Comment 6 for bug 576041

Peter, as I mailed.

There seems to be 2 type of problems.

1.
I cannot improve innodb_buffer_pool_pages_index if you want columns as it is.
needs to remove name information (db, table, index). To pickup name, dict_sys is needed and
the looking up is slow to be used for all of blocks in BP.

2.
i_s_innodb_buffer_pool_pages.patch
uses mutex in wrong order and may cause deadlock in worse.

I will fix 2. but I cannot fix 1 without contract of function.