From: Christoph Lameter We can now access the number of pages in a mapped state in an inexpensive way in shrink_active_list. So drop the nr_mapped field from scan_control. Signed-off-by: Christoph Lameter Signed-off-by: Andrew Morton --- mm/vmscan.c | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-) diff -puN mm/vmscan.c~zoned-vm-counters-remove-nr_file_mapped-from-scan-control-structure mm/vmscan.c --- a/mm/vmscan.c~zoned-vm-counters-remove-nr_file_mapped-from-scan-control-structure +++ a/mm/vmscan.c @@ -47,8 +47,6 @@ struct scan_control { /* Incremented by the number of inactive pages that were scanned */ unsigned long nr_scanned; - unsigned long nr_mapped; /* From page_state */ - /* This context's GFP mask */ gfp_t gfp_mask; @@ -744,7 +742,8 @@ static void shrink_active_list(unsigned * how much memory * is mapped. */ - mapped_ratio = (sc->nr_mapped * 100) / vm_total_pages; + mapped_ratio = (global_page_state(NR_FILE_MAPPED) * 100) / + vm_total_pages; /* * Now decide how much we really want to unmap some pages. The @@ -990,7 +989,6 @@ unsigned long try_to_free_pages(struct z } for (priority = DEF_PRIORITY; priority >= 0; priority--) { - sc.nr_mapped = global_page_state(NR_FILE_MAPPED); sc.nr_scanned = 0; if (!priority) disable_swap_token(); @@ -1075,8 +1073,6 @@ loop_again: total_scanned = 0; nr_reclaimed = 0; sc.may_writepage = !laptop_mode; - sc.nr_mapped = global_page_state(NR_FILE_MAPPED); - inc_page_state(pageoutrun); for (i = 0; i < pgdat->nr_zones; i++) { @@ -1549,7 +1545,6 @@ static int __zone_reclaim(struct zone *z struct scan_control sc = { .may_writepage = !!(zone_reclaim_mode & RECLAIM_WRITE), .may_swap = !!(zone_reclaim_mode & RECLAIM_SWAP), - .nr_mapped = global_page_state(NR_FILE_MAPPED), .swap_cluster_max = max_t(unsigned long, nr_pages, SWAP_CLUSTER_MAX), .gfp_mask = gfp_mask, _