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Diffstat (limited to 'mm/memcontrol.c')
-rw-r--r--mm/memcontrol.c88
1 files changed, 50 insertions, 38 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index c0cbd7790c5..27e9e75f4ea 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -162,6 +162,7 @@ struct page_cgroup {
};
#define PAGE_CGROUP_FLAG_CACHE (0x1) /* charged as cache */
#define PAGE_CGROUP_FLAG_ACTIVE (0x2) /* page is active in this cgroup */
+#define PAGE_CGROUP_FLAG_FILE (0x4) /* page is file system backed */
static int page_cgroup_nid(struct page_cgroup *pc)
{
@@ -177,6 +178,7 @@ enum charge_type {
MEM_CGROUP_CHARGE_TYPE_CACHE = 0,
MEM_CGROUP_CHARGE_TYPE_MAPPED,
MEM_CGROUP_CHARGE_TYPE_FORCE, /* used by force_empty */
+ MEM_CGROUP_CHARGE_TYPE_SHMEM, /* used by page migration of shmem */
};
/*
@@ -288,8 +290,12 @@ static void unlock_page_cgroup(struct page *page)
static void __mem_cgroup_remove_list(struct mem_cgroup_per_zone *mz,
struct page_cgroup *pc)
{
- int from = pc->flags & PAGE_CGROUP_FLAG_ACTIVE;
- int lru = !!from;
+ int lru = LRU_BASE;
+
+ if (pc->flags & PAGE_CGROUP_FLAG_ACTIVE)
+ lru += LRU_ACTIVE;
+ if (pc->flags & PAGE_CGROUP_FLAG_FILE)
+ lru += LRU_FILE;
MEM_CGROUP_ZSTAT(mz, lru) -= 1;
@@ -300,10 +306,12 @@ static void __mem_cgroup_remove_list(struct mem_cgroup_per_zone *mz,
static void __mem_cgroup_add_list(struct mem_cgroup_per_zone *mz,
struct page_cgroup *pc)
{
- int lru = LRU_INACTIVE;
+ int lru = LRU_BASE;
if (pc->flags & PAGE_CGROUP_FLAG_ACTIVE)
lru += LRU_ACTIVE;
+ if (pc->flags & PAGE_CGROUP_FLAG_FILE)
+ lru += LRU_FILE;
MEM_CGROUP_ZSTAT(mz, lru) += 1;
list_add(&pc->lru, &mz->lists[lru]);
@@ -314,10 +322,9 @@ static void __mem_cgroup_add_list(struct mem_cgroup_per_zone *mz,
static void __mem_cgroup_move_lists(struct page_cgroup *pc, bool active)
{
struct mem_cgroup_per_zone *mz = page_cgroup_zoneinfo(pc);
- int lru = LRU_INACTIVE;
-
- if (pc->flags & PAGE_CGROUP_FLAG_ACTIVE)
- lru += LRU_ACTIVE;
+ int from = pc->flags & PAGE_CGROUP_FLAG_ACTIVE;
+ int file = pc->flags & PAGE_CGROUP_FLAG_FILE;
+ int lru = LRU_FILE * !!file + !!from;
MEM_CGROUP_ZSTAT(mz, lru) -= 1;
@@ -326,7 +333,7 @@ static void __mem_cgroup_move_lists(struct page_cgroup *pc, bool active)
else
pc->flags &= ~PAGE_CGROUP_FLAG_ACTIVE;
- lru = !!active;
+ lru = LRU_FILE * !!file + !!active;
MEM_CGROUP_ZSTAT(mz, lru) += 1;
list_move(&pc->lru, &mz->lists[lru]);
}
@@ -391,21 +398,6 @@ int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem)
}
/*
- * This function is called from vmscan.c. In page reclaiming loop. balance
- * between active and inactive list is calculated. For memory controller
- * page reclaiming, we should use using mem_cgroup's imbalance rather than
- * zone's global lru imbalance.
- */
-long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem)
-{
- unsigned long active, inactive;
- /* active and inactive are the number of pages. 'long' is ok.*/
- active = mem_cgroup_get_all_zonestat(mem, LRU_ACTIVE);
- inactive = mem_cgroup_get_all_zonestat(mem, LRU_INACTIVE);
- return (long) (active / (inactive + 1));
-}
-
-/*
* prev_priority control...this will be used in memory reclaim path.
*/
int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
@@ -450,7 +442,7 @@ unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
unsigned long *scanned, int order,
int mode, struct zone *z,
struct mem_cgroup *mem_cont,
- int active)
+ int active, int file)
{
unsigned long nr_taken = 0;
struct page *page;
@@ -461,7 +453,7 @@ unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
int nid = z->zone_pgdat->node_id;
int zid = zone_idx(z);
struct mem_cgroup_per_zone *mz;
- int lru = !!active;
+ int lru = LRU_FILE * !!file + !!active;
BUG_ON(!mem_cont);
mz = mem_cgroup_zoneinfo(mem_cont, nid, zid);
@@ -477,6 +469,9 @@ unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
if (unlikely(!PageLRU(page)))
continue;
+ /*
+ * TODO: play better with lumpy reclaim, grabbing anything.
+ */
if (PageActive(page) && !active) {
__mem_cgroup_move_lists(pc, true);
continue;
@@ -489,7 +484,7 @@ unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
scan++;
list_move(&pc->lru, &pc_list);
- if (__isolate_lru_page(page, mode) == 0) {
+ if (__isolate_lru_page(page, mode, file) == 0) {
list_move(&page->lru, dst);
nr_taken++;
}
@@ -575,10 +570,16 @@ static int mem_cgroup_charge_common(struct page *page, struct mm_struct *mm,
* If a page is accounted as a page cache, insert to inactive list.
* If anon, insert to active list.
*/
- if (ctype == MEM_CGROUP_CHARGE_TYPE_CACHE)
+ if (ctype == MEM_CGROUP_CHARGE_TYPE_CACHE) {
pc->flags = PAGE_CGROUP_FLAG_CACHE;
- else
+ if (page_is_file_cache(page))
+ pc->flags |= PAGE_CGROUP_FLAG_FILE;
+ else
+ pc->flags |= PAGE_CGROUP_FLAG_ACTIVE;
+ } else if (ctype == MEM_CGROUP_CHARGE_TYPE_MAPPED)
pc->flags = PAGE_CGROUP_FLAG_ACTIVE;
+ else /* MEM_CGROUP_CHARGE_TYPE_SHMEM */
+ pc->flags = PAGE_CGROUP_FLAG_CACHE | PAGE_CGROUP_FLAG_ACTIVE;
lock_page_cgroup(page);
if (unlikely(page_get_page_cgroup(page))) {
@@ -737,8 +738,12 @@ int mem_cgroup_prepare_migration(struct page *page, struct page *newpage)
if (pc) {
mem = pc->mem_cgroup;
css_get(&mem->css);
- if (pc->flags & PAGE_CGROUP_FLAG_CACHE)
- ctype = MEM_CGROUP_CHARGE_TYPE_CACHE;
+ if (pc->flags & PAGE_CGROUP_FLAG_CACHE) {
+ if (page_is_file_cache(page))
+ ctype = MEM_CGROUP_CHARGE_TYPE_CACHE;
+ else
+ ctype = MEM_CGROUP_CHARGE_TYPE_SHMEM;
+ }
}
unlock_page_cgroup(page);
if (mem) {
@@ -982,14 +987,21 @@ static int mem_control_stat_show(struct cgroup *cont, struct cftype *cft,
}
/* showing # of active pages */
{
- unsigned long active, inactive;
-
- inactive = mem_cgroup_get_all_zonestat(mem_cont,
- LRU_INACTIVE);
- active = mem_cgroup_get_all_zonestat(mem_cont,
- LRU_ACTIVE);
- cb->fill(cb, "active", (active) * PAGE_SIZE);
- cb->fill(cb, "inactive", (inactive) * PAGE_SIZE);
+ unsigned long active_anon, inactive_anon;
+ unsigned long active_file, inactive_file;
+
+ inactive_anon = mem_cgroup_get_all_zonestat(mem_cont,
+ LRU_INACTIVE_ANON);
+ active_anon = mem_cgroup_get_all_zonestat(mem_cont,
+ LRU_ACTIVE_ANON);
+ inactive_file = mem_cgroup_get_all_zonestat(mem_cont,
+ LRU_INACTIVE_FILE);
+ active_file = mem_cgroup_get_all_zonestat(mem_cont,
+ LRU_ACTIVE_FILE);
+ cb->fill(cb, "active_anon", (active_anon) * PAGE_SIZE);
+ cb->fill(cb, "inactive_anon", (inactive_anon) * PAGE_SIZE);
+ cb->fill(cb, "active_file", (active_file) * PAGE_SIZE);
+ cb->fill(cb, "inactive_file", (inactive_file) * PAGE_SIZE);
}
return 0;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-19 12:52:41 +0000