作者: hioohi 時間: 2018-11-18 22:32 標題: 修復Spectre漏洞 Linux 4.20測試
As outlined yesterday, significant slowdowns with the Linux 4.20 kernel turned out to be due to the addition of the kernel-side bits for STIBP (Single Thread Indirect Branch Predictors) for cross-HyperThread Spectre Variant Two mitigation. This has incurred significant performance penalties with the STIBP support in its current state with Linux 4.20 Git and is enabled by default at least for Intel systems with up-to-date microcode.
https://www.phoronix.com/scan.ph ... 20-bisect&num=1
more benchmarks
https://www.phoronix.com/scan.ph ... 420-stibp&num=1
d patch打下打下i7變i5
Intel
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作者: 普羅 時間: 2018-11-18 22:51
公司VMHOST ESXI打完PATCH後關晒HT, 廢左一半功力
作者: yohoman0000 時間: 2018-11-19 08:56
Intel咁多年黎既好成績靠漏洞維持，而家現形
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作者: toylet 時間: 2018-11-19 12:15
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作者: cal22cal 時間: 2018-11-19 13:50
有時間就睇吓啲 comments
https://www.phoronix.com/forums/node/1061646
作者: pnedved 時間: 2018-11-19 15:01
Intel咁多年黎既好成績靠漏洞維持，而家現形
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yohoman0000 發表於 2018-11-19 08:56
而家咪慢慢還囉.. intel算吧啦！
作者: kkclf 時間: 2018-11-19 20:58
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作者: KinChungE 時間: 2018-11-20 09:49
i7 變 i5 都算, 一般家用唔會太覺
Coffeelake 變 bulldozer 就大鑊了
kkclf 發表於 2018-11-19 20:58
可唔可以俾個option我, 一鍵熄哂所有patch
作者: chue 時間: 2018-11-20 19:26
呢D硬傷內核寫得再好都冇用,明顯唔係為 INTEL 寫
作者: YES_MAN 時間: 2018-11-21 10:27
Intel全新安全為先架構CPU幾時出?
作者: MaY_bE 時間: 2018-11-22 03:29
Intel全新安全為先架構CPU幾時出?
YES_MAN 發表於 2018-11-21 10:27 AM
2019尾
作者: 044003 時間: 2018-11-22 08:52
As outlined yesterday, significant slowdowns with the Linux 4.20 kernel turned out to be due to the ...
hioohi 發表於 2018-11-18 22:32
9系有冇影響?
作者: cal22cal 時間: 2018-11-24 10:43
Linus Torvalds Comments On STIBP & He's Not Happy - STIBP Default Will End Up Changing
https://www.phoronix.com/scan.ph ... valds-STIBP-Comment
- ,... disable SMT entirely, which is what security-conscious people do anyway. ....
尋日出咗 4.19.4，有一個
- Revert "x86/speculation: Enable cross-hyperthread spectre v2 STIBP mitigation"
-
- This reverts commit 233b9d7df0e114c7e7c3674559fb0fc41ada3e8f which is
- commit 53c613fe6349994f023245519265999eed75957f upstream.
-
- It's not ready for the stable trees as there are major slowdowns
- involved with this patch.
而家用緊 4.19.4-gentoo，boot under disable all spectre fixes，compile kernel 4.14.83-gentoo，冇問題完成