• Lukas Czerner's avatar
    ext4: Use schedule_timeout_interruptible() for waiting in lazyinit thread · 4ed5c033
    Lukas Czerner authored
    In order to make lazyinit eat approx. 10% of io bandwidth at max, we
    are sleeping between zeroing each single inode table. For that purpose
    we are using timer which wakes up thread when it expires. It is set
    via add_timer() and this may cause troubles in the case that thread
    has been woken up earlier and in next iteration we call add_timer() on
    still running timer hence hitting BUG_ON in add_timer(). We could fix
    that by using mod_timer() instead however we can use
    schedule_timeout_interruptible() for waiting and hence simplifying
    things a lot.
    
    This commit exchange the old "waiting mechanism" with simple
    schedule_timeout_interruptible(), setting the time to sleep. Hence we
    do not longer need li_wait_daemon waiting queue and others, so get rid
    of it.
    
    Addresses-Red-Hat-Bugzilla: #699708
    Signed-off-by: default avatarLukas Czerner <lczerner@redhat.com>
    Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
    Reviewed-by: default avatarEric Sandeen <sandeen@redhat.com>
    4ed5c033
super.c 136 KB