• Tejun Heo's avatar
    writeback: make __wb_calc_thresh() take dirty_throttle_control · b1cbc6d4
    Tejun Heo authored
    wb_calc_thresh() calculates wb_thresh by scaling thresh according to
    the wb's portion in the system-wide write bandwidth.  cgroup writeback
    support would need to calculate wb_thresh against memcg domain too.
    This patch renames wb_calc_thresh() to __wb_calc_thresh() and makes it
    take dirty_throttle_control so that the function can later be updated
    to calculate against different domains according to
    dirty_throttle_control.
    
    wb_calc_thresh() is now a thin wrapper around __wb_calc_thresh().
    
    v2: The original version was incorrectly scaling dtc->dirty instead of
        dtc->thresh.  This was due to the extremely confusing function and
        variable names.  Added a rename patch and fixed this one.
    Signed-off-by: default avatarTejun Heo <tj@kernel.org>
    Cc: Jens Axboe <axboe@kernel.dk>
    Cc: Jan Kara <jack@suse.cz>
    Cc: Wu Fengguang <fengguang.wu@intel.com>
    Cc: Greg Thelen <gthelen@google.com>
    Signed-off-by: default avatarJens Axboe <axboe@fb.com>
    b1cbc6d4
page-writeback.c 75.8 KB