Re: [Xen-devel] [PATCH v1 2/2] microcode: reject late ucode loading if any core is parked

[Jürgen Groß <jgross@xxxxxxxx>]

On 21.11.19 11:21, Jan Beulich wrote:
> On 21.11.2019 00:05, Chao Gao wrote:
> > If a core with all of its thread being parked, late ucode loading
> > which currently only loads ucode on online threads would lead to
> > differing ucode revisions in the system. In general, keeping ucode
> > revision consistent would be less error-prone. To this end, if there
> > is a parked thread doesn't have an online sibling thread, late ucode
> > loading is rejected.
> I'm confused. I thought we had agreed that the long term solution
> would be to briefly bring online a thread of cores with all their
> threads parked. What you do here was meant to be a temporary step
> only for 4.13, for which it is too late now (unless Jürgen
> indicates otherwise).
Which I don't intend to do.


Juergen

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