netdev - [PATCH net-next 3/5] rhashtable: use future table size to make expansion decision

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Date:	Tue, 6 Jan 2015 15:23:21 +0800
From:	Ying Xue <ying.xue@...driver.com>
To:	<tgraf@...g.ch>
CC:	<davem@...emloft.net>, <netdev@...r.kernel.org>,
	<jon.maloy@...csson.com>, <Paul.Gortmaker@...driver.com>,
	<erik.hugne@...csson.com>, <tipc-discussion@...ts.sourceforge.net>
Subject: [PATCH net-next 3/5] rhashtable: use future table size to make expansion decision

Should use future table size instead of old table size to decide
whether hash table is worth being expanded.

Signed-off-by: Ying Xue <ying.xue@...driver.com>
Cc: Thomas Graf <tgraf@...g.ch>
---
 lib/rhashtable.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/rhashtable.c b/lib/rhashtable.c
index 6eda22f..f5288b1 100644
--- a/lib/rhashtable.c
+++ b/lib/rhashtable.c
@@ -478,13 +478,14 @@ EXPORT_SYMBOL_GPL(rhashtable_shrink);
 static void rht_deferred_worker(struct work_struct *work)
 {
 	struct rhashtable *ht;
-	struct bucket_table *tbl;
+	struct bucket_table *tbl, *new_tbl;
 
 	ht = container_of(work, struct rhashtable, run_work.work);
 	mutex_lock(&ht->mutex);
 	tbl = rht_dereference(ht->tbl, ht);
+	new_tbl = rht_dereference(ht->future_tbl, ht);
 
-	if (ht->p.grow_decision && ht->p.grow_decision(ht, tbl->size))
+	if (ht->p.grow_decision && ht->p.grow_decision(ht, new_tbl->size))
 		rhashtable_expand(ht);
 	else if (ht->p.shrink_decision && ht->p.shrink_decision(ht, tbl->size))
 		rhashtable_shrink(ht);
-- 
1.7.9.5

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