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    md/raid10: add failfast handling for writes. · 1919cbb2
    NeilBrown 提交于
    When writing to a fastfail device, we use MD_FASTFAIL unless
    it is the only device being written to.  For
    resync/recovery, assume there was a working device to read
    from so always use MD_FASTFAIL.
    
    If a write for resync/recovery fails, we just fail the
    device - there is not much else to do.
    
    If a normal write fails, but the device cannot be marked
    Faulty (must be only one left), we queue for write error
    handling which calls narrow_write_error() to write the block
    synchronously without any failfast flags.
    Signed-off-by: NNeilBrown <neilb@suse.com>
    Signed-off-by: NShaohua Li <shli@fb.com>
    1919cbb2
raid10.c 132.8 KB