diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/vmscan.c | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c index 795a050fe471..b2baca7645d7 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -74,9 +74,6 @@ struct scan_control { int may_writepage; - /* Can pages be swapped as part of reclaim? */ - int may_swap; - /* This context's SWAP_CLUSTER_MAX. If freeing memory for * suspend, we effectively ignore SWAP_CLUSTER_MAX. * In this context, it doesn't matter that we scan the @@ -430,8 +427,6 @@ static int shrink_list(struct list_head *page_list, struct scan_control *sc) * Try to allocate it some swap space here. */ if (PageAnon(page) && !PageSwapCache(page)) { - if (!sc->may_swap) - goto keep_locked; if (!add_to_swap(page)) goto activate_locked; } @@ -952,7 +947,6 @@ int try_to_free_pages(struct zone **zones, gfp_t gfp_mask) sc.gfp_mask = gfp_mask; sc.may_writepage = 0; - sc.may_swap = 1; inc_page_state(allocstall); @@ -1055,7 +1049,6 @@ loop_again: total_reclaimed = 0; sc.gfp_mask = GFP_KERNEL; sc.may_writepage = 0; - sc.may_swap = 1; sc.nr_mapped = read_page_state(nr_mapped); inc_page_state(pageoutrun); @@ -1353,76 +1346,3 @@ static int __init kswapd_init(void) } module_init(kswapd_init) - - -/* - * Try to free up some pages from this zone through reclaim. - */ -int zone_reclaim(struct zone *zone, gfp_t gfp_mask, unsigned int order) -{ - struct scan_control sc; - int nr_pages = 1 << order; - int total_reclaimed = 0; - - /* The reclaim may sleep, so don't do it if sleep isn't allowed */ - if (!(gfp_mask & __GFP_WAIT)) - return 0; - if (zone->all_unreclaimable) - return 0; - - sc.gfp_mask = gfp_mask; - sc.may_writepage = 0; - sc.may_swap = 0; - sc.nr_mapped = read_page_state(nr_mapped); - sc.nr_scanned = 0; - sc.nr_reclaimed = 0; - /* scan at the highest priority */ - sc.priority = 0; - disable_swap_token(); - - if (nr_pages > SWAP_CLUSTER_MAX) - sc.swap_cluster_max = nr_pages; - else - sc.swap_cluster_max = SWAP_CLUSTER_MAX; - - /* Don't reclaim the zone if there are other reclaimers active */ - if (atomic_read(&zone->reclaim_in_progress) > 0) - goto out; - - shrink_zone(zone, &sc); - total_reclaimed = sc.nr_reclaimed; - - out: - return total_reclaimed; -} - -asmlinkage long sys_set_zone_reclaim(unsigned int node, unsigned int zone, - unsigned int state) -{ - struct zone *z; - int i; - - if (!capable(CAP_SYS_ADMIN)) - return -EACCES; - - if (node >= MAX_NUMNODES || !node_online(node)) - return -EINVAL; - - /* This will break if we ever add more zones */ - if (!(zone & (1<<ZONE_DMA|1<<ZONE_NORMAL|1<<ZONE_HIGHMEM))) - return -EINVAL; - - for (i = 0; i < MAX_NR_ZONES; i++) { - if (!(zone & 1<<i)) - continue; - - z = &NODE_DATA(node)->node_zones[i]; - - if (state) - z->reclaim_pages = 1; - else - z->reclaim_pages = 0; - } - - return 0; -} |