• Chris Mason's avatar
    Btrfs: O_DIRECT writes via buffered writes + invaldiate · cb843a6f
    Chris Mason authored
    This reworks the btrfs O_DIRECT write code a bit.  It had always fallen
    back to buffered IO and done an invalidate, but needed to be updated
    for the data=ordered code.  The invalidate wasn't actually removing pages
    because they were still inside an ordered extent.
    This also combines the O_DIRECT/O_SYNC paths where possible, and kicks
    off IO in the main btrfs_file_write loop to keep the pipe down the the
    disk full as we process long writes.
    Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>