• Matthew Wilcox's avatar
    xarray: Replace exceptional entries · 3159f943
    Matthew Wilcox authored
    Introduce xarray value entries and tagged pointers to replace radix
    tree exceptional entries.  This is a slight change in encoding to allow
    the use of an extra bit (we can now store BITS_PER_LONG - 1 bits in a
    value entry).  It is also a change in emphasis; exceptional entries are
    intimidating and different.  As the comment explains, you can choose
    to store values or pointers in the xarray and they are both first-class
    Signed-off-by: default avatarMatthew Wilcox <willy@infradead.org>
    Reviewed-by: default avatarJosef Bacik <jbacik@fb.com>
mincore.c 6.7 KB