• Josef Bacik's avatar
    Btrfs: try to keep a healthy ratio of metadata vs data block groups · 97e728d4
    Josef Bacik authored
    
    
    This patch makes the chunk allocator keep a good ratio of metadata vs data
    block groups.  By default for every 8 data block groups, we'll allocate 1
    metadata chunk, or about 12% of the disk will be allocated for metadata.  This
    can be changed by specifying the metadata_ratio mount option.
    
    This is simply the number of data block groups that have to be allocated to
    force a metadata chunk allocation.  By making sure we allocate metadata chunks
    more often, we are less likely to get into situations where the whole disk
    has been allocated as data block groups.
    Signed-off-by: default avatarJosef Bacik <jbacik@redhat.com>
    Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
    97e728d4
ctree.h 71.1 KB