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Message-Id: <1456235116-32385-12-git-send-email-mgorman@techsingularity.net>
Date: Tue, 23 Feb 2016 13:45:00 +0000
From: Mel Gorman <mgorman@...hsingularity.net>
To: Linux-MM <linux-mm@...ck.org>
Cc: Rik van Riel <riel@...riel.com>, Vlastimil Babka <vbabka@...e.cz>,
Johannes Weiner <hannes@...xchg.org>,
LKML <linux-kernel@...r.kernel.org>,
Mel Gorman <mgorman@...hsingularity.net>
Subject: [PATCH 11/27] mm, vmscan: Clear congestion, dirty and need for compaction on a per-node basis
Congested and dirty tracking of a node and whether reclaim should stall
is still based on zone activity. This patch considers whether the kernel
should stall based on node-based reclaim activity.
Signed-off-by: Mel Gorman <mgorman@...hsingularity.net>
---
mm/vmscan.c | 24 ++++++++++++------------
1 file changed, 12 insertions(+), 12 deletions(-)
diff --git a/mm/vmscan.c b/mm/vmscan.c
index fe004cb11b71..1f5d3829d35e 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2988,7 +2988,17 @@ static bool zone_balanced(struct zone *zone, int order,
{
unsigned long mark = high_wmark_pages(zone) + balance_gap;
- return zone_watermark_ok_safe(zone, order, mark, classzone_idx);
+ if (!zone_watermark_ok_safe(zone, order, mark, classzone_idx))
+ return false;
+
+ /*
+ * If any eligible zone is balanced then the node is not considered
+ * to be congested or dirty
+ */
+ clear_bit(PGDAT_CONGESTED, &zone->zone_pgdat->flags);
+ clear_bit(PGDAT_DIRTY, &zone->zone_pgdat->flags);
+
+ return true;
}
/*
@@ -3133,13 +3143,6 @@ static int balance_pgdat(pg_data_t *pgdat, int order, int classzone_idx)
if (!zone_balanced(zone, order, 0, 0)) {
classzone_idx = i;
break;
- } else {
- /*
- * If any eligible zone is balanced then the
- * node is not considered congested or dirty.
- */
- clear_bit(PGDAT_CONGESTED, &zone->zone_pgdat->flags);
- clear_bit(PGDAT_DIRTY, &zone->zone_pgdat->flags);
}
}
@@ -3199,11 +3202,8 @@ static int balance_pgdat(pg_data_t *pgdat, int order, int classzone_idx)
if (!populated_zone(zone))
continue;
- if (zone_balanced(zone, sc.order, 0, classzone_idx)) {
- clear_bit(PGDAT_CONGESTED, &pgdat->flags);
- clear_bit(PGDAT_DIRTY, &pgdat->flags);
+ if (zone_balanced(zone, sc.order, 0, classzone_idx))
goto out;
- }
}
/*
--
2.6.4
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