For really large file systems or for small memory
machines, the algorithms in fsck_ffs will inevitably
run out of memory. It appears that there are two
possibilities to deal with this:
1) multiple sub-passes over the file system,
dealing with parts of the data each time
2) modifying the ffs on-disk structure to add
enough space reserved for fsck to store needed
information during its run
There may be more, but I believe that in the long
run something on the order of 1 or 2 will be necessary.
I have some ideas about how to implement either one
if there's any interest. Otherwise it'll wait until
the indefinite future.
geoff steckel
