diff options
Diffstat (limited to 'mm/vmscan.c')
| -rw-r--r-- | mm/vmscan.c | 46 |
1 files changed, 7 insertions, 39 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c index 3b5860294bb6..62e7f62fb559 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -623,6 +623,8 @@ static unsigned long shrink_page_list(struct list_head *page_list, * Try to allocate it some swap space here. */ if (PageAnon(page) && !PageSwapCache(page)) { + if (!(sc->gfp_mask & __GFP_IO)) + goto keep_locked; switch (try_to_munlock(page)) { case SWAP_FAIL: /* shouldn't happen */ case SWAP_AGAIN: @@ -634,6 +636,7 @@ static unsigned long shrink_page_list(struct list_head *page_list, } if (!add_to_swap(page, GFP_ATOMIC)) goto activate_locked; + may_enter_fs = 1; } #endif /* CONFIG_SWAP */ @@ -1245,6 +1248,7 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone, list_add(&page->lru, &l_inactive); } + spin_lock_irq(&zone->lru_lock); /* * Count referenced pages from currently used mappings as * rotated, even though they are moved to the inactive list. @@ -1260,7 +1264,6 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone, pgmoved = 0; lru = LRU_BASE + file * LRU_FILE; - spin_lock_irq(&zone->lru_lock); while (!list_empty(&l_inactive)) { page = lru_to_page(&l_inactive); prefetchw_prev_lru_page(page, &l_inactive, flags); @@ -1386,9 +1389,9 @@ static void get_scan_ratio(struct zone *zone, struct scan_control *sc, file_prio = 200 - sc->swappiness; /* - * anon recent_rotated[0] - * %anon = 100 * ----------- / ----------------- * IO cost - * anon + file rotate_sum + * The amount of pressure on anon vs file pages is inversely + * proportional to the fraction of recently scanned pages on + * each list that were recently referenced and in active use. */ ap = (anon_prio + 1) * (zone->recent_scanned[0] + 1); ap /= zone->recent_rotated[0] + 1; @@ -2368,39 +2371,6 @@ int page_evictable(struct page *page, struct vm_area_struct *vma) return 1; } -static void show_page_path(struct page *page) -{ - char buf[256]; - if (page_is_file_cache(page)) { - struct address_space *mapping = page->mapping; - struct dentry *dentry; - pgoff_t pgoff = page->index << (PAGE_CACHE_SHIFT - PAGE_SHIFT); - - spin_lock(&mapping->i_mmap_lock); - dentry = d_find_alias(mapping->host); - printk(KERN_INFO "rescued: %s %lu\n", - dentry_path(dentry, buf, 256), pgoff); - spin_unlock(&mapping->i_mmap_lock); - } else { -#if defined(CONFIG_MM_OWNER) && defined(CONFIG_MMU) - struct anon_vma *anon_vma; - struct vm_area_struct *vma; - - anon_vma = page_lock_anon_vma(page); - if (!anon_vma) - return; - - list_for_each_entry(vma, &anon_vma->head, anon_vma_node) { - printk(KERN_INFO "rescued: anon %s\n", - vma->vm_mm->owner->comm); - break; - } - page_unlock_anon_vma(anon_vma); -#endif - } -} - - /** * check_move_unevictable_page - check page for evictability and move to appropriate zone lru list * @page: page to check evictability and move to appropriate lru list @@ -2421,8 +2391,6 @@ retry: if (page_evictable(page, NULL)) { enum lru_list l = LRU_INACTIVE_ANON + page_is_file_cache(page); - show_page_path(page); - __dec_zone_state(zone, NR_UNEVICTABLE); list_move(&page->lru, &zone->lru[l].list); __inc_zone_state(zone, NR_INACTIVE_ANON + l); |