A Charedi news website reported [I was directed by a blog] that last Wednesday, on the 3rd of Av, in the middle of the 9 days, when Rav Kanievsky Shlit"a awoke from his short afternoon nap, he asked his grandson Rav Gedalia Honigsberg Shlit"a to get him some wine.
Rav Honigsberg was surprised at this request since it was in the middle of the 9 days. He didn't think that there would be a Siyum so soon since Rav Kanievsky makes a Siyum on Yevamot only on Erev Tish'a Be'av, which is 5 days later. Confused, he asked his grandfather what the occasion was.
To Rav Honigsberg's astonishment, Rav Kanievsky told him that he completed Mesechet Berachot in a dream he had while sleeping. When Rav Honigsberg asked how long it took, Rav Kanievsky replied in Yiddish, "Freg nisht tzu fil" (don't ask so much).