On Thu, Nov 16, 2017 at 01:30:57PM +0800, Wanpeng Li wrote: > -static DEFINE_PER_CPU(cpumask_var_t, __pv_tlb_mask); > +static DEFINE_PER_CPU(cpumask_t, __pv_tlb_mask); NR_CPUS=512 is a fairly common distro setting, that means cpumask_t is 64 bytes. So for my 144 CPU system, that is 9216 bytes I'll never see again. Not nice :/