Calling rcu_barrier() allows all of the rcu-freed memory to be actually returned to the pool, and allows nr_allocated to return to 0. As well as allowing diffs between runs to be more useful, it also lets us pinpoint leaks more effectively. Link: http://lkml.kernel.org/r/1480369871-5271-44-git-send-email-mawilcox@linuxonhyperv.com Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com> Tested-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Konstantin Khlebnikov <koct9i@gmail.com> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Cc: Matthew Wilcox <mawilcox@microsoft.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

All merge conflicts were simple overlapping changes. Signed-off-by: David S. Miller <davem@davemloft.net>