request for analysis of per-process flag for controlling branch prediction on z
Bug #1751851 reported by
Steve Langasek
This bug affects 1 person
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| linux (Ubuntu) |
Triaged
|
Medium
|
Unassigned | ||
Bug Description
We understand that the z patches for spectre mitigation in the kernel include introduction of an interface to enable or disable branch prediction on a per-process basis.
I don't know what that interface looks like and what the usability is for production systems. It would be helpful to have some analysis here. Is it done in a way that can be set before the process starts executing? Is it inherited? Is it bound to the filesystem in some way? cgroups?
| Changed in linux (Ubuntu): | |
| status: | New → Incomplete |
| status: | Incomplete → Triaged |
| Changed in linux (Ubuntu): | |
| importance: | Undecided → Medium |
| tags: | added: kernel-da-key |
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