• Artem Bityutskiy's avatar
    jffs2: get rid of jffs2_sync_super · 8bdc81c5
    Artem Bityutskiy authored
    Currently JFFS2 file-system maps the VFS "superblock" abstraction to the
    write-buffer. Namely, it uses VFS services to synchronize the write-buffer
    periodically.
    
    The whole "superblock write-out" VFS infrastructure is served by the
    'sync_supers()' kernel thread, which wakes up every 5 (by default) seconds and
    writes out all dirty superblock using the '->write_super()' call-back. But the
    problem with this thread is that it wastes power by waking up the system every
    5 seconds no matter what. So we want to kill it completely and thus, we need to
    make file-systems to stop using the '->write_super' VFS service, and then
    remove it together with the kernel thread.
    
    This patch switches the JFFS2 write-buffer management from
    '->write_super()'/'->s_dirt' to a delayed work. Instead of setting the 's_dirt'
    flag we just schedule a delayed work for synchronizing the write-buffer.
    Signed-off-by: default avatarArtem Bityutskiy <artem.bityutskiy@linux.intel.com>
    Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    8bdc81c5
wbuf.c 37.3 KB