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-rw-r--r--mm/memcontrol.c5
-rw-r--r--mm/rmap.c30
-rw-r--r--mm/vmscan.c4
3 files changed, 31 insertions, 8 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 10833d969e3f..ff7cac602984 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -110,6 +110,11 @@ struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p)
110 struct mem_cgroup, css); 110 struct mem_cgroup, css);
111} 111}
112 112
113inline struct mem_cgroup *mm_cgroup(struct mm_struct *mm)
114{
115 return rcu_dereference(mm->mem_cgroup);
116}
117
113void mm_init_cgroup(struct mm_struct *mm, struct task_struct *p) 118void mm_init_cgroup(struct mm_struct *mm, struct task_struct *p)
114{ 119{
115 struct mem_cgroup *mem; 120 struct mem_cgroup *mem;
diff --git a/mm/rmap.c b/mm/rmap.c
index 4a3487921eff..a0e92a263d12 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -302,7 +302,8 @@ out:
302 return referenced; 302 return referenced;
303} 303}
304 304
305static int page_referenced_anon(struct page *page) 305static int page_referenced_anon(struct page *page,
306 struct mem_cgroup *mem_cont)
306{ 307{
307 unsigned int mapcount; 308 unsigned int mapcount;
308 struct anon_vma *anon_vma; 309 struct anon_vma *anon_vma;
@@ -315,6 +316,13 @@ static int page_referenced_anon(struct page *page)
315 316
316 mapcount = page_mapcount(page); 317 mapcount = page_mapcount(page);
317 list_for_each_entry(vma, &anon_vma->head, anon_vma_node) { 318 list_for_each_entry(vma, &anon_vma->head, anon_vma_node) {
319 /*
320 * If we are reclaiming on behalf of a cgroup, skip
321 * counting on behalf of references from different
322 * cgroups
323 */
324 if (mem_cont && (mm_cgroup(vma->vm_mm) != mem_cont))
325 continue;
318 referenced += page_referenced_one(page, vma, &mapcount); 326 referenced += page_referenced_one(page, vma, &mapcount);
319 if (!mapcount) 327 if (!mapcount)
320 break; 328 break;
@@ -335,7 +343,8 @@ static int page_referenced_anon(struct page *page)
335 * 343 *
336 * This function is only called from page_referenced for object-based pages. 344 * This function is only called from page_referenced for object-based pages.
337 */ 345 */
338static int page_referenced_file(struct page *page) 346static int page_referenced_file(struct page *page,
347 struct mem_cgroup *mem_cont)
339{ 348{
340 unsigned int mapcount; 349 unsigned int mapcount;
341 struct address_space *mapping = page->mapping; 350 struct address_space *mapping = page->mapping;
@@ -368,6 +377,13 @@ static int page_referenced_file(struct page *page)
368 mapcount = page_mapcount(page); 377 mapcount = page_mapcount(page);
369 378
370 vma_prio_tree_foreach(vma, &iter, &mapping->i_mmap, pgoff, pgoff) { 379 vma_prio_tree_foreach(vma, &iter, &mapping->i_mmap, pgoff, pgoff) {
380 /*
381 * If we are reclaiming on behalf of a cgroup, skip
382 * counting on behalf of references from different
383 * cgroups
384 */
385 if (mem_cont && (mm_cgroup(vma->vm_mm) != mem_cont))
386 continue;
371 if ((vma->vm_flags & (VM_LOCKED|VM_MAYSHARE)) 387 if ((vma->vm_flags & (VM_LOCKED|VM_MAYSHARE))
372 == (VM_LOCKED|VM_MAYSHARE)) { 388 == (VM_LOCKED|VM_MAYSHARE)) {
373 referenced++; 389 referenced++;
@@ -390,7 +406,8 @@ static int page_referenced_file(struct page *page)
390 * Quick test_and_clear_referenced for all mappings to a page, 406 * Quick test_and_clear_referenced for all mappings to a page,
391 * returns the number of ptes which referenced the page. 407 * returns the number of ptes which referenced the page.
392 */ 408 */
393int page_referenced(struct page *page, int is_locked) 409int page_referenced(struct page *page, int is_locked,
410 struct mem_cgroup *mem_cont)
394{ 411{
395 int referenced = 0; 412 int referenced = 0;
396 413
@@ -402,14 +419,15 @@ int page_referenced(struct page *page, int is_locked)
402 419
403 if (page_mapped(page) && page->mapping) { 420 if (page_mapped(page) && page->mapping) {
404 if (PageAnon(page)) 421 if (PageAnon(page))
405 referenced += page_referenced_anon(page); 422 referenced += page_referenced_anon(page, mem_cont);
406 else if (is_locked) 423 else if (is_locked)
407 referenced += page_referenced_file(page); 424 referenced += page_referenced_file(page, mem_cont);
408 else if (TestSetPageLocked(page)) 425 else if (TestSetPageLocked(page))
409 referenced++; 426 referenced++;
410 else { 427 else {
411 if (page->mapping) 428 if (page->mapping)
412 referenced += page_referenced_file(page); 429 referenced +=
430 page_referenced_file(page, mem_cont);
413 unlock_page(page); 431 unlock_page(page);
414 } 432 }
415 } 433 }
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 7408a8a7d882..215f6a726b2f 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -503,7 +503,7 @@ static unsigned long shrink_page_list(struct list_head *page_list,
503 goto keep_locked; 503 goto keep_locked;
504 } 504 }
505 505
506 referenced = page_referenced(page, 1); 506 referenced = page_referenced(page, 1, sc->mem_cgroup);
507 /* In active use or really unfreeable? Activate it. */ 507 /* In active use or really unfreeable? Activate it. */
508 if (sc->order <= PAGE_ALLOC_COSTLY_ORDER && 508 if (sc->order <= PAGE_ALLOC_COSTLY_ORDER &&
509 referenced && page_mapping_inuse(page)) 509 referenced && page_mapping_inuse(page))
@@ -1057,7 +1057,7 @@ force_reclaim_mapped:
1057 if (page_mapped(page)) { 1057 if (page_mapped(page)) {
1058 if (!reclaim_mapped || 1058 if (!reclaim_mapped ||
1059 (total_swap_pages == 0 && PageAnon(page)) || 1059 (total_swap_pages == 0 && PageAnon(page)) ||
1060 page_referenced(page, 0)) { 1060 page_referenced(page, 0, sc->mem_cgroup)) {
1061 list_add(&page->lru, &l_active); 1061 list_add(&page->lru, &l_active);
1062 continue; 1062 continue;
1063 } 1063 }