Le 04/21/2016 à 10:35 AM, One Thousand Gnomes a écrit : >> But if I try to copy_from_user (using the address coming from userland, the >> one passed to get_user_pages), the data has not been written and I see the >> memset value. >> >> I manage to build a test case that fails all the time, but never at the same >> offset within the buffer. >> It's always in the middle (never at the start nor end), for a few pages long >> (varies between runs). > Always page aligned, always cache line aligned or arbitrarily aligned ? > > Alan It's always page aligned for both start and end (meaning last "untransferred" byte is the last byte of a page)
Nicolas
