[PATCH 2/6] mm/vmscan: Update stale comments

Andrey Ryabinin
2018-03-15T16:45:49Z

Update some comments that become stale since transiton from per-zone
to per-node reclaim.

Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
---
mm/vmscan.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 4390a8d5be41..6d74b12099bd 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -926,7 +926,7 @@ static unsigned long shrink_page_list(struct list_head *page_list,
(PageSwapCache(page) && (sc->gfp_mask & __GFP_IO));

/*
- * The number of dirty pages determines if a zone is marked
+ * The number of dirty pages determines if a node is marked
* reclaim_congested which affects wait_iff_congested. kswapd
* will stall and start writing pages if the tail of the LRU
* is all dirty unqueued pages.
@@ -1764,7 +1764,7 @@ shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec,
* as there is no guarantee the dirtying process is throttled in the
* same way balance_dirty_pages() manages.
*
- * Once a zone is flagged ZONE_WRITEBACK, kswapd will count the number
+ * Once a node is flagged PGDAT_WRITEBACK, kswapd will count the number
* of pages under pages flagged for immediate reclaim and stall if any
* are encountered in the nr_immediate check below.
*/
@@ -1791,7 +1791,7 @@ shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec,
*/
if (sane_reclaim(sc)) {
/*
- * Tag a zone as congested if all the dirty pages scanned were
+ * Tag a node as congested if all the dirty pages scanned were
* backed by a congested BDI and wait_iff_congested will stall.
*/
if (stat.nr_dirty && stat.nr_dirty == stat.nr_congested)
@@ -1812,7 +1812,7 @@ shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec,
}

/*
- * Stall direct reclaim for IO completions if underlying BDIs or zone
+ * Stall direct reclaim for IO completions if underlying BDIs and node
* is congested. Allow kswapd to continue until it starts encountering
* unqueued dirty pages or cycling through the LRU too quickly.
*/
@@ -3808,7 +3808,7 @@ static int __node_reclaim(struct pglist_data *pgdat, gfp_t gfp_mask, unsigned in

if (node_pagecache_reclaimable(pgdat) > pgdat->min_unmapped_pages) {
/*
- * Free memory by calling shrink zone with increasing
+ * Free memory by calling shrink node with increasing
* priorities until we have enough memory freed.
*/
do {
--
2.16.1