修復Spectre漏洞 Linux 4.20測試

hioohi

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.

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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

普羅

公司VMHOST ESXI打完PATCH後關晒HT, 廢左一半功力

yohoman0000

Intel咁多年黎既好成績靠漏洞維持，而家現形

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cal22cal

有時間就睇吓啲 comments
https://www.phoronix.com/forums/node/1061646

pnedved

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！

KinChungE

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

chue

呢D硬傷內核寫得再好都冇用,明顯唔係為 INTEL 寫

YES_MAN

Intel全新安全為先架構CPU幾時出?