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| author |  Wei Yang <richard.weiyang@gmail.com>
| 2022-04-28 23:16:04 -0700 |
|---|---|---|
| committer |  akpm <akpm@linux-foundation.org>
| 2022-04-28 23:16:04 -0700 |
| commit | 8b3a899abe15e68b8b82ff96c2f4e8c9a37874a0 (patch) | |
| tree | e0d7c17f699accbf7562c173fd5c64cad1d110aa /mm/vmscan.c | |
| parent | mm/vmscan: make sure wakeup_kswapd with managed zone (diff) | |
| download | linux-8b3a899abe15e68b8b82ff96c2f4e8c9a37874a0.tar.gz linux-8b3a899abe15e68b8b82ff96c2f4e8c9a37874a0.tar.bz2 linux-8b3a899abe15e68b8b82ff96c2f4e8c9a37874a0.zip | |
mm/vmscan: sc->reclaim_idx must be a valid zone index
lruvec_lru_size() is only used in get_scan_count(), so the only possible
zone_idx is sc->reclaim_idx. Since sc->reclaim_idx is ensured to be a
valid zone idex, we can remove the extra check for zone iteration.
Link: https://lkml.kernel.org/r/20220317234624.23358-1-richard.weiyang@gmail.com
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/vmscan.c')
| -rw-r--r-- | mm/vmscan.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c index cd9f222a3e78..f6570f334a05 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -587,7 +587,7 @@ unsigned long zone_reclaimable_pages(struct zone *zone) * lruvec_lru_size - Returns the number of pages on the given LRU list. * @lruvec: lru vector * @lru: lru to use - * @zone_idx: zones to consider (use MAX_NR_ZONES for the whole LRU list) + * @zone_idx: zones to consider (use MAX_NR_ZONES - 1 for the whole LRU list) */ static unsigned long lruvec_lru_size(struct lruvec *lruvec, enum lru_list lru, int zone_idx) @@ -595,7 +595,7 @@ static unsigned long lruvec_lru_size(struct lruvec *lruvec, enum lru_list lru, unsigned long size = 0; int zid; - for (zid = 0; zid <= zone_idx && zid < MAX_NR_ZONES; zid++) { + for (zid = 0; zid <= zone_idx; zid++) { struct zone *zone = &lruvec_pgdat(lruvec)->node_zones[zid]; if (!managed_zone(zone)) |