Gayatri Kammela of Intel posted a new feature patch to LUV: the netconsole. From the patch’s comments:
This is about adding a Linux feature called Netconsole in Linux* UEFI Validation. In LUV netconsole feature is enabled only for the test suites that run once the Linux takes control over and BITS test suite will be excluded from having this kind of support.
Why this feature: Netconsole in LUV help us debug the kernel panics or system hangs by sending not only kernel messages but also information regarding the running tests simultaneously on to the remote machine via ethernet. Now the remote machine can be on same subnet or different subnet with respective to the local machine ( machine you are trying to boot LUV). To enable netconsole feature in LUV, changes are made in various files to include kernel modules like netconsole and different network utilites that can send messages via ethernet.Besides these changes are made to luv-test-manger to make all the running tests information sent to dmesg to make the debugging more easy.
How this feature works: Liberty is given to user to choose the ip address and port number where he/she wants all messages to sent to. once decided , user can replace the dummy ip address given in grub.cfg as @,64001@10.11.12.13/ with the destined address and port number. The same information is mentioned in README file , so that user can get to know the usage of netconsole.
Requirements for this feature: Not many changes are required for this feature , except enabling some of the kernel config options. Luv kernel has config optons enabled that are obsolutely necessary for the image and to keep the kernel size as low as possible. Since netconsole require lot of options enabled related to TCP/IP , IPV4 , IPV6 and filesystem related options. These information can be overwhelming and just for the sake of clarity some of the important options that needs to enabled are given below […]
See checkin post for full comment and sources:
https://lists.01.org/mailman/listinfo/luv
Firmware Security 