@Chehai Wu,
I have written about the deadlock in non-lazy drop table path here -- https://bugs.launchpad.net/percona-server/+bug/1026926
Also, as noted in the comment in other bug -- it is a regression introduced in Percona Server (due the latch ordering wrt buf_pool->page_hash_latch) , it is not present upstream.
@Chehai Wu,
I have written about the deadlock in non-lazy drop table path here -- https:/ /bugs.launchpad .net/percona- server/ +bug/1026926
Also, as noted in the comment in other bug -- it is a regression introduced in Percona Server (due the latch ordering wrt buf_pool- >page_hash_ latch) , it is not present upstream.