user-level: 0.782 register: 0.767 semantic: 0.676 mistranslation: 0.656 graphic: 0.631 ppc: 0.625 hypervisor: 0.624 peripherals: 0.617 device: 0.599 debug: 0.596 TCG: 0.593 performance: 0.590 assembly: 0.580 virtual: 0.579 network: 0.560 PID: 0.545 risc-v: 0.538 vnc: 0.534 boot: 0.534 KVM: 0.512 permissions: 0.511 arm: 0.506 VMM: 0.500 kernel: 0.477 files: 0.464 architecture: 0.458 socket: 0.441 x86: 0.413 i386: 0.316 Connection error when use PXE+NFS to boot guest I use NFS+PXE to boot RHEL 5. The installation is slow, and I send Ctrl+Alt+F4, then find that half (but not all) of connections are dropped: nfs: server 192.168.122.50 OK nfs: server 192.168.122.50 OK nfs: server 192.168.122.50 OK nfs: server 192.168.122.50 not responding, still trying nfs: server 192.168.122.50 OK nfs: server 192.168.122.50 not responding, still trying nfs: server 192.168.122.50 not responding, still trying : : I have checked that there is no IP conflict. Host machine Kernel: 2.6.32.9-70.fc12.x86_64 QEMU version: 0.12.3-2.fc12.x86_64 libvirt version: 0.7.1-15.fc12.x86_64 Guest machine 1 (NFS server) Kernel: 2.6.18-164.el5 nfs-utils version: 1.0.9-42.el5 Set up command: virt-install --connect qemu:///system -n m5 --vnc --accelerate --ram=256 --noreboot --os-type=linux --pxe --os-variant=rhel5 --mac=52:54:00:50:00:00 --file=/dev/VolGroup00/m5 Guest machine 2 (the machine to be installed via PXE+NFS) Set up command: virt-install --connect qemu:///system -n e51 --vnc --accelerate --ram=128 --noreboot --os-type=linux --pxe –os-variant=rhel5 --mac=52:54:00:51:01:00 --file=/dev/VolGroup00/e51 ============================================================================ I try to use NFS under different situations to test. Test 1) Try normal NFS mount. This test successes. Test 2) Try to boot a diskless machine via PXE, use a NFS mount point at root. This test suffers the same problem At test 1) NFS client mount an export of the NFS server, and use command "find ." to see if it runs smoothly. Result: it runs smoothly for thousands of lines. Guest machine 3 (NFS server) Kernel: 2.6.18-164.el5 Set up command: virt-install --connect qemu:///system -n dm1 --vnc --accelerate --ram=256 --noreboot --os-type=linux --pxe --os-variant=rhel5 --mac=52:54:00:d1:00:00 --file=/dev/VolGroup00/dm1 NFS client is Guest machine 1 mentioned before. At test 2) Set up a PXE server, write a customized initrd, in which init script uses "mkrootdev -t nfs -o nolock,ro" to set root directory on a NFS mount. Result: the client machine can boot, but very slowly, with numerous nfs: server 192.168.122.110 OK nfs: server 192.168.122.110 not responding, still trying NFS server: it is Guest machine 3 Client to be booted: Guest machine 4 Set up command: virt-install --connect qemu:///system -n de11 --vnc --accelerate --ram=128 --noreboot --os-type=linux --pxe –os-variant=rhel5 --nodisk --mac=52:54:00:d1:01:00 I have also tried to use qemu 0.11.0 and 0.10-16, the bugs are the same. I have seen similar bug report in the following. Although they said the bug is fixed in version >= 0.11.1, but I still find them at 0.12 http://