On Wed, 17 May 2017 16:37:52 +1000 David Gibson <da...@gibson.dropbear.id.au> wrote: [...] > > >> > > >> Greg is looking at re-adding the ICPState array because of a > > >> migration issue with older machines. We might need to do so > > >> unconditionally ... > > >> > > > > > > That would be a pity to carry on with the pre-allocated ICPStates for > > > new machine types just because of that... What about keeping track > > > of all the cap_irq_xics_enabled flags in a separate max_cpus sized > > > static array ? > > > > Could we use 'cpu->unplug' instead ? > > I've only half followed this discussion, but fwiw I prefer the idea of > "parking" in-kernel ICP objects, similarly to the way we do for > removed VCPUs, rather than going back to keeping ICP objects around > indefinitely and unconditionally. >
I'll give a try. Cheers, -- Greg
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