May I suggest an improvement?
Instead of setting an arbitrary value, which is always wrong, you can set as a sentinel value 0 for 'All' and manage server-side, correctly. On the other hand, often in paging systems, it works without having to do anything.

rowList: [5, 10, 20, 50, 1000, 0],
pager: '#pager

$("#pager option[value=0]").text('All');