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    Btrfs: async transaction commit · bb9c12c9
    Sage Weil 提交于
    Add support for an async transaction commit that is ordered such that any
    subsequent operations will join the following transaction, but does not
    wait until the current commit is fully on disk.  This avoids much of the
    latency associated with the btrfs_commit_transaction for callers concerned
    with serialization and not safety.
    
    The wait_for_unblock flag controls whether we wait for the 'middle' portion
    of commit_transaction to complete, which is necessary if the caller expects
    some of the modifications contained in the commit to be available (this is
    the case for subvol/snapshot creation).
    Signed-off-by: NSage Weil <sage@newdream.net>
    Signed-off-by: NChris Mason <chris.mason@oracle.com>
    bb9c12c9
disk-io.c 69.6 KB