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    Btrfs: cache extent state when writing out dirty metadata pages · e6138876
    Josef Bacik 提交于
    Everytime we write out dirty pages we search for an offset in the tree,
    convert the bits in the state, and then when we wait we search for the
    offset again and clear the bits.  So for every dirty range in the io tree we
    are doing 4 rb searches, which is suboptimal.  With this patch we are only
    doing 2 searches for every cycle (modulo weird things happening).  Thanks,
    Signed-off-by: NJosef Bacik <jbacik@fusionio.com>
    e6138876
transaction.c 46.4 KB