On Fri, 05 Nov 2021 14:49:57 +0000, Sean Christopherson <seanjc@xxxxxxxxxx> wrote: > > +Juergen and Marc > > On Fri, Nov 05, 2021, Nicholas Piggin wrote: > > Increasing the max VCPUs on powerpc makes the kvm_arch member offset > > great enough that some assembly breaks due to addressing constants > > overflowing field widths. > > > > Moving the vcpus array to the end of struct kvm prevents this from > > happening. It has the side benefit that moving the large array out > > from the middle of the structure should help keep other commonly > > accessed fields in the same or adjacent cache lines. > > > > Signed-off-by: Nicholas Piggin <npiggin@xxxxxxxxx> > > --- > > > > It would next be possible to now make this a dynamically sized array, > > and make the KVM_MAX_VCPUS more dynamic > > Marc has a mostly-baked series to use an xarray[1][2] that AFAICT > would be well received. That has my vote, assuming it can get into > 5.16. Marc or Juergen, are either of you actively working on that? I've just revived it, as it needed some RISC-V changes. I'll post it in a jiffy. M. -- Without deviation from the norm, progress is not possible.
