In current do_migrate_pages(),if from_nodes and to_nodes have some
intersect nodes,pages in these intersect nodes will also be
migrated.
eg. Assume that, from_nodes: 1,2,3,4 to_nodes: 2,3,4,5. Then these
migrates will happen:
migrate_pages(4,5);
migrate_pages(3,4);
migrate_pages(2,3);
migrate_pages(1,2);
But the user just want all pages in from_nodes move to to_nodes,
only migrate(1,2)(ignore the intersect nodes.) can satisfied
the user's request.
I amn't sure what's migrate_page's semantic.
Hoping for your suggestions.
Signed-off-by: Bob Liu <lliubbo@xxxxxxxxx>
---
mm/mempolicy.c | 7 ++-----
1 files changed, 2 insertions(+), 5 deletions(-)
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 08f40a2..c6dd931 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -922,7 +922,7 @@ int do_migrate_pages(struct mm_struct *mm,
* moved to an empty node, then there is nothing left worth migrating.
*/
- tmp = *from_nodes;
+ nodes_andnot(tmp, *from_nodes, *to_nodes);
while (!nodes_empty(tmp)) {
int s,d;
int source = -1;
@@ -935,10 +935,7 @@ int do_migrate_pages(struct mm_struct *mm,
source = s; /* Node moved. Memorize */
dest = d;
-
- /* dest not in remaining from nodes? */
- if (!node_isset(dest, tmp))
- break;
+ break;
}
if (source == -1)
break;
--
1.5.6.3
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@xxxxxxxxxx For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>