[uml-user] Trouble mounting root filesystem

[Tom P. <tpa...@vt...>]

I'm doing some stuff with UML for my professor, and I got it running on my 
computers, but I can't get it to run on his. When I run
./linux ubd0=cow_root_fs,root_fs
It stops at whatever message comes before "VFS: Mounted root (ext2 
filesystem) readonly." I've tried deleting the cow file, setting the ubd0 
option to just "root_fs", etc. When I run my home computer with the same 
setup, both outputs match until I get to the line "VFS: Mounted root (ext2 
filesystem) readonly." on my home computer. Before printing this message, my 
prof's computer just stops. I have to switch to a different terminal and 
"killall -9 linux" (it doesn't work if I don't use the "-9" option).

Both computers are working off of identical root filesystems. I've tried 
recompiling UML on my prof's computer and that hasn't helped. The only 
message in the output that looks suspicious is:
"devfs: devfs_do_symlink(mmapper): entry already exists"
which shows up just before the UML kernel examines the root_fs file. But both 
computers have this error message, and one boots and the other doesn't, so I 
don't think it's the problem.

Does anyone have any suggestions?
Tom Panning
tpa...@vt...