Hello, Just a bump:) I am hoping this is the right list to ask the question...
MW. On Fri, Jun 6, 2014 at 7:15 PM, Marcus White <[email protected]> wrote: > Hello > I had some basic questions, was asking them on the kvm list but it > probably makes more sense here:) > > The questions are about virtio-scsi. I would appreciate any help. > > 1. Is virtio-scsi via QEMU a zero copy operation from guest to disk? > The vhost-LIO as I understand it is zero copy, wasnt sure about QEMU. > With the VM and the QEMU thread part of the same process, it would be > good to know the flow and where the copies occur, if they do. > > 2. When the block layer underneath QEMU(assuming the QEMU does talk to > the block device and not sg, for example), if an error code comes in, > is it converted to a SCSI response before being passed to the guest? > > 3. Are there any other performance tweaks that would help in both the > QEMU case and the LIO case? > > Thanks in advance:) > MW _______________________________________________ Devel mailing list [email protected] http://lists.ovirt.org/mailman/listinfo/devel
