Variable: desktop-modes-not-to-save
desktop-modes-not-to-save is a customizable variable defined in
desktop.el.gz.
Value
(tags-table-mode)
Documentation
List of major modes whose buffers should not be saved.
Source Code
;; Defined in /usr/src/emacs/lisp/desktop.el.gz
;; We skip TAGS files to save time (tags-file-name is saved instead).
(defcustom desktop-modes-not-to-save
'(tags-table-mode)
"List of major modes whose buffers should not be saved."
:type '(repeat symbol))