• Dave Chinner's avatar
    GFS2: introduce AIL lock · d6a079e8
    Dave Chinner authored
    The log lock is currently used to protect the AIL lists and
    the movements of buffers into and out of them. The lists
    are self contained and no log specific items outside the
    lists are accessed when starting or emptying the AIL lists.
    
    Hence the operation of the AIL does not require the protection
    of the log lock so split them out into a new AIL specific lock
    to reduce the amount of traffic on the log lock. This will
    also reduce the amount of serialisation that occurs when
    the gfs2_logd pushes on the AIL to move it forward.
    
    This reduces the impact of log pushing on sequential write
    throughput.
    Signed-off-by: default avatarDave Chinner <dchinner@redhat.com>
    Signed-off-by: default avatarSteven Whitehouse <swhiteho@redhat.com>
    d6a079e8
lops.c 19 KB