/**
* lru_cache_add_active_or_unevictable
* @page: the page to be added to LRU
* @vma: vma in which page is mapped for determining reclaimability
*
* place @page on active or unevictable LRU list, depending on
* page_evictable(). Note that if the page is not evictable,
* it goes directly back onto it's zone's unevictable list. It does
* NOT use a per cpu pagevec.
*/
void lru_cache_add_active_or_unevictable(struct page *page,
struct vm_area_struct *vma)
{
if (page_evictable(page, vma))
lru_cache_add_lru(page, LRU_ACTIVE + page_is_file_cache(page));
else
add_page_to_unevictable_list(page);
}
/**
* lru_cache_add_active_or_unevictable
* @page: the page to be added to LRU
* @vma: vma in which page is mapped for determining reclaimability
*
* Place @page on the active or unevictable LRU list, depending on its
* evictability. Note that if the page is not evictable, it goes
* directly back onto it's zone's unevictable list, it does NOT use a
* per cpu pagevec.
*/
void lru_cache_add_active_or_unevictable(struct page *page,
struct vm_area_struct *vma)
{
VM_BUG_ON_PAGE(PageLRU(page), page);
if (likely((vma->vm_flags & (VM_LOCKED | VM_SPECIAL)) != VM_LOCKED)) {
SetPageActive(page);
lru_cache_add(page);
return;
}
if (!TestSetPageMlocked(page)) {
/*
* We use the irq-unsafe __mod_zone_page_stat because this
* counter is not modified from interrupt context, and the pte
* lock is held(spinlock), which implies preemption disabled.
*/
__mod_zone_page_state(page_zone(page), NR_MLOCK,
hpage_nr_pages(page));
count_vm_event(UNEVICTABLE_PGMLOCKED);
}
add_page_to_unevictable_list(page);
}
