System no response problem

[lhmwzy]

It has serveral times run into no responese problem.
the console messages are:
cache_lock blocked on 0xffffffe085065430 80000001 "blocklist.RSA-2048"
swap_pager: indefinite wait buffer: offset: 416837632,size:4096
swap_pager: indefinite wait buffer: offset: 416837632,size:4096
swap_pager: indefinite wait buffer: offset: 416837632,size:4096
swap_pager: indefinite wait buffer: offset: 416837632,size:4096
swap_pager: indefinite wait buffer: offset: 416837632,size:4096
swap_pager: indefinite wait buffer: offset: 416837632,size:4096
swap_pager: indefinite wait buffer: offset: 416837632,size:4096
swap_pager: indefinite wait buffer: offset: 416837632,size:4096
swap_pager: indefinite wait buffer: offset: 416837632,size:4096
.....

nodump and can't login in through ssh or console.
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