This is basically an exposition of the paper "Frobenius and Valuation Rings" by Rankeya Datta and Karen Smith. We shall look at the interaction of non-Noetherian valuation rings (i.e., non-DVRs) in char p with the Frobenius endomorphism and give an example of a non-excellent DVR arising as a valuation ring in a function field. We shall also look at a necessary and sufficient condition for a valuation to be Abhyankar.