From c822f6223d03c2c5b026a21da09c6b6d523258cd Mon Sep 17 00:00:00 2001 From: Johannes Weiner Date: Wed, 3 May 2017 14:52:10 -0700 Subject: mm: delete NR_PAGES_SCANNED and pgdat_reclaimable() NR_PAGES_SCANNED counts number of pages scanned since the last page free event in the allocator. This was used primarily to measure the reclaimability of zones and nodes, and determine when reclaim should give up on them. In that role, it has been replaced in the preceding patches by a different mechanism. Being implemented as an efficient vmstat counter, it was automatically exported to userspace as well. It's however unlikely that anyone outside the kernel is using this counter in any meaningful way. Remove the counter and the unused pgdat_reclaimable(). Link: http://lkml.kernel.org/r/20170228214007.5621-8-hannes@cmpxchg.org Signed-off-by: Johannes Weiner Acked-by: Hillf Danton Acked-by: Michal Hocko Cc: Jia He Cc: Mel Gorman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/vmscan.c | 9 --------- 1 file changed, 9 deletions(-) (limited to 'mm/vmscan.c') diff --git a/mm/vmscan.c b/mm/vmscan.c index 9117ae8d49ee..02f2eb51b33e 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -230,12 +230,6 @@ unsigned long pgdat_reclaimable_pages(struct pglist_data *pgdat) return nr; } -bool pgdat_reclaimable(struct pglist_data *pgdat) -{ - return node_page_state_snapshot(pgdat, NR_PAGES_SCANNED) < - pgdat_reclaimable_pages(pgdat) * 6; -} - /** * lruvec_lru_size - Returns the number of pages on the given LRU list. * @lruvec: lru vector @@ -1750,7 +1744,6 @@ shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec, reclaim_stat->recent_scanned[file] += nr_taken; if (global_reclaim(sc)) { - __mod_node_page_state(pgdat, NR_PAGES_SCANNED, nr_scanned); if (current_is_kswapd()) __count_vm_events(PGSCAN_KSWAPD, nr_scanned); else @@ -1953,8 +1946,6 @@ static void shrink_active_list(unsigned long nr_to_scan, __mod_node_page_state(pgdat, NR_ISOLATED_ANON + file, nr_taken); reclaim_stat->recent_scanned[file] += nr_taken; - if (global_reclaim(sc)) - __mod_node_page_state(pgdat, NR_PAGES_SCANNED, nr_scanned); __count_vm_events(PGREFILL, nr_scanned); spin_unlock_irq(&pgdat->lru_lock); -- cgit v1.2.3-59-g8ed1b