'^z bg' ought to work to put it into the background.
However, it may be that bzr doesn't update the working tree until it's
finished repacking, in which case the users won't actually be able to
continue with their work until it completes. Possibly we should do
all the stuff the user cares about first and then repack last of all.
Then they can background it, minimize the window, or whatever, and let
it run. Or we could even optionally background ourselves.
'^z bg' ought to work to put it into the background.
However, it may be that bzr doesn't update the working tree until it's
finished repacking, in which case the users won't actually be able to
continue with their work until it completes. Possibly we should do
all the stuff the user cares about first and then repack last of all.
Then they can background it, minimize the window, or whatever, and let
it run. Or we could even optionally background ourselves.
Martin