[PATCH v3 0/3] some fixes and clean up for mempolicy

From: Yisheng Xie
Date: Thu Nov 16 2017 - 20:50:01 EST

This patchset is triggered by Xiojun's report of ltp test fail[1],
and I have sent a patch to resolve it by check nodes_empty of new_nodes[2].

The new version is to follow Vlastimil's suggestion, which fix by checking
the new_nodes value in function get_nodes. And I just split them to small
patches for easy to review and discussion. For more detail, please look
into each patches.

Change logs of v3:
* remove patch get_nodes's mask miscalculation
* check whether node is empty after AND current task node, and then nodes
which have memory.

Change logs of v2:
* fix get_nodes's mask miscalculation
* remove redundant check in get_nodes
* fix the check of nodemask from user - per Vlastimil

Any comment and complain is welome.

Yisheng Xie

[1] https://patchwork.kernel.org/patch/10012005/
[2] https://patchwork.kernel.org/patch/10013329/

Yisheng Xie (3):
mm/mempolicy: remove redundant check in get_nodes
mm/mempolicy: fix the check of nodemask from user
mm/mempolicy: add nodes_empty check in SYSC_migrate_pages

mm/mempolicy.c | 35 +++++++++++++++++++++++++++--------
1 file changed, 27 insertions(+), 8 deletions(-)