Stefan Monnier wrote on 23 Nov 2013:
>> You can (add-to-list 'desktop-locals-to-save 'mark-ring) and it works, so
>> long as you have the fix for bug 13951 applied. But it's very verbose; for
>> each element of mark-ring for each buffer, it writes an entry like
>> (let ((mk (make-marker))) (add-hook 'desktop-delay-hook (list 'lambda '()
>> (list 'set-marker mk 123 '(get-buffer "init.el")))) mk)
[snip]
> Having special-case code to print&read some variables is not in itself
> a bad idea, but I think we should do it via a table mapping variables to
> ad-hoc massaging functions.

Ok. Updated patch attached below.

This is more complex than my original patch, but it does what you want (IIUC what you want).