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Anonymous
Intel Skylake/Kaby Lake processors: broken hyper-threading 2017-06-25 09:52:00 Post No. 61081020
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Intel Skylake/Kaby Lake processors: broken hyper-threading 2017-06-25 09:52:00 Post No. 61081020
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Intel Skylake/Kaby Lake processors: broken hyper-threading
Anonymous
2017-06-25 09:52:00
Post No. 61081020
[Report]
https://lists.debian.org/debian-devel/2017/06/msg00308.html
>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 Intel Pentium processor models.
>TL;DR: unfixed Skylake and Kaby Lake processors could, in some
situations, dangerously misbehave when hyper-threading is enabled.
Disable hyper-threading immediately in BIOS/UEFI to work around the
problem. Read this advisory for instructions about an Intel-provided
fix.
Well played, Intel
>>
>CPUs aren't allowed to have bugs
DURRRR I'M RETARDED DURRR LETS JUST IGNORE RYZEN CAN'T EVEN DO FMA WITHOUT CRASHING
>>
>>61081020
http://vocaroo.com/i/s1p98Qh2if6B
>>
you know, it's only skylake AND kabylake because they're the same fucking chips
>>
>>61081226
Holy fuck you sound roasted.
>>
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>>61081255
More like well done.
>>
>>61081226
having to work with critical systems using these cpu's with hyperthreading, yes it's pretty fucking important to have a fix on this bug.
>>
What we know about the microcode updates issued by Intel related to
these specific errata:
Fixes for processors with signatures[1] 0x406E3 and 0x506E3 are
available in the Intel public Linux microcode release 20170511. This
will fix only Skylake processors with model 78 stepping 3, and model 94
stepping 3. The fixed microcode for these two processor models reports
revision 0xb9/0xba, or higher.
Apparently, these errata were fixed by microcode updates issued in early
April/2017. Based on this date range, microcode revision 0x5d/0x5e (and
higher) for Kaby Lake processors with signatures 0x806e9 and 0x906e9
*might* fix the issue. We do not have confirmation about which
microcode revision fixes Kaby Lake at this time.
Related processor signatures and microcode revisions:
Skylake : 0x406e3, 0x506e3 (fixed in revision 0xb9/0xba and later,
public fix in linux microcode 20170511)
Skylake : 0x50654 (no information, erratum listed)
Kaby Lake : 0x806e9, 0x906e9 (defect still exists in revision 0x48,
fix available as a BIOS/UEFI update)
>>
>>61081020
Sadly, fixes in CPUville usually means just turning broken features off. Which means less functionality, performance or both.
>>
>>61081226
the FMA bug was fixed in AGESA 1.0.0.4
just like this is fixed by newer microcode
it's just /g/ having some fun; don't get so riled up
>>
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>>61081020
Oh look it's another AMD shill thread
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