other: 0.103 device: 0.099 boot: 0.081 semantic: 0.079 PID: 0.076 performance: 0.075 vnc: 0.070 network: 0.066 permissions: 0.065 debug: 0.063 socket: 0.061 files: 0.055 KVM: 0.055 graphic: 0.052 boot: 0.351 socket: 0.175 network: 0.150 debug: 0.113 vnc: 0.062 PID: 0.039 other: 0.021 performance: 0.019 device: 0.019 files: 0.017 KVM: 0.013 semantic: 0.009 graphic: 0.008 permissions: 0.005 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://