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Author Topic: Linux's Speculation Handling Was Messed Up After Resuming From Suspend For Boot  (Read 790 times)

Offline nick65go

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Linux's Speculation Handling Was Messed Up After Resuming From Suspend For Boot
« on: April 07, 2022, 08:02:46 AM »
It turns out that when Linux was resuming from S3 suspend, it wasn't correctly restoring the MSRs for the boot CPU around handling speculative execution mitigations. :( Perhaps they are starting turning off computers only now, due to surging energy prices...
https://www.phoronix.com/scan.php?page=news_item&px=Linux-Resume-Spec-Boot-CPU
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