• Song Liu's avatar
    md: introduce new personality funciton start() · d5d885fd
    Song Liu authored
    In do_md_run(), md threads should not wake up until the array is fully
    initialized in md_run(). However, in raid5_run(), raid5-cache may wake
    up mddev->thread to flush stripes that need to be written back. This
    design doesn't break badly right now. But it could lead to bad bug in
    the future.
    
    This patch tries to resolve this problem by splitting start up work
    into two personality functions, run() and start(). Tasks that do not
    require the md threads should go into run(), while task that require
    the md threads go into start().
    
    r5l_load_log() is moved to raid5_start(), so it is not called until
    the md threads are started in do_md_run().
    Signed-off-by: default avatarSong Liu <songliubraving@fb.com>
    Signed-off-by: default avatarShaohua Li <shli@fb.com>
    d5d885fd
dm-raid.c 113 KB