From: xu xin <xu.xin16@zte.com.cn>

There are two perfomance optimization patches for rmap_walk_ksm.

The patch [1/2] move the initializaion of addr from the position inside loop
to the position before the loop, since the variable will not change in the
loop.

The patch [2/2] optimize rmap_walk_ksm by passing a suitable page offset range
to the anon_vma_interval_tree_foreach loop to reduce ineffective checks.

The metric performance is seen at patch[2/2].

xu xin (2):
  ksm: Initialize the addr only once in rmap_walk_ksm
  ksm: Optimize rmap_walk_ksm by passing a suitable address range

 mm/ksm.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

-- 
2.25.1