On 23/09/19 12:42, Dr. David Alan Gilbert wrote: > > With those two clues, I guess maybe some dirty pages made by L2 are > not transferred to the destination correctly, but I'm not really sure. > > 3) It happens on Intel(R) Xeon(R) Silver 4114 CPU, but it does not on > Intel(R) Xeon(R) CPU E5-2630 v3 CPU.
Hmm, try disabling pml (kvm_intel.pml=0). This would be the main difference, memory-management wise, between those two machines. Paolo