#include <asm/div64.h>
#include <linux/swapops.h>
-#include <linux/ckrm_mem.h>
/*
* From 0 .. 100. Higher means more swappy.
/* This context's GFP mask */
unsigned int gfp_mask;
- /* Flag used by CKRM */
- unsigned int ckrm_flags;
-
int may_writepage;
};
{
LIST_HEAD(page_list);
struct pagevec pvec;
- int max_scan = sc->nr_to_scan, nr_pass;
- unsigned int ckrm_flags = sc->ckrm_flags, bit_flag;
+ int max_scan = sc->nr_to_scan;
pagevec_init(&pvec, 1);
lru_add_drain();
spin_lock_irq(&zone->lru_lock);
-redo:
- ckrm_get_reclaim_bits(&ckrm_flags, &bit_flag);
- nr_pass = zone->nr_inactive;
while (max_scan > 0) {
struct page *page;
int nr_taken = 0;
int nr_scan = 0;
int nr_freed;
- while (nr_pass-- && nr_scan++ < SWAP_CLUSTER_MAX &&
+ while (nr_scan++ < SWAP_CLUSTER_MAX &&
!list_empty(&zone->inactive_list)) {
page = lru_to_page(&zone->inactive_list);
SetPageLRU(page);
list_add(&page->lru, &zone->inactive_list);
continue;
- } else if (bit_flag && !ckrm_kick_page(page, bit_flag)) {
- __put_page(page);
- SetPageLRU(page);
-#ifdef CONFIG_CKRM_MEM_LRUORDER_CHANGE
- list_add_tail(&page->lru, &zone->inactive_list);
-#else
- list_add(&page->lru, &zone->inactive_list);
-#endif
- continue;
}
list_add(&page->lru, &page_list);
- ckrm_mem_dec_inactive(page);
nr_taken++;
}
zone->nr_inactive -= nr_taken;
zone->pages_scanned += nr_taken;
spin_unlock_irq(&zone->lru_lock);
- if ((bit_flag == 0) && (nr_taken == 0))
+ if (nr_taken == 0)
goto done;
max_scan -= nr_scan;
spin_lock_irq(&zone->lru_lock);
}
}
- if (ckrm_flags && (nr_pass <= 0)) {
- goto redo;
- }
}
spin_unlock_irq(&zone->lru_lock);
done:
long mapped_ratio;
long distress;
long swap_tendency;
- unsigned int ckrm_flags = sc->ckrm_flags, bit_flag;
- int nr_pass;
lru_add_drain();
pgmoved = 0;
spin_lock_irq(&zone->lru_lock);
-redo:
- ckrm_get_reclaim_bits(&ckrm_flags, &bit_flag);
- nr_pass = zone->nr_active;
while (pgscanned < nr_pages && !list_empty(&zone->active_list)) {
page = lru_to_page(&zone->active_list);
prefetchw_prev_lru_page(page, &zone->active_list, flags);
__put_page(page);
SetPageLRU(page);
list_add(&page->lru, &zone->active_list);
- pgscanned++;
- } else if (bit_flag && !ckrm_kick_page(page, bit_flag)) {
- __put_page(page);
- SetPageLRU(page);
-#ifdef CONFIG_CKRM_MEM_LRUORDER_CHANGE
- list_add_tail(&page->lru, &zone->active_list);
-#else
- list_add(&page->lru, &zone->active_list);
-#endif
} else {
list_add(&page->lru, &l_hold);
- ckrm_mem_dec_active(page);
pgmoved++;
- pgscanned++;
- }
- if (ckrm_flags && !--nr_pass) {
- goto redo;
}
+ pgscanned++;
}
zone->nr_active -= pgmoved;
spin_unlock_irq(&zone->lru_lock);
if (!TestClearPageActive(page))
BUG();
list_move(&page->lru, &zone->inactive_list);
- ckrm_mem_inc_inactive(page);
pgmoved++;
if (!pagevec_add(&pvec, page)) {
zone->nr_inactive += pgmoved;
BUG();
BUG_ON(!PageActive(page));
list_move(&page->lru, &zone->active_list);
- ckrm_mem_inc_active(page);
pgmoved++;
if (!pagevec_add(&pvec, page)) {
zone->nr_active += pgmoved;
scan_active = (unsigned long)tmp;
}
- sc->ckrm_flags = ckrm_setup_reclamation();
atomic_add(scan_active + 1, &zone->nr_scan_active);
count = atomic_read(&zone->nr_scan_active);
if (count >= SWAP_CLUSTER_MAX) {
sc->nr_to_scan = count;
shrink_cache(zone, sc);
}
- ckrm_teardown_reclamation();
}
-#ifdef CONFIG_CKRM_RES_MEM
-// This function needs to be given more thought.
-static void
-ckrm_shrink_class(ckrm_mem_res_t *cls)
-{
- struct scan_control sc;
- struct zone *zone;
- int zindex = 0, active_credit = 0, inactive_credit = 0;
-
- if (ckrm_test_set_shrink(cls)) { // set the SHRINK bit atomically
- // if it is already set somebody is working on it. so... leave
- return;
- }
- sc.nr_mapped = read_page_state(nr_mapped);
- sc.nr_scanned = 0;
- sc.ckrm_flags = ckrm_get_reclaim_flags(cls);
- sc.nr_reclaimed = 0;
- sc.priority = 0; // always very high priority
-
- for_each_zone(zone) {
- int zone_total, zone_limit, active_limit, inactive_limit;
- int active_over, inactive_over, count;
- u64 temp;
-
- zone->temp_priority = zone->prev_priority;
- zone->prev_priority = sc.priority;
-
- zone_total = zone->nr_active + zone->nr_inactive + zone->free_pages;
-
- temp = (u64) cls->pg_limit * zone_total;
- do_div(temp, ckrm_tot_lru_pages);
- zone_limit = (int) temp;
- active_limit = (6 * zone_limit) / 10; // 2/3rd in active list
- inactive_limit = (3 * zone_limit) / 10; // 1/3rd in inactive list
-
- active_over = cls->nr_active[zindex] - active_limit + active_credit;
- inactive_over = active_over +
- (cls->nr_inactive[zindex] - inactive_limit) + inactive_credit;
-
- if (active_over > 0) {
- atomic_add(active_over + 1, &zone->nr_scan_active);
- count = atomic_read(&zone->nr_scan_active);
- if (count >= SWAP_CLUSTER_MAX) {
- atomic_set(&zone->nr_scan_active, 0);
- sc.nr_to_scan = count;
- refill_inactive_zone(zone, &sc);
- }
- active_credit = 0;
- } else {
- active_credit = active_over;
- }
-
- if (inactive_over > 0) {
- atomic_add(inactive_over, &zone->nr_scan_inactive);
- count = atomic_read(&zone->nr_scan_inactive);
- if (count >= SWAP_CLUSTER_MAX) {
- atomic_set(&zone->nr_scan_inactive, 0);
- sc.nr_to_scan = count;
- shrink_cache(zone, &sc);
- }
- inactive_credit = 0;
- } else {
- inactive_credit = inactive_over;
- }
- zone->prev_priority = zone->temp_priority;
- zindex++;
- }
- ckrm_clear_shrink(cls);
-}
-
-static void
-ckrm_shrink_classes(void)
-{
- ckrm_mem_res_t *cls;
-
- spin_lock(&ckrm_mem_lock);
- while (!ckrm_shrink_list_empty()) {
- cls = list_entry(ckrm_shrink_list.next, ckrm_mem_res_t,
- shrink_list);
- spin_unlock(&ckrm_mem_lock);
- ckrm_shrink_class(cls);
- spin_lock(&ckrm_mem_lock);
- list_del(&cls->shrink_list);
- cls->flags &= ~MEM_NEAR_LIMIT;
- }
- spin_unlock(&ckrm_mem_lock);
-}
-
-#else
-#define ckrm_shrink_classes() do { } while(0)
-#endif
-
/*
* 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
schedule();
finish_wait(&pgdat->kswapd_wait, &wait);
- if (!ckrm_shrink_list_empty())
- ckrm_shrink_classes();
- else
balance_pgdat(pgdat, 0);
}
}
*/
void wakeup_kswapd(struct zone *zone)
{
- if ((zone->free_pages > zone->pages_low) && ckrm_shrink_list_empty())
+ if (zone->free_pages > zone->pages_low)
return;
if (!waitqueue_active(&zone->zone_pgdat->kswapd_wait))
return;
git://git.onelab.eu / linux-2.6.git / blobdiff