From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Wed, 21 Sep 2011 14:33:28 +0000 (-0400)
Subject: rculfhash: min size only needed on shrink, take nr cpus into account
X-Git-Tag: v0.7.0~43^2~129
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=c941bb9efd0c5b865988d46605e82c9b08c544d8;p=userspace-rcu.git

rculfhash: min size only needed on shrink, take nr cpus into account

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/rculfhash.c b/rculfhash.c
index 0c2b3ab..359de13 100644
--- a/rculfhash.c
+++ b/rculfhash.c
@@ -566,12 +566,6 @@ void ht_count_add(struct cds_lfht *ht, unsigned long size)
 			if ((count >> CHAIN_LEN_RESIZE_THRESHOLD) < size)
 				return;
 			dbg_printf("add set global %ld\n", count);
-			/*
-			 * Don't resize table if the number of nodes is below a
-			 * certain threshold.
-			 */
-			if (count < (1UL << COUNT_COMMIT_ORDER))
-				return;
 			cds_lfht_resize_lazy_count(ht, size,
 				count >> (CHAIN_LEN_TARGET - 1));
 		}
@@ -602,10 +596,10 @@ void ht_count_del(struct cds_lfht *ht, unsigned long size)
 				return;
 			dbg_printf("del set global %ld\n", count);
 			/*
-			 * Don't resize table if the number of nodes is below a
+			 * Don't shrink table if the number of nodes is below a
 			 * certain threshold.
 			 */
-			if (count < (1UL << COUNT_COMMIT_ORDER))
+			if (count < (1UL << COUNT_COMMIT_ORDER) * (nr_cpus_mask + 1))
 				return;
 			cds_lfht_resize_lazy_count(ht, size,
 				count >> (CHAIN_LEN_TARGET - 1));