kernel/Documentation/ABI/obsolete/proc-sys-vm-nr_pdflush_threads

   1 What:           /proc/sys/vm/nr_pdflush_threads
   2 Date:           June 2012
   3 Contact:        Wanpeng Li <liwp@linux.vnet.ibm.com>
   4 Description: Since pdflush is replaced by per-BDI flusher, the interface of old pdflush
   5              exported in /proc/sys/vm/ should be removed.