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per-zone and reclaim enhancements for memory controller: per-zone-lock for cgroup
Now, lru is per-zone. Then, lru_lock can be (should be) per-zone, too. This patch implementes per-zone lru lock. lru_lock is placed into mem_cgroup_per_zone struct. lock can be accessed by mz = mem_cgroup_zoneinfo(mem_cgroup, node, zone); &mz->lru_lock or mz = page_cgroup_zoneinfo(page_cgroup); &mz->lru_lock Signed-off-by: KAMEZAWA hiroyuki <kmaezawa.hiroyu@jp.fujitsu.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Balbir Singh <balbir@linux.vnet.ibm.com> Cc: David Rientjes <rientjes@google.com> Cc: Herbert Poetzl <herbert@13thfloor.at> Cc: Kirill Korotaev <dev@sw.ru> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Paul Menage <menage@google.com> Cc: Pavel Emelianov <xemul@openvz.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> Cc: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
KAMEZAWA Hiroyuki
Linus Torvalds
parent
1ecaab2bd2
commit
072c56c13e
@ -89,6 +89,10 @@ enum mem_cgroup_zstat_index {
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};
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struct mem_cgroup_per_zone {
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/*
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* spin_lock to protect the per cgroup LRU
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*/
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spinlock_t lru_lock;
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struct list_head active_list;
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struct list_head inactive_list;
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unsigned long count[NR_MEM_CGROUP_ZSTAT];
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@ -126,10 +130,7 @@ struct mem_cgroup {
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* per zone LRU lists.
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*/
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struct mem_cgroup_lru_info info;
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/*
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* spin_lock to protect the per cgroup LRU
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*/
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spinlock_t lru_lock;
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unsigned long control_type; /* control RSS or RSS+Pagecache */
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int prev_priority; /* for recording reclaim priority */
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/*
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@ -409,15 +410,16 @@ int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem)
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*/
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void mem_cgroup_move_lists(struct page_cgroup *pc, bool active)
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{
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struct mem_cgroup *mem;
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struct mem_cgroup_per_zone *mz;
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unsigned long flags;
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if (!pc)
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return;
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mem = pc->mem_cgroup;
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spin_lock(&mem->lru_lock);
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mz = page_cgroup_zoneinfo(pc);
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spin_lock_irqsave(&mz->lru_lock, flags);
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__mem_cgroup_move_lists(pc, active);
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spin_unlock(&mem->lru_lock);
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spin_unlock_irqrestore(&mz->lru_lock, flags);
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}
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/*
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@ -527,7 +529,7 @@ unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
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src = &mz->inactive_list;
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spin_lock(&mem_cont->lru_lock);
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spin_lock(&mz->lru_lock);
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scan = 0;
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list_for_each_entry_safe_reverse(pc, tmp, src, lru) {
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if (scan >= nr_to_scan)
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@ -557,7 +559,7 @@ unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
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}
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list_splice(&pc_list, src);
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spin_unlock(&mem_cont->lru_lock);
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spin_unlock(&mz->lru_lock);
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*scanned = scan;
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return nr_taken;
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@ -576,6 +578,7 @@ static int mem_cgroup_charge_common(struct page *page, struct mm_struct *mm,
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struct page_cgroup *pc;
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unsigned long flags;
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unsigned long nr_retries = MEM_CGROUP_RECLAIM_RETRIES;
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struct mem_cgroup_per_zone *mz;
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/*
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* Should page_cgroup's go to their own slab?
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@ -677,10 +680,11 @@ retry:
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goto retry;
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}
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spin_lock_irqsave(&mem->lru_lock, flags);
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mz = page_cgroup_zoneinfo(pc);
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spin_lock_irqsave(&mz->lru_lock, flags);
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/* Update statistics vector */
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__mem_cgroup_add_list(pc);
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spin_unlock_irqrestore(&mem->lru_lock, flags);
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spin_unlock_irqrestore(&mz->lru_lock, flags);
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done:
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return 0;
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@ -727,6 +731,7 @@ int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
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void mem_cgroup_uncharge(struct page_cgroup *pc)
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{
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struct mem_cgroup *mem;
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struct mem_cgroup_per_zone *mz;
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struct page *page;
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unsigned long flags;
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@ -739,6 +744,7 @@ void mem_cgroup_uncharge(struct page_cgroup *pc)
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if (atomic_dec_and_test(&pc->ref_cnt)) {
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page = pc->page;
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mz = page_cgroup_zoneinfo(pc);
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/*
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* get page->cgroup and clear it under lock.
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* force_empty can drop page->cgroup without checking refcnt.
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@ -747,9 +753,9 @@ void mem_cgroup_uncharge(struct page_cgroup *pc)
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mem = pc->mem_cgroup;
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css_put(&mem->css);
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res_counter_uncharge(&mem->res, PAGE_SIZE);
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spin_lock_irqsave(&mem->lru_lock, flags);
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spin_lock_irqsave(&mz->lru_lock, flags);
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__mem_cgroup_remove_list(pc);
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spin_unlock_irqrestore(&mem->lru_lock, flags);
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spin_unlock_irqrestore(&mz->lru_lock, flags);
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kfree(pc);
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}
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}
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@ -788,24 +794,29 @@ void mem_cgroup_page_migration(struct page *page, struct page *newpage)
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struct page_cgroup *pc;
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struct mem_cgroup *mem;
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unsigned long flags;
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struct mem_cgroup_per_zone *mz;
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retry:
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pc = page_get_page_cgroup(page);
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if (!pc)
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return;
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mem = pc->mem_cgroup;
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mz = page_cgroup_zoneinfo(pc);
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if (clear_page_cgroup(page, pc) != pc)
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goto retry;
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spin_lock_irqsave(&mem->lru_lock, flags);
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spin_lock_irqsave(&mz->lru_lock, flags);
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__mem_cgroup_remove_list(pc);
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spin_unlock_irqrestore(&mz->lru_lock, flags);
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pc->page = newpage;
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lock_page_cgroup(newpage);
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page_assign_page_cgroup(newpage, pc);
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unlock_page_cgroup(newpage);
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__mem_cgroup_add_list(pc);
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spin_unlock_irqrestore(&mem->lru_lock, flags);
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mz = page_cgroup_zoneinfo(pc);
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spin_lock_irqsave(&mz->lru_lock, flags);
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__mem_cgroup_add_list(pc);
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spin_unlock_irqrestore(&mz->lru_lock, flags);
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return;
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}
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@ -816,18 +827,26 @@ retry:
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*/
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#define FORCE_UNCHARGE_BATCH (128)
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static void
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mem_cgroup_force_empty_list(struct mem_cgroup *mem, struct list_head *list)
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mem_cgroup_force_empty_list(struct mem_cgroup *mem,
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struct mem_cgroup_per_zone *mz,
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int active)
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{
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struct page_cgroup *pc;
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struct page *page;
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int count;
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unsigned long flags;
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struct list_head *list;
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if (active)
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list = &mz->active_list;
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else
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list = &mz->inactive_list;
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if (list_empty(list))
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return;
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retry:
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count = FORCE_UNCHARGE_BATCH;
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spin_lock_irqsave(&mem->lru_lock, flags);
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spin_lock_irqsave(&mz->lru_lock, flags);
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while (--count && !list_empty(list)) {
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pc = list_entry(list->prev, struct page_cgroup, lru);
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@ -842,7 +861,7 @@ retry:
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} else /* being uncharged ? ...do relax */
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break;
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}
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spin_unlock_irqrestore(&mem->lru_lock, flags);
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spin_unlock_irqrestore(&mz->lru_lock, flags);
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if (!list_empty(list)) {
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cond_resched();
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goto retry;
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@ -873,11 +892,9 @@ int mem_cgroup_force_empty(struct mem_cgroup *mem)
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struct mem_cgroup_per_zone *mz;
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mz = mem_cgroup_zoneinfo(mem, node, zid);
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/* drop all page_cgroup in active_list */
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mem_cgroup_force_empty_list(mem,
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&mz->active_list);
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mem_cgroup_force_empty_list(mem, mz, 1);
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/* drop all page_cgroup in inactive_list */
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mem_cgroup_force_empty_list(mem,
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&mz->inactive_list);
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mem_cgroup_force_empty_list(mem, mz, 0);
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}
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}
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ret = 0;
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@ -1114,6 +1131,7 @@ static int alloc_mem_cgroup_per_zone_info(struct mem_cgroup *mem, int node)
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mz = &pn->zoneinfo[zone];
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INIT_LIST_HEAD(&mz->active_list);
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INIT_LIST_HEAD(&mz->inactive_list);
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spin_lock_init(&mz->lru_lock);
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}
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return 0;
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}
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@ -1143,7 +1161,6 @@ mem_cgroup_create(struct cgroup_subsys *ss, struct cgroup *cont)
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res_counter_init(&mem->res);
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spin_lock_init(&mem->lru_lock);
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mem->control_type = MEM_CGROUP_TYPE_ALL;
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memset(&mem->info, 0, sizeof(mem->info));
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