• NeilBrown's avatar
    md: Relax minimum size restrictions on chunk_size. · 4bbf3771
    NeilBrown authored
    Currently, the 'chunk_size' of an array must be at-least PAGE_SIZE.
    
    This makes moving an array to a machine with a larger PAGE_SIZE, or
    changing the kernel to use a larger PAGE_SIZE, can stop an array from
    working.
    
    For RAID10 and RAID4/5/6, this is non-trivial to fix as the resync
    process works on whole pages at a time, and assumes them to be wholly
    within a stripe.  For other raid personalities, this restriction is
    not needed at all and can be dropped.
    
    So remove the test on chunk_size from common can, and add it in just
    the places where it is needed: raid10 and raid4/5/6.
    Signed-off-by: default avatarNeilBrown <neilb@suse.de>
    4bbf3771
raid5.c 133 KB