Messages in this thread Patch in this message | | | Date | Sat, 29 Dec 2007 21:35:07 +0900 | From | "minchan kim" <> | Subject | [PATCH] remove calculation for reclaiming anonymose page if system have no swap device |
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If system have no swap device, scan_control's may_swap field have to be set to zero. This patch will remove redundant calc_reclaim_mapped call which called in shrink_active_list by sc->may_swap.
This patch is made from 2.6.24-rc6-mm1.
Signed-off-by: minchan kim <minchan.kim@gmail.com> --- mm/vmscan.c | 16 ++++++++++++++++ 1 files changed, 16 insertions(+), 0 deletions(-)
diff --git a/mm/vmscan.c b/mm/vmscan.c index 45cee1c..7284d79 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1427,7 +1427,11 @@ unsigned long try_to_free_pages(struct zone **zones, int order, gfp_t gfp_mask) .gfp_mask = gfp_mask, .may_writepage = !laptop_mode, .swap_cluster_max = SWAP_CLUSTER_MAX, +#ifdef CONFIG_SWAP .may_swap = 1, +#else + .may_swap = 0, +#endif .swappiness = vm_swappiness, .order = order, .mem_cgroup = NULL, @@ -1445,7 +1449,11 @@ unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem_cont, struct scan_control sc = { .gfp_mask = gfp_mask, .may_writepage = !laptop_mode, +#ifdef CONFIG_SWAP .may_swap = 1, +#else + .may_swap = 0, +#endif .swap_cluster_max = SWAP_CLUSTER_MAX, .swappiness = vm_swappiness, .order = 0, @@ -1493,7 +1501,11 @@ static unsigned long balance_pgdat(pg_data_t *pgdat, int order) struct reclaim_state *reclaim_state = current->reclaim_state; struct scan_control sc = { .gfp_mask = GFP_KERNEL, +#ifdef CONFIG_SWAP .may_swap = 1, +#else + .may_swap = 0, +#endif .swap_cluster_max = SWAP_CLUSTER_MAX, .swappiness = vm_swappiness, .order = order, @@ -2003,7 +2015,11 @@ static int __zone_reclaim(struct zone *zone, gfp_t gfp_mask, unsigned int order) unsigned long nr_reclaimed = 0; struct scan_control sc = { .may_writepage = !!(zone_reclaim_mode & RECLAIM_WRITE), +#ifdef CONFIG_SWAP .may_swap = !!(zone_reclaim_mode & RECLAIM_SWAP), +#else + .may_swap = 0, +#endif .swap_cluster_max = max_t(unsigned long, nr_pages, SWAP_CLUSTER_MAX), .gfp_mask = gfp_mask, -- 1.5.2.5
-- Kinds regards, minchan kim
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