mm: vmscan: distinguish between memcg triggering reclaim and memcg being scanned
Memory cgroup hierarchies are currently handled completely outside of the traditional reclaim code, which is invoked with a single memory cgroup as an argument for the whole call stack. Subsequent patches will switch this code to do hierarchical reclaim, so there needs to be a distinction between a) the memory cgroup that is triggering reclaim due to hitting its limit and b) the memory cgroup that is being scanned as a child of a). This patch introduces a struct mem_cgroup_zone that contains the combination of the memory cgroup and the zone being scanned, which is then passed down the stack instead of the zone argument. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Johannes Weiner <jweiner@redhat.com> Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Reviewed-by: Michal Hocko <mhocko@suse.cz> Reviewed-by: Kirill A. Shutemov <kirill@shutemov.name> Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Cc: Balbir Singh <bsingharora@gmail.com> Cc: Ying Han <yinghan@google.com> Cc: Greg Thelen <gthelen@google.com> Cc: Michel Lespinasse <walken@google.com> Cc: Rik van Riel <riel@redhat.com> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Hugh Dickins <hughd@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Johannes Weiner
Linus Torvalds
parent
89b5fae536
commit
f16015fbf2
249
mm/vmscan.c
249
mm/vmscan.c
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@ -103,8 +103,11 @@ struct scan_control {
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*/
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reclaim_mode_t reclaim_mode;
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/* Which cgroup do we reclaim from */
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struct mem_cgroup *mem_cgroup;
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/*
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* The memory cgroup that hit its limit and as a result is the
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* primary target of this reclaim invocation.
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*/
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struct mem_cgroup *target_mem_cgroup;
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/*
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* Nodemask of nodes allowed by the caller. If NULL, all nodes
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@ -113,6 +116,11 @@ struct scan_control {
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nodemask_t *nodemask;
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};
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struct mem_cgroup_zone {
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struct mem_cgroup *mem_cgroup;
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struct zone *zone;
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};
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#define lru_to_page(_head) (list_entry((_head)->prev, struct page, lru))
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#ifdef ARCH_HAS_PREFETCH
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@ -155,12 +163,12 @@ static DECLARE_RWSEM(shrinker_rwsem);
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#ifdef CONFIG_CGROUP_MEM_RES_CTLR
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static bool global_reclaim(struct scan_control *sc)
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{
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return !sc->mem_cgroup;
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return !sc->target_mem_cgroup;
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}
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static bool scanning_global_lru(struct scan_control *sc)
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static bool scanning_global_lru(struct mem_cgroup_zone *mz)
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{
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return !sc->mem_cgroup;
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return !mz->mem_cgroup;
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}
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#else
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static bool global_reclaim(struct scan_control *sc)
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@ -168,29 +176,30 @@ static bool global_reclaim(struct scan_control *sc)
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return true;
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}
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static bool scanning_global_lru(struct scan_control *sc)
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static bool scanning_global_lru(struct mem_cgroup_zone *mz)
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{
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return true;
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}
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#endif
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static struct zone_reclaim_stat *get_reclaim_stat(struct zone *zone,
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struct scan_control *sc)
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static struct zone_reclaim_stat *get_reclaim_stat(struct mem_cgroup_zone *mz)
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{
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if (!scanning_global_lru(sc))
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return mem_cgroup_get_reclaim_stat(sc->mem_cgroup, zone);
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if (!scanning_global_lru(mz))
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return mem_cgroup_get_reclaim_stat(mz->mem_cgroup, mz->zone);
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return &zone->reclaim_stat;
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return &mz->zone->reclaim_stat;
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}
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static unsigned long zone_nr_lru_pages(struct zone *zone,
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struct scan_control *sc, enum lru_list lru)
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static unsigned long zone_nr_lru_pages(struct mem_cgroup_zone *mz,
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enum lru_list lru)
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{
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if (!scanning_global_lru(sc))
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return mem_cgroup_zone_nr_lru_pages(sc->mem_cgroup,
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zone_to_nid(zone), zone_idx(zone), BIT(lru));
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if (!scanning_global_lru(mz))
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return mem_cgroup_zone_nr_lru_pages(mz->mem_cgroup,
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zone_to_nid(mz->zone),
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zone_idx(mz->zone),
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BIT(lru));
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return zone_page_state(zone, NR_LRU_BASE + lru);
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return zone_page_state(mz->zone, NR_LRU_BASE + lru);
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}
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@ -693,12 +702,13 @@ enum page_references {
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};
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static enum page_references page_check_references(struct page *page,
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struct mem_cgroup_zone *mz,
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struct scan_control *sc)
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{
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int referenced_ptes, referenced_page;
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unsigned long vm_flags;
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referenced_ptes = page_referenced(page, 1, sc->mem_cgroup, &vm_flags);
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referenced_ptes = page_referenced(page, 1, mz->mem_cgroup, &vm_flags);
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referenced_page = TestClearPageReferenced(page);
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/* Lumpy reclaim - ignore references */
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@ -754,7 +764,7 @@ static enum page_references page_check_references(struct page *page,
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* shrink_page_list() returns the number of reclaimed pages
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*/
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static unsigned long shrink_page_list(struct list_head *page_list,
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struct zone *zone,
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struct mem_cgroup_zone *mz,
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struct scan_control *sc,
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int priority,
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unsigned long *ret_nr_dirty,
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@ -785,7 +795,7 @@ static unsigned long shrink_page_list(struct list_head *page_list,
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goto keep;
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VM_BUG_ON(PageActive(page));
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VM_BUG_ON(page_zone(page) != zone);
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VM_BUG_ON(page_zone(page) != mz->zone);
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sc->nr_scanned++;
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@ -819,7 +829,7 @@ static unsigned long shrink_page_list(struct list_head *page_list,
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}
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}
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references = page_check_references(page, sc);
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references = page_check_references(page, mz, sc);
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switch (references) {
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case PAGEREF_ACTIVATE:
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goto activate_locked;
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@ -1011,7 +1021,7 @@ keep_lumpy:
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* will encounter the same problem
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*/
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if (nr_dirty && nr_dirty == nr_congested && global_reclaim(sc))
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zone_set_flag(zone, ZONE_CONGESTED);
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zone_set_flag(mz->zone, ZONE_CONGESTED);
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free_hot_cold_page_list(&free_pages, 1);
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@ -1347,13 +1357,14 @@ static int too_many_isolated(struct zone *zone, int file,
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* TODO: Try merging with migrations version of putback_lru_pages
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*/
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static noinline_for_stack void
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putback_lru_pages(struct zone *zone, struct scan_control *sc,
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unsigned long nr_anon, unsigned long nr_file,
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struct list_head *page_list)
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putback_lru_pages(struct mem_cgroup_zone *mz, struct scan_control *sc,
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unsigned long nr_anon, unsigned long nr_file,
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struct list_head *page_list)
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{
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struct page *page;
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struct pagevec pvec;
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struct zone_reclaim_stat *reclaim_stat = get_reclaim_stat(zone, sc);
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struct zone *zone = mz->zone;
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struct zone_reclaim_stat *reclaim_stat = get_reclaim_stat(mz);
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pagevec_init(&pvec, 1);
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@ -1393,15 +1404,17 @@ putback_lru_pages(struct zone *zone, struct scan_control *sc,
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pagevec_release(&pvec);
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}
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static noinline_for_stack void update_isolated_counts(struct zone *zone,
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struct scan_control *sc,
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unsigned long *nr_anon,
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unsigned long *nr_file,
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struct list_head *isolated_list)
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static noinline_for_stack void
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update_isolated_counts(struct mem_cgroup_zone *mz,
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struct scan_control *sc,
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unsigned long *nr_anon,
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unsigned long *nr_file,
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struct list_head *isolated_list)
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{
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unsigned long nr_active;
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struct zone *zone = mz->zone;
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unsigned int count[NR_LRU_LISTS] = { 0, };
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struct zone_reclaim_stat *reclaim_stat = get_reclaim_stat(zone, sc);
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struct zone_reclaim_stat *reclaim_stat = get_reclaim_stat(mz);
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nr_active = clear_active_flags(isolated_list, count);
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__count_vm_events(PGDEACTIVATE, nr_active);
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@ -1470,8 +1483,8 @@ static inline bool should_reclaim_stall(unsigned long nr_taken,
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* of reclaimed pages
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*/
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static noinline_for_stack unsigned long
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shrink_inactive_list(unsigned long nr_to_scan, struct zone *zone,
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struct scan_control *sc, int priority, int file)
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shrink_inactive_list(unsigned long nr_to_scan, struct mem_cgroup_zone *mz,
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struct scan_control *sc, int priority, int file)
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{
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LIST_HEAD(page_list);
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unsigned long nr_scanned;
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@ -1482,6 +1495,7 @@ shrink_inactive_list(unsigned long nr_to_scan, struct zone *zone,
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unsigned long nr_dirty = 0;
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unsigned long nr_writeback = 0;
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isolate_mode_t reclaim_mode = ISOLATE_INACTIVE;
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struct zone *zone = mz->zone;
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while (unlikely(too_many_isolated(zone, file, sc))) {
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congestion_wait(BLK_RW_ASYNC, HZ/10);
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@ -1504,13 +1518,13 @@ shrink_inactive_list(unsigned long nr_to_scan, struct zone *zone,
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spin_lock_irq(&zone->lru_lock);
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if (scanning_global_lru(sc)) {
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if (scanning_global_lru(mz)) {
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nr_taken = isolate_pages_global(nr_to_scan, &page_list,
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&nr_scanned, sc->order, reclaim_mode, zone, 0, file);
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} else {
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nr_taken = mem_cgroup_isolate_pages(nr_to_scan, &page_list,
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&nr_scanned, sc->order, reclaim_mode, zone,
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sc->mem_cgroup, 0, file);
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mz->mem_cgroup, 0, file);
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}
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if (global_reclaim(sc)) {
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zone->pages_scanned += nr_scanned;
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@ -1527,17 +1541,17 @@ shrink_inactive_list(unsigned long nr_to_scan, struct zone *zone,
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return 0;
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}
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update_isolated_counts(zone, sc, &nr_anon, &nr_file, &page_list);
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update_isolated_counts(mz, sc, &nr_anon, &nr_file, &page_list);
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spin_unlock_irq(&zone->lru_lock);
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nr_reclaimed = shrink_page_list(&page_list, zone, sc, priority,
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nr_reclaimed = shrink_page_list(&page_list, mz, sc, priority,
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&nr_dirty, &nr_writeback);
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/* Check if we should syncronously wait for writeback */
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if (should_reclaim_stall(nr_taken, nr_reclaimed, priority, sc)) {
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set_reclaim_mode(priority, sc, true);
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nr_reclaimed += shrink_page_list(&page_list, zone, sc,
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nr_reclaimed += shrink_page_list(&page_list, mz, sc,
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priority, &nr_dirty, &nr_writeback);
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}
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@ -1546,7 +1560,7 @@ shrink_inactive_list(unsigned long nr_to_scan, struct zone *zone,
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__count_vm_events(KSWAPD_STEAL, nr_reclaimed);
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__count_zone_vm_events(PGSTEAL, zone, nr_reclaimed);
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putback_lru_pages(zone, sc, nr_anon, nr_file, &page_list);
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putback_lru_pages(mz, sc, nr_anon, nr_file, &page_list);
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/*
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* If reclaim is isolating dirty pages under writeback, it implies
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@ -1633,8 +1647,10 @@ static void move_active_pages_to_lru(struct zone *zone,
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__count_vm_events(PGDEACTIVATE, pgmoved);
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}
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static void shrink_active_list(unsigned long nr_pages, struct zone *zone,
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struct scan_control *sc, int priority, int file)
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static void shrink_active_list(unsigned long nr_pages,
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struct mem_cgroup_zone *mz,
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struct scan_control *sc,
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int priority, int file)
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{
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unsigned long nr_taken;
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unsigned long pgscanned;
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@ -1643,9 +1659,10 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone,
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LIST_HEAD(l_active);
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LIST_HEAD(l_inactive);
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struct page *page;
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struct zone_reclaim_stat *reclaim_stat = get_reclaim_stat(zone, sc);
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struct zone_reclaim_stat *reclaim_stat = get_reclaim_stat(mz);
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unsigned long nr_rotated = 0;
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isolate_mode_t reclaim_mode = ISOLATE_ACTIVE;
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struct zone *zone = mz->zone;
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lru_add_drain();
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@ -1655,7 +1672,7 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone,
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reclaim_mode |= ISOLATE_CLEAN;
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spin_lock_irq(&zone->lru_lock);
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if (scanning_global_lru(sc)) {
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if (scanning_global_lru(mz)) {
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nr_taken = isolate_pages_global(nr_pages, &l_hold,
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&pgscanned, sc->order,
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reclaim_mode, zone,
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@ -1664,7 +1681,7 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone,
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nr_taken = mem_cgroup_isolate_pages(nr_pages, &l_hold,
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&pgscanned, sc->order,
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reclaim_mode, zone,
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sc->mem_cgroup, 1, file);
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mz->mem_cgroup, 1, file);
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}
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if (global_reclaim(sc))
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@ -1690,7 +1707,7 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone,
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continue;
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}
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if (page_referenced(page, 0, sc->mem_cgroup, &vm_flags)) {
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if (page_referenced(page, 0, mz->mem_cgroup, &vm_flags)) {
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nr_rotated += hpage_nr_pages(page);
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/*
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* Identify referenced, file-backed active pages and
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@ -1753,10 +1770,8 @@ static int inactive_anon_is_low_global(struct zone *zone)
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* Returns true if the zone does not have enough inactive anon pages,
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* meaning some active anon pages need to be deactivated.
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*/
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static int inactive_anon_is_low(struct zone *zone, struct scan_control *sc)
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static int inactive_anon_is_low(struct mem_cgroup_zone *mz)
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{
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int low;
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/*
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* If we don't have swap space, anonymous page deactivation
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* is pointless.
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@ -1764,15 +1779,14 @@ static int inactive_anon_is_low(struct zone *zone, struct scan_control *sc)
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if (!total_swap_pages)
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return 0;
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if (scanning_global_lru(sc))
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low = inactive_anon_is_low_global(zone);
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else
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low = mem_cgroup_inactive_anon_is_low(sc->mem_cgroup, zone);
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return low;
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if (!scanning_global_lru(mz))
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return mem_cgroup_inactive_anon_is_low(mz->mem_cgroup,
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mz->zone);
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return inactive_anon_is_low_global(mz->zone);
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}
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#else
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static inline int inactive_anon_is_low(struct zone *zone,
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struct scan_control *sc)
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static inline int inactive_anon_is_low(struct mem_cgroup_zone *mz)
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{
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return 0;
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}
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@ -1790,8 +1804,7 @@ static int inactive_file_is_low_global(struct zone *zone)
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/**
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* inactive_file_is_low - check if file pages need to be deactivated
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* @zone: zone to check
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* @sc: scan control of this context
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* @mz: memory cgroup and zone to check
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*
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* When the system is doing streaming IO, memory pressure here
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* ensures that active file pages get deactivated, until more
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@ -1803,45 +1816,44 @@ static int inactive_file_is_low_global(struct zone *zone)
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* This uses a different ratio than the anonymous pages, because
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* the page cache uses a use-once replacement algorithm.
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*/
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static int inactive_file_is_low(struct zone *zone, struct scan_control *sc)
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static int inactive_file_is_low(struct mem_cgroup_zone *mz)
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{
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int low;
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if (!scanning_global_lru(mz))
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return mem_cgroup_inactive_file_is_low(mz->mem_cgroup,
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mz->zone);
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if (scanning_global_lru(sc))
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low = inactive_file_is_low_global(zone);
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else
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low = mem_cgroup_inactive_file_is_low(sc->mem_cgroup, zone);
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return low;
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return inactive_file_is_low_global(mz->zone);
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}
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static int inactive_list_is_low(struct zone *zone, struct scan_control *sc,
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int file)
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static int inactive_list_is_low(struct mem_cgroup_zone *mz, int file)
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{
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if (file)
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return inactive_file_is_low(zone, sc);
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return inactive_file_is_low(mz);
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else
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return inactive_anon_is_low(zone, sc);
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return inactive_anon_is_low(mz);
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}
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static unsigned long shrink_list(enum lru_list lru, unsigned long nr_to_scan,
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struct zone *zone, struct scan_control *sc, int priority)
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struct mem_cgroup_zone *mz,
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struct scan_control *sc, int priority)
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{
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int file = is_file_lru(lru);
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if (is_active_lru(lru)) {
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if (inactive_list_is_low(zone, sc, file))
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shrink_active_list(nr_to_scan, zone, sc, priority, file);
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if (inactive_list_is_low(mz, file))
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shrink_active_list(nr_to_scan, mz, sc, priority, file);
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return 0;
|
||||
}
|
||||
|
||||
return shrink_inactive_list(nr_to_scan, zone, sc, priority, file);
|
||||
return shrink_inactive_list(nr_to_scan, mz, sc, priority, file);
|
||||
}
|
||||
|
||||
static int vmscan_swappiness(struct scan_control *sc)
|
||||
static int vmscan_swappiness(struct mem_cgroup_zone *mz,
|
||||
struct scan_control *sc)
|
||||
{
|
||||
if (global_reclaim(sc))
|
||||
return vm_swappiness;
|
||||
return mem_cgroup_swappiness(sc->mem_cgroup);
|
||||
return mem_cgroup_swappiness(mz->mem_cgroup);
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -1852,13 +1864,13 @@ static int vmscan_swappiness(struct scan_control *sc)
|
|||
*
|
||||
* nr[0] = anon pages to scan; nr[1] = file pages to scan
|
||||
*/
|
||||
static void get_scan_count(struct zone *zone, struct scan_control *sc,
|
||||
unsigned long *nr, int priority)
|
||||
static void get_scan_count(struct mem_cgroup_zone *mz, struct scan_control *sc,
|
||||
unsigned long *nr, int priority)
|
||||
{
|
||||
unsigned long anon, file, free;
|
||||
unsigned long anon_prio, file_prio;
|
||||
unsigned long ap, fp;
|
||||
struct zone_reclaim_stat *reclaim_stat = get_reclaim_stat(zone, sc);
|
||||
struct zone_reclaim_stat *reclaim_stat = get_reclaim_stat(mz);
|
||||
u64 fraction[2], denominator;
|
||||
enum lru_list l;
|
||||
int noswap = 0;
|
||||
|
|
@ -1888,16 +1900,16 @@ static void get_scan_count(struct zone *zone, struct scan_control *sc,
|
|||
goto out;
|
||||
}
|
||||
|
||||
anon = zone_nr_lru_pages(zone, sc, LRU_ACTIVE_ANON) +
|
||||
zone_nr_lru_pages(zone, sc, LRU_INACTIVE_ANON);
|
||||
file = zone_nr_lru_pages(zone, sc, LRU_ACTIVE_FILE) +
|
||||
zone_nr_lru_pages(zone, sc, LRU_INACTIVE_FILE);
|
||||
anon = zone_nr_lru_pages(mz, LRU_ACTIVE_ANON) +
|
||||
zone_nr_lru_pages(mz, LRU_INACTIVE_ANON);
|
||||
file = zone_nr_lru_pages(mz, LRU_ACTIVE_FILE) +
|
||||
zone_nr_lru_pages(mz, LRU_INACTIVE_FILE);
|
||||
|
||||
if (global_reclaim(sc)) {
|
||||
free = zone_page_state(zone, NR_FREE_PAGES);
|
||||
free = zone_page_state(mz->zone, NR_FREE_PAGES);
|
||||
/* If we have very few page cache pages,
|
||||
force-scan anon pages. */
|
||||
if (unlikely(file + free <= high_wmark_pages(zone))) {
|
||||
if (unlikely(file + free <= high_wmark_pages(mz->zone))) {
|
||||
fraction[0] = 1;
|
||||
fraction[1] = 0;
|
||||
denominator = 1;
|
||||
|
|
@ -1909,8 +1921,8 @@ static void get_scan_count(struct zone *zone, struct scan_control *sc,
|
|||
* With swappiness at 100, anonymous and file have the same priority.
|
||||
* This scanning priority is essentially the inverse of IO cost.
|
||||
*/
|
||||
anon_prio = vmscan_swappiness(sc);
|
||||
file_prio = 200 - vmscan_swappiness(sc);
|
||||
anon_prio = vmscan_swappiness(mz, sc);
|
||||
file_prio = 200 - vmscan_swappiness(mz, sc);
|
||||
|
||||
/*
|
||||
* OK, so we have swap space and a fair amount of page cache
|
||||
|
|
@ -1923,7 +1935,7 @@ static void get_scan_count(struct zone *zone, struct scan_control *sc,
|
|||
*
|
||||
* anon in [0], file in [1]
|
||||
*/
|
||||
spin_lock_irq(&zone->lru_lock);
|
||||
spin_lock_irq(&mz->zone->lru_lock);
|
||||
if (unlikely(reclaim_stat->recent_scanned[0] > anon / 4)) {
|
||||
reclaim_stat->recent_scanned[0] /= 2;
|
||||
reclaim_stat->recent_rotated[0] /= 2;
|
||||
|
|
@ -1944,7 +1956,7 @@ static void get_scan_count(struct zone *zone, struct scan_control *sc,
|
|||
|
||||
fp = (file_prio + 1) * (reclaim_stat->recent_scanned[1] + 1);
|
||||
fp /= reclaim_stat->recent_rotated[1] + 1;
|
||||
spin_unlock_irq(&zone->lru_lock);
|
||||
spin_unlock_irq(&mz->zone->lru_lock);
|
||||
|
||||
fraction[0] = ap;
|
||||
fraction[1] = fp;
|
||||
|
|
@ -1954,7 +1966,7 @@ out:
|
|||
int file = is_file_lru(l);
|
||||
unsigned long scan;
|
||||
|
||||
scan = zone_nr_lru_pages(zone, sc, l);
|
||||
scan = zone_nr_lru_pages(mz, l);
|
||||
if (priority || noswap) {
|
||||
scan >>= priority;
|
||||
if (!scan && force_scan)
|
||||
|
|
@ -1972,7 +1984,7 @@ out:
|
|||
* back to the allocator and call try_to_compact_zone(), we ensure that
|
||||
* there are enough free pages for it to be likely successful
|
||||
*/
|
||||
static inline bool should_continue_reclaim(struct zone *zone,
|
||||
static inline bool should_continue_reclaim(struct mem_cgroup_zone *mz,
|
||||
unsigned long nr_reclaimed,
|
||||
unsigned long nr_scanned,
|
||||
struct scan_control *sc)
|
||||
|
|
@ -2012,15 +2024,15 @@ static inline bool should_continue_reclaim(struct zone *zone,
|
|||
* inactive lists are large enough, continue reclaiming
|
||||
*/
|
||||
pages_for_compaction = (2UL << sc->order);
|
||||
inactive_lru_pages = zone_nr_lru_pages(zone, sc, LRU_INACTIVE_FILE);
|
||||
inactive_lru_pages = zone_nr_lru_pages(mz, LRU_INACTIVE_FILE);
|
||||
if (nr_swap_pages > 0)
|
||||
inactive_lru_pages += zone_nr_lru_pages(zone, sc, LRU_INACTIVE_ANON);
|
||||
inactive_lru_pages += zone_nr_lru_pages(mz, LRU_INACTIVE_ANON);
|
||||
if (sc->nr_reclaimed < pages_for_compaction &&
|
||||
inactive_lru_pages > pages_for_compaction)
|
||||
return true;
|
||||
|
||||
/* If compaction would go ahead or the allocation would succeed, stop */
|
||||
switch (compaction_suitable(zone, sc->order)) {
|
||||
switch (compaction_suitable(mz->zone, sc->order)) {
|
||||
case COMPACT_PARTIAL:
|
||||
case COMPACT_CONTINUE:
|
||||
return false;
|
||||
|
|
@ -2032,8 +2044,8 @@ static inline bool should_continue_reclaim(struct zone *zone,
|
|||
/*
|
||||
* This is a basic per-zone page freer. Used by both kswapd and direct reclaim.
|
||||
*/
|
||||
static void shrink_zone(int priority, struct zone *zone,
|
||||
struct scan_control *sc)
|
||||
static void shrink_mem_cgroup_zone(int priority, struct mem_cgroup_zone *mz,
|
||||
struct scan_control *sc)
|
||||
{
|
||||
unsigned long nr[NR_LRU_LISTS];
|
||||
unsigned long nr_to_scan;
|
||||
|
|
@ -2045,7 +2057,7 @@ static void shrink_zone(int priority, struct zone *zone,
|
|||
restart:
|
||||
nr_reclaimed = 0;
|
||||
nr_scanned = sc->nr_scanned;
|
||||
get_scan_count(zone, sc, nr, priority);
|
||||
get_scan_count(mz, sc, nr, priority);
|
||||
|
||||
blk_start_plug(&plug);
|
||||
while (nr[LRU_INACTIVE_ANON] || nr[LRU_ACTIVE_FILE] ||
|
||||
|
|
@ -2057,7 +2069,7 @@ restart:
|
|||
nr[l] -= nr_to_scan;
|
||||
|
||||
nr_reclaimed += shrink_list(l, nr_to_scan,
|
||||
zone, sc, priority);
|
||||
mz, sc, priority);
|
||||
}
|
||||
}
|
||||
/*
|
||||
|
|
@ -2078,17 +2090,28 @@ restart:
|
|||
* Even if we did not try to evict anon pages at all, we want to
|
||||
* rebalance the anon lru active/inactive ratio.
|
||||
*/
|
||||
if (inactive_anon_is_low(zone, sc))
|
||||
shrink_active_list(SWAP_CLUSTER_MAX, zone, sc, priority, 0);
|
||||
if (inactive_anon_is_low(mz))
|
||||
shrink_active_list(SWAP_CLUSTER_MAX, mz, sc, priority, 0);
|
||||
|
||||
/* reclaim/compaction might need reclaim to continue */
|
||||
if (should_continue_reclaim(zone, nr_reclaimed,
|
||||
if (should_continue_reclaim(mz, nr_reclaimed,
|
||||
sc->nr_scanned - nr_scanned, sc))
|
||||
goto restart;
|
||||
|
||||
throttle_vm_writeout(sc->gfp_mask);
|
||||
}
|
||||
|
||||
static void shrink_zone(int priority, struct zone *zone,
|
||||
struct scan_control *sc)
|
||||
{
|
||||
struct mem_cgroup_zone mz = {
|
||||
.mem_cgroup = sc->target_mem_cgroup,
|
||||
.zone = zone,
|
||||
};
|
||||
|
||||
shrink_mem_cgroup_zone(priority, &mz, sc);
|
||||
}
|
||||
|
||||
/*
|
||||
* This is the direct reclaim path, for page-allocating processes. We only
|
||||
* try to reclaim pages from zones which will satisfy the caller's allocation
|
||||
|
|
@ -2230,7 +2253,7 @@ static unsigned long do_try_to_free_pages(struct zonelist *zonelist,
|
|||
for (priority = DEF_PRIORITY; priority >= 0; priority--) {
|
||||
sc->nr_scanned = 0;
|
||||
if (!priority)
|
||||
disable_swap_token(sc->mem_cgroup);
|
||||
disable_swap_token(sc->target_mem_cgroup);
|
||||
if (shrink_zones(priority, zonelist, sc))
|
||||
break;
|
||||
|
||||
|
|
@ -2317,7 +2340,7 @@ unsigned long try_to_free_pages(struct zonelist *zonelist, int order,
|
|||
.may_unmap = 1,
|
||||
.may_swap = 1,
|
||||
.order = order,
|
||||
.mem_cgroup = NULL,
|
||||
.target_mem_cgroup = NULL,
|
||||
.nodemask = nodemask,
|
||||
};
|
||||
struct shrink_control shrink = {
|
||||
|
|
@ -2349,7 +2372,7 @@ unsigned long mem_cgroup_shrink_node_zone(struct mem_cgroup *mem,
|
|||
.may_unmap = 1,
|
||||
.may_swap = !noswap,
|
||||
.order = 0,
|
||||
.mem_cgroup = mem,
|
||||
.target_mem_cgroup = mem,
|
||||
};
|
||||
|
||||
sc.gfp_mask = (gfp_mask & GFP_RECLAIM_MASK) |
|
||||
|
|
@ -2387,7 +2410,7 @@ unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem_cont,
|
|||
.may_swap = !noswap,
|
||||
.nr_to_reclaim = SWAP_CLUSTER_MAX,
|
||||
.order = 0,
|
||||
.mem_cgroup = mem_cont,
|
||||
.target_mem_cgroup = mem_cont,
|
||||
.nodemask = NULL, /* we don't care the placement */
|
||||
.gfp_mask = (gfp_mask & GFP_RECLAIM_MASK) |
|
||||
(GFP_HIGHUSER_MOVABLE & ~GFP_RECLAIM_MASK),
|
||||
|
|
@ -2417,6 +2440,18 @@ unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem_cont,
|
|||
}
|
||||
#endif
|
||||
|
||||
static void age_active_anon(struct zone *zone, struct scan_control *sc,
|
||||
int priority)
|
||||
{
|
||||
struct mem_cgroup_zone mz = {
|
||||
.mem_cgroup = NULL,
|
||||
.zone = zone,
|
||||
};
|
||||
|
||||
if (inactive_anon_is_low(&mz))
|
||||
shrink_active_list(SWAP_CLUSTER_MAX, &mz, sc, priority, 0);
|
||||
}
|
||||
|
||||
/*
|
||||
* pgdat_balanced is used when checking if a node is balanced for high-order
|
||||
* allocations. Only zones that meet watermarks and are in a zone allowed
|
||||
|
|
@ -2537,7 +2572,7 @@ static unsigned long balance_pgdat(pg_data_t *pgdat, int order,
|
|||
*/
|
||||
.nr_to_reclaim = ULONG_MAX,
|
||||
.order = order,
|
||||
.mem_cgroup = NULL,
|
||||
.target_mem_cgroup = NULL,
|
||||
};
|
||||
struct shrink_control shrink = {
|
||||
.gfp_mask = sc.gfp_mask,
|
||||
|
|
@ -2576,9 +2611,7 @@ loop_again:
|
|||
* Do some background aging of the anon list, to give
|
||||
* pages a chance to be referenced before reclaiming.
|
||||
*/
|
||||
if (inactive_anon_is_low(zone, &sc))
|
||||
shrink_active_list(SWAP_CLUSTER_MAX, zone,
|
||||
&sc, priority, 0);
|
||||
age_active_anon(zone, &sc, priority);
|
||||
|
||||
if (!zone_watermark_ok_safe(zone, order,
|
||||
high_wmark_pages(zone), 0, 0)) {
|
||||
|
|
|
|||
Reference in New Issue