I have a hack I did in cifs/ncpfs which adds a few files in the root of the mounted directory additional to those from the remote server. These could easily be a directory heirarchy like /proc however I am not sure how relevant it would be in u9fs (I am using lib9p).
If you plan to access this from Plan9 I would suggest a file server which mounts its own /proc before of the remote linux /proc and does the translation - fairly straigntforward. If you want to do this using u9fs and v9fs (as I suspect) then this doesn't help. Havn't helped much, sorry. -Steve
