.vimrc 下加入如下代码即可。研究好久才找到 md

 let g:ctrlp_open_multiple_files = 'ij'
 let g:ctrlp_extensions = ['tag','buffertag','quickfix','dir','rtscript','undo','line','changes','mixed','bookmarkdir']
 let g:ctrlp_cache_dir = $HOME.'/.cache/ctrlp'

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ctrlp之后 按F5 能够进入缓存