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    rbd: default to single-major device number scheme · 3cfa3b16
    Ilya Dryomov 提交于
    It's been 3.5 years, let's turn it on by default.  Support in rbd(8)
    utility goes back to pre-firefly, "rbd map" has been loading the module
    with single_major=Y ever since.  However, if the module is already
    loaded (whether by hand or at boot time), we end up with single_major=N.
    Also, some people don't install rbd(8) and use the sysfs interface
    directly.
    
    (With single-major=N, a major number is consumed for every mapping,
    imposing a limit of ~240 rbd images per host.  single-major=Y allows
    mapping thousands of rbd images on a single machine.)
    Signed-off-by: NIlya Dryomov <idryomov@gmail.com>
    Reviewed-by: NJason Dillaman <dillaman@redhat.com>
    3cfa3b16
rbd.c 165.6 KB