread Benjamin Drung
Am Montag, den 26.06.2017, 08:34 + schrieb Holger Levsen: > On Sun, Jun 25, 2017 at 09:19:36AM -0300, Henrique de Moraes Holschuh > wrote: > [...] > > Apparently, Intel had indeed found the issue, *documented it* (see > > below) and *fixed it*.  There was no direct feedback to the OCaml > > peo

Re: [WARNING] Intel Skylake/Kaby Lake processors: broken hyper-threading

2017-06-26 Thread Holger Levsen
On Mon, Jun 26, 2017 at 08:39:10AM -0300, Henrique de Moraes Holschuh wrote: > As far as I know, so far OCaml is the only one that was verified to be > caused by the SKL150 erratum. [...] thanks for providing these details. -- cheers, Holger signature.asc Description: Digital signatu

Re: [WARNING] Intel Skylake/Kaby Lake processors: broken hyper-threading

2017-06-26 Thread Henrique de Moraes Holschuh
On Mon, 26 Jun 2017, Holger Levsen wrote: > Are there any other public bug reports which got fixed by this, or is the > ocaml issue the only known issue which gets fixed by installing this microcode > update? As far as I know, so far OCaml is the only one that was verified to be caused by the SKL1

Re: [WARNING] Intel Skylake/Kaby Lake processors: broken hyper-threading

2017-06-26 Thread Holger Levsen
On Mon, Jun 26, 2017 at 01:51:25PM +0500, Andrey Rahmatullin wrote: > > but YOU MUST INSTALL THIS BINARY BLOB > How is it worse than the blobs already in your hardware? it opens the door for targeted attacks. -- cheers, Holger signature.asc Description: Digital signature

Re: [WARNING] Intel Skylake/Kaby Lake processors: broken hyper-threading

2017-06-26 Thread Andrey Rahmatullin
On Mon, Jun 26, 2017 at 08:34:57AM +, Holger Levsen wrote: > but YOU MUST INSTALL THIS BINARY BLOB How is it worse than the blobs already in your hardware? -- WBR, wRAR signature.asc Description: PGP signature

Re: [WARNING] Intel Skylake/Kaby Lake processors: broken hyper-threading

2017-06-26 Thread Holger Levsen
On Sun, Jun 25, 2017 at 09:19:36AM -0300, Henrique de Moraes Holschuh wrote: [...] > Apparently, Intel had indeed found the issue, *documented it* (see > below) and *fixed it*. There was no direct feedback to the OCaml > people, so they only found about it later. [...] > We do not have enough info

Re: [WARNING] Intel Skylake/Kaby Lake processors: broken hyper-threading

2017-06-25 Thread Henrique de Moraes Holschuh
Minor update on the issue: The check command provided in the advisory to test for hyper-threading doesn't work: it will always report hyper-theading as enabled. A better command is provided below. Note: this also means the perl script will give some false-positives. I apologise for the inconveni

Re: [WARNING] Intel Skylake/Kaby Lake processors: broken hyper-threading

2017-06-25 Thread Henrique de Moraes Holschuh
For the record: the email with the perl script doesn't contain malware. The "malware" alert came from an extremely badly configured system that violates every best practice in the field: it sends email to every original recipient (and not just to local users), and it FORGES its headers to look lik

Re: [WARNING] Intel Skylake/Kaby Lake processors: broken hyper-threading

2017-06-25 Thread Henrique de Moraes Holschuh
On Sun, 25 Jun 2017, Henrique de Moraes Holschuh wrote: > This warning advisory is relevant for users of systems with the Intel > processors code-named "Skylake" and "Kaby Lake". These are: the 6th and > 7th generation Intel Core processors (desktop, embedded, mobile and > HEDT), their related ser

[WARNING] Intel Skylake/Kaby Lake processors: broken hyper-threading

2017-06-25 Thread Henrique de Moraes Holschuh
This warning advisory is relevant for users of systems with the Intel processors code-named "Skylake" and "Kaby Lake". These are: the 6th and 7th generation Intel Core processors (desktop, embedded, mobile and HEDT), their related server processors (such as Xeon v5 and Xeon v6), as well as select