On Mon, Sep 23, 2019 at 4:48 AM Paolo Bonzini <pbonz...@redhat.com> wrote: > > 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. >
Thank you, Paolo. This makes migration work successfully over 20 times in a row on Intel(R) Xeon(R) Silver 4114 CPU where migration failed almost always without disabling pml. I guess there's a problem in KVM pml code? I'm fine with disabling pml. But if you have patches to fix the issue, I'm willing to test it on the CPU. Thanks, Jintack > Paolo
