[Rails] Forcing a reload for all user sessions

I'm storing some user info in session (like the name, using cookies), in Ruby on Rails 3.2

• Let's suppose the user opens the site in two different browsers, and logs in.
• He changes his name in one browser, and switches to the other browser and refreshes the page.
• The second browser still shows the old name, because it is stored in session.

How can I force a refresh in all sessions? Is this possible?

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