On 06/12/2017 13:15, Christian Borntraeger wrote: >> a) bumping up KVM_MEM_MAX_NR_PAGES makes sense. > The original limitation comes from the fact that this define is used to limit > the number of bits in the dirty bitmap as some architectures do not provide > bitops beyond 2^32. > >> b) as I said, transparently handle it in kvm slot handling code. > adding Paolo to check what he thinks.
It's a bit of a first-world problem, :) and working around it in QEMU makes is easy enough that it's okay in my opinion. Bumping up KVM_MEM_MAX_NR_PAGES if the bitops allows it should be a good idea too, but it requires auditing the code for overflows and truncations. Paolo
