mm: numa: Add THP migration for the NUMA working set scanning fault case.

[platform/adaptation/renesas_rcar/renesas_kernel.git] / mm / memcontrol.c

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index dd39ba0..d97af96 100644 (file)
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -3288,15 +3288,18 @@ void mem_cgroup_prepare_migration(struct page *page, struct page *newpage,
                                  struct mem_cgroup **memcgp)
 {
        struct mem_cgroup *memcg = NULL;
+       unsigned int nr_pages = 1;
        struct page_cgroup *pc;
        enum charge_type ctype;
 
        *memcgp = NULL;
 
-       VM_BUG_ON(PageTransHuge(page));
        if (mem_cgroup_disabled())
                return;
 
+       if (PageTransHuge(page))
+               nr_pages <<= compound_order(page);
+
        pc = lookup_page_cgroup(page);
        lock_page_cgroup(pc);
        if (PageCgroupUsed(pc)) {
@@ -3358,7 +3361,7 @@ void mem_cgroup_prepare_migration(struct page *page, struct page *newpage,
         * charged to the res_counter since we plan on replacing the
         * old one and only one page is going to be left afterwards.
         */
-       __mem_cgroup_commit_charge(memcg, newpage, 1, ctype, false);
+       __mem_cgroup_commit_charge(memcg, newpage, nr_pages, ctype, false);
 }
 
 /* remove redundant charge if migration failed*/