The patch titled
Subject: mm, vmscan: avoid passing in classzone_idx unnecessarily to shrink_node
has been added to the -mm tree. Its filename is
mm-vmscan-avoid-passing-in-classzone_idx-unnecessarily-to-shrink_node.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-vmscan-avoid-passing-in-classzone_idx-unnecessarily-to-shrink_node.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-vmscan-avoid-passing-in-classzone_idx-unnecessarily-to-shrink_node.patch
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------------------------------------------------------
From: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
Subject: mm, vmscan: avoid passing in classzone_idx unnecessarily to shrink_node
shrink_node receives all information it needs about classzone_idx
from sc->reclaim_idx so remove the aliases.
Link: http://lkml.kernel.org/r/1467970510-21195-25-git-send-email-mgorman@xxxxxxxxxxxxxxxxxxx
Signed-off-by: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
Acked-by: Hillf Danton <hillf.zj@xxxxxxxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmscan.c | 20 +++++++++-----------
1 file changed, 9 insertions(+), 11 deletions(-)
diff -puN mm/vmscan.c~mm-vmscan-avoid-passing-in-classzone_idx-unnecessarily-to-shrink_node mm/vmscan.c
--- a/mm/vmscan.c~mm-vmscan-avoid-passing-in-classzone_idx-unnecessarily-to-shrink_node
+++ a/mm/vmscan.c
@@ -2426,8 +2426,7 @@ static inline bool should_continue_recla
return true;
}
-static bool shrink_node(pg_data_t *pgdat, struct scan_control *sc,
- enum zone_type classzone_idx)
+static bool shrink_node(pg_data_t *pgdat, struct scan_control *sc)
{
struct reclaim_state *reclaim_state = current->reclaim_state;
unsigned long nr_reclaimed, nr_scanned;
@@ -2656,7 +2655,7 @@ static void shrink_zones(struct zonelist
if (zone->zone_pgdat == last_pgdat)
continue;
last_pgdat = zone->zone_pgdat;
- shrink_node(zone->zone_pgdat, sc, classzone_idx);
+ shrink_node(zone->zone_pgdat, sc);
}
/*
@@ -3080,7 +3079,6 @@ static bool prepare_kswapd_sleep(pg_data
* This is used to determine if the scanning priority needs to be raised.
*/
static bool kswapd_shrink_node(pg_data_t *pgdat,
- int classzone_idx,
struct scan_control *sc)
{
struct zone *zone;
@@ -3088,7 +3086,7 @@ static bool kswapd_shrink_node(pg_data_t
/* Reclaim a number of pages proportional to the number of zones */
sc->nr_to_reclaim = 0;
- for (z = 0; z <= classzone_idx; z++) {
+ for (z = 0; z <= sc->reclaim_idx; z++) {
zone = pgdat->node_zones + z;
if (!populated_zone(zone))
continue;
@@ -3100,7 +3098,7 @@ static bool kswapd_shrink_node(pg_data_t
* Historically care was taken to put equal pressure on all zones but
* now pressure is applied based on node LRU order.
*/
- shrink_node(pgdat, sc, classzone_idx);
+ shrink_node(pgdat, sc);
/*
* Fragmentation may mean that the system cannot be rebalanced for
@@ -3162,7 +3160,7 @@ static int balance_pgdat(pg_data_t *pgda
if (!populated_zone(zone))
continue;
- classzone_idx = i;
+ sc.reclaim_idx = i;
break;
}
}
@@ -3175,12 +3173,12 @@ static int balance_pgdat(pg_data_t *pgda
* zone was balanced even under extreme pressure when the
* overall node may be congested.
*/
- for (i = classzone_idx; i >= 0; i--) {
+ for (i = sc.reclaim_idx; i >= 0; i--) {
zone = pgdat->node_zones + i;
if (!populated_zone(zone))
continue;
- if (zone_balanced(zone, sc.order, classzone_idx))
+ if (zone_balanced(zone, sc.order, sc.reclaim_idx))
goto out;
}
@@ -3211,7 +3209,7 @@ static int balance_pgdat(pg_data_t *pgda
* enough pages are already being scanned that that high
* watermark would be met at 100% efficiency.
*/
- if (kswapd_shrink_node(pgdat, classzone_idx, &sc))
+ if (kswapd_shrink_node(pgdat, &sc))
raise_priority = false;
/*
@@ -3674,7 +3672,7 @@ static int __node_reclaim(struct pglist_
* priorities until we have enough memory freed.
*/
do {
- shrink_node(pgdat, &sc, classzone_idx);
+ shrink_node(pgdat, &sc);
} while (sc.nr_reclaimed < nr_pages && --sc.priority >= 0);
}
_
Patches currently in -mm which might be from mgorman@xxxxxxxxxxxxxxxxxxx are
mm-meminit-always-return-a-valid-node-from-early_pfn_to_nid.patch
mm-meminit-ensure-node-is-online-before-checking-whether-pages-are-uninitialised.patch
mm-meminit-remove-early_page_nid_uninitialised.patch
mm-vmstat-add-infrastructure-for-per-node-vmstats.patch
mm-vmscan-move-lru_lock-to-the-node.patch
mm-vmscan-move-lru-lists-to-node.patch
mm-mmzone-clarify-the-usage-of-zone-padding.patch
mm-vmscan-begin-reclaiming-pages-on-a-per-node-basis.patch
mm-vmscan-have-kswapd-only-scan-based-on-the-highest-requested-zone.patch
mm-vmscan-make-kswapd-reclaim-in-terms-of-nodes.patch
mm-vmscan-remove-balance-gap.patch
mm-vmscan-simplify-the-logic-deciding-whether-kswapd-sleeps.patch
mm-vmscan-by-default-have-direct-reclaim-only-shrink-once-per-node.patch
mm-vmscan-remove-duplicate-logic-clearing-node-congestion-and-dirty-state.patch
mm-vmscan-do-not-reclaim-from-kswapd-if-there-is-any-eligible-zone.patch
mm-vmscan-make-shrink_node-decisions-more-node-centric.patch
mm-memcg-move-memcg-limit-enforcement-from-zones-to-nodes.patch
mm-workingset-make-working-set-detection-node-aware.patch
mm-page_alloc-consider-dirtyable-memory-in-terms-of-nodes.patch
mm-move-page-mapped-accounting-to-the-node.patch
mm-rename-nr_anon_pages-to-nr_anon_mapped.patch
mm-move-most-file-based-accounting-to-the-node.patch
mm-move-vmscan-writes-and-file-write-accounting-to-the-node.patch
mm-vmscan-only-wakeup-kswapd-once-per-node-for-the-requested-classzone.patch
mm-page_alloc-wake-kswapd-based-on-the-highest-eligible-zone.patch
mm-convert-zone_reclaim-to-node_reclaim.patch
mm-vmscan-avoid-passing-in-classzone_idx-unnecessarily-to-shrink_node.patch
mm-vmscan-avoid-passing-in-classzone_idx-unnecessarily-to-compaction_ready.patch
mm-vmscan-avoid-passing-in-remaining-unnecessarily-to-prepare_kswapd_sleep.patch
mm-vmscan-have-kswapd-reclaim-from-all-zones-if-reclaiming-and-buffer_heads_over_limit.patch
mm-vmscan-add-classzone-information-to-tracepoints.patch
mm-page_alloc-remove-fair-zone-allocation-policy.patch
mm-page_alloc-cache-the-last-node-whose-dirty-limit-is-reached.patch
mm-vmstat-replace-__count_zone_vm_events-with-a-zone-id-equivalent.patch
mm-vmstat-account-per-zone-stalls-and-pages-skipped-during-reclaim.patch
mm-vmstat-print-node-based-stats-in-zoneinfo-file.patch
mm-vmstat-remove-zone-and-node-double-accounting-by-approximating-retries.patch
--
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