On 22/05/2017 17:11, Gonglei (Arei) wrote: >> These are kernel allocations done by KVM when it gets the >> KVM_SET_USER_MEMORY_REGION ioctl; of course the two memory maps >> point to >> the same userspace mmap-ed area. > > Oh? What's the mmapd-ed area you pointed? I mean the MAP_ANON pages that back the guest memory. > If the KVM allocate memory by vmalloc(), then it will occupy physical > memory (non physically contiguous memory) IMO. > > We can get the information from /proc/meminfo: > > # cat /proc/meminfo |grep Vmalloc > VmallocTotal: 34359738367 kB > VmallocUsed: 532796 kB > VmallocChunk: 34292018200 kB > > So I think this part of memory is double after that SMM commit. Right? Yes. Paolo
