All-knowing requires knowledge of the future in its entirety, does it not?
Yes.
Did an all-knowing God create something which he could not know -purposefully becoming not all-knowing to a certain degree?
Exo 16:4 Then said the LORD unto Moses, Behold, I will rain bread from heaven for you; and the people shall go out and gather a certain rate every day, that I may prove them, whether they will walk in my law, or no.
Gen 22:12 And he said, Lay not thine hand upon the lad, neither do thou any thing unto him: for now I know that thou fearest God, seeing thou hast not withheld thy son, thine only son from me.
Isa 46:8 Remember this, and shew yourselves men: bring it again to mind, O ye transgressors.
Isa 46:9 Remember the former things of old: for I am God, and there is none else; I am God, and there is none like me,
Isa 46:10 Declaring the end from the beginning, and from ancient times the things that are not yet done, saying, My counsel shall stand, and I will do all my pleasure:
Eze 36:25 Then will I sprinkle clean water upon you, and ye shall be clean: from all your filthiness, and from all your idols, will I cleanse you.
Eze 36:26 A new heart also will I give you, and a new spirit will I put within you: and I will take away the stony heart out of your flesh, and I will give you an heart of flesh.
Eze 36:27 And I will put my spirit within you, and cause you to walk in my statutes, and ye shall keep my judgments, and do them.
Eze 36:28 And ye shall dwell in the land that I gave to your fathers; and ye shall be my people, and I will be your God.