K 10
svn:author
V 3
mjg
K 8
svn:date
V 27
2017-12-31T03:35:34.941880Z
K 7
svn:log
V 809
MFC r323235,r323236,r324789,r324863:

    Introduce __read_frequently

    While __read_mostly groups variables together, their placement is not
    specified. In particular 2 frequently used variables can end up in
    different lines.

    This annotation is only expected to be used for variables read all the time,
    e.g. on each syscall entry.

=============

    Sprinkle __read_frequently on few obvious places.

    Note that some of annotated variables should probably change their types
    to something smaller, preferably bit-sized.

=============

    Mark kdb_active as __read_frequently and switch to bool to eat less space.

=============

    Change kdb_active type to u_char.

    Fixes warnings from gcc and keeps the small size. Perhaps nesting should be moved
    to another variablle.

END