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

Michal Hocko
2018-03-20T15:00:54Z

On Thu 15-03-18 19:45:49, Andrey Ryabinin wrote:
> Update some comments that become stale since transiton from per-zone
> to per-node reclaim.
>
> Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>

Acked-by: Michal Hocko <mhocko@suse.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

--
Michal Hocko
SUSE Labs