Comment 681 for bug 1690085

(In reply to Philip Rosvall from comment #593)
> Since 5.0.10, and this commit ...:
>
> (https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.10)
> "commit 205c53cbe553c9e5a9fe93f63e398da7e59124b6
> Author: Thomas Gleixner <email address hidden>
> Date: Sun Apr 14 19:51:06 2019 +0200
>
> x86/speculation: Prevent deadlock on ssb_state::lock

If that commit really fixes the "issue" on your machine then you
shouldn't have been experiencing any softlockups etc, i.e., what this
bugzilla is about, but rather a software deadlock.

Which would mean that your machine is not necessarily affected by the
entering into a C-state with MWAIT and not waking up after, issue.