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Disabling Intel Hyper-Threading technology in some situations.

Okay, but which situations?

Edit:

https://www.intel.com/content/www/us/en/architecture-and-tec...

Is Intel recommending HT is turned off?

For a portion of the datacenter market – specifically a subset of those running traditional virtualization technology, and primarily in the datacenter – it may be advisable that customers or partners take additional steps to protect their systems. This is principally to safeguard against situations where the IT admin or cloud provider cannot guarantee that all virtualized operating systems are protected. Deciding to take additional steps depends on the system software in use, the workload, and the customer’s assessment of the security threat model for their environment.

I wonder how many devs should think about this? Is it a risk from Vagrant, Docker, etc?