Linux4.20針對Meltdown/Spectre/..修正 - 3C

By Tracy
at 2018-11-26T18:33

Table of Contents

Revert "x86/speculation: Enable cross-hyperthread spectre v2 STIBP mitigation"

It's not ready for the stable trees as there are major slowdowns involved with t
his patch.

簡而言之可說補洞的代價太大了...

目前
4.19.4
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.4
和
4.14.83
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.83
撤回STIBP
是否加回來或還能怎麼改
有待觀察

這真是場災難...

--

Tags: 3C

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By Delia
at 2018-11-29T06:02

畢竟30~50%真的太誇張

By Suhail Hany
at 2018-11-30T23:21

直接關HT也許才損失20%而已

By Xanthe
at 2018-12-02T00:23

真的關HT比較快

By Lily
at 2018-12-05T23:54

關HT簡單無副作用

By Kama
at 2018-12-06T15:11

關HT大概少30%怎麼看都划算

By Irma
at 2018-12-08T18:27

看九代i7沒有HT再看這篇我好像了解到了什麼...

By Daph Bay
at 2018-12-10T13:09

kernel parameters弄個ht的開關最省事(咦

By Noah
at 2018-12-11T11:59

直接關 HT，反正這個 bug 看起來以後也修不完

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Linux4.20針對Meltdown/Spectre/..修正 - 3C

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