Oh wow.!? Is that really the case? I'm surprised because I see these things in my centos7 KVM VMs (aren't they signs of a PVM or at least a PVHVM? dmesg | grep -i virtual [ 0.000000] Booting paravirtualized kernel on KVM [ 0.398931] systemd[1]: Detected virtualization 'kvm'. lsmod | grep virt virtio_balloon 13664 0 virtio_blk 18156 5 virtio_console 28114 0 virtio_net 28024 0 virtio_pci 22913 0 virtio_ring 21524 5 virtio_blk,virtio_net,virtio_pci,virtio_balloon virtio_console virtio 15008 5 virtio_blk,virtio_net,virtio_pci,virtio_balloon virtio_console lspci | grep -i virt 00:03.0 Ethernet controller: Red Hat, Inc Virtio network device 00:04.0 Communication controller: Red Hat, Inc Virtio console 00:06.0 SCSI storage controller: Red Hat, Inc Virtio block device 00:07.0 Unclassified device [00ff]: Red Hat, Inc Virtio memory balloon 00:09.0 Ethernet controller: Red Hat, Inc Virtio network device Not to doubt anyone, I am just wanting to understand this fully., Thanks --Jim -----Original Message----- From: Paolo Bonzini [mailto:paolo.bonzini@xxxxxxxxx] On Behalf Of Paolo Bonzini Sent: Friday, March 31, 2017 7:14 AM To: James Okken; kvm@xxxxxxxxxxxxxxx; kvm-owner@xxxxxxxxxxxxxxx Subject: Re: CentOS 7.2 HVM, PVM and/or PVHVM On 30/03/2017 17:44, James Okken wrote: > Sorry I just hijacked that thread, I meant to change the subject before I sent! > >>>>>>> > hi all, > > I have this nagging question I'm hoping someone could clear up for me. There is so much information and discussion out there regarding HVM, PVM and PVHVM it is hard to get any concrete understanding of what I'm actually using. > > I thought I understood that my KVM deployment on CentOS 7.2 was creating PVM VMs. KVM only has HVM. PVM and PVHVM are Xen concepts. Paolo > Checking dmesg, lspci, lsmod of the running centos7 VMs all indications show the VMs are PVMs. > > But when I look at the XML of the VMs I see: <type arch='x86_64' machine='pc-i440fx-rhel7.0.0'>hvm</type> > > Does that <type>hvm</type> mean I am mistaken? > > Thanks > <<<<<< >
