diff options
Diffstat (limited to 'mm/ksm.c')
| -rw-r--r-- | mm/ksm.c | 11 |
1 files changed, 11 insertions, 0 deletions
@@ -28,6 +28,7 @@ #include <linux/kthread.h> #include <linux/wait.h> #include <linux/slab.h> +#include <linux/memcontrol.h> #include <linux/rbtree.h> #include <linux/memory.h> #include <linux/mmu_notifier.h> @@ -1571,6 +1572,16 @@ struct page *ksm_does_need_to_copy(struct page *page, new_page = alloc_page_vma(GFP_HIGHUSER_MOVABLE, vma, address); if (new_page) { + /* + * The memcg-specific accounting when moving + * pages around the LRU lists relies on the + * page's owner (memcg) to be valid. Usually, + * pages are assigned to a new owner before + * being put on the LRU list, but since this + * is not the case here, the stale owner from + * a previous allocation cycle must be reset. + */ + mem_cgroup_reset_owner(new_page); copy_user_highpage(new_page, page, address, vma); SetPageDirty(new_page); |