diff options
Diffstat (limited to 'results/classifier/accel-gemma3:12b/kvm/495566')
| -rw-r--r-- | results/classifier/accel-gemma3:12b/kvm/495566 | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/results/classifier/accel-gemma3:12b/kvm/495566 b/results/classifier/accel-gemma3:12b/kvm/495566 new file mode 100644 index 000000000..9e2c6bbd6 --- /dev/null +++ b/results/classifier/accel-gemma3:12b/kvm/495566 @@ -0,0 +1,22 @@ + +qemu network adapter initialization fails when using macaddr=<multicast MAC-address> + +Not sure if ultra-strange, nondocumented feature in qemu (or linux kernel) or really bug: Network card initialization fails if first byte of mac address is not 00. The problem occurs at least with model=pcnet/rtl8139, in both cases the network adapter is not usable. + +How to reproduce: + +* Take standard initrd/kernel (tested with hardy) + +* Start qemu (cmd see below) and enter "modprobe pcnet32" at prompt: +qemu -name SetupTest -no-acpi -m 128 -drive file=/dev/null,if=ide,index=0 -net nic,macaddr=00:22:33:44:55:66,model=pcnet -net user -kernel vmlinuz-2.6.24-26-generic -initrd initrd.img-2.6.24-26-generic -append break=premount + +You will see "pcnet32 ... at 0x..., 00:22:33:44:55:66 + +* Do same with mac address 11:22:33:44:55:66 +qemu -name SetupTest -no-acpi -m 128 -drive file=/dev/null,if=ide,index=0 -net nic,macaddr=11:22:33:44:55:66,model=pcnet -net user -kernel vmlinuz-2.6.24-26-generic -initrd initrd.img-2.6.24-26-generic -append break=premount + +You will see "pcnet32 ... at 0x..., 00:00:00:00:00:00 + +The network adapter is non-functional, "ip link set eth0 up" does not report error, but does not work (indicates at least some linux kernel influence) + +With the rtl8139 adapter, mac-address in guest is correct, but adapter does not work either (indicates qemu influence) \ No newline at end of file |