From: xiangxia.m.yue@gmail.com
To: gvrose8192@gmail.com, pshelar@ovn.org
Cc: netdev@vger.kernel.org, Tonghao Zhang <xiangxia.m.yue@gmail.com>
Subject: [PATCH net-next 3/9] net: openvswitch: shrink the mask array if necessary
Date: Mon, 30 Sep 2019 01:10:00 +0800 [thread overview]
Message-ID: <1569777006-7435-4-git-send-email-xiangxia.m.yue@gmail.com> (raw)
In-Reply-To: <1569777006-7435-1-git-send-email-xiangxia.m.yue@gmail.com>
From: Tonghao Zhang <xiangxia.m.yue@gmail.com>
When creating and inserting flow-mask, if there is no available
flow-mask, we realloc the mask array. When removing flow-mask,
if necessary, we shrink mask array.
Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
---
net/openvswitch/flow_table.c | 33 +++++++++++++++++++++++----------
1 file changed, 23 insertions(+), 10 deletions(-)
diff --git a/net/openvswitch/flow_table.c b/net/openvswitch/flow_table.c
index 99954fa..9c72aab 100644
--- a/net/openvswitch/flow_table.c
+++ b/net/openvswitch/flow_table.c
@@ -701,6 +701,23 @@ static struct table_instance *table_instance_expand(struct table_instance *ti,
return table_instance_rehash(ti, ti->n_buckets * 2, ufid);
}
+static void tbl_mask_array_delete_mask(struct mask_array *ma,
+ struct sw_flow_mask *mask)
+{
+ int i;
+
+ /* Remove the deleted mask pointers from the array */
+ for (i = 0; i < ma->max; i++) {
+ if (mask == ovsl_dereference(ma->masks[i])) {
+ RCU_INIT_POINTER(ma->masks[i], NULL);
+ ma->count--;
+ kfree_rcu(mask, rcu);
+ return;
+ }
+ }
+ BUG();
+}
+
/* Remove 'mask' from the mask list, if it is not needed any more. */
static void flow_mask_remove(struct flow_table *tbl, struct sw_flow_mask *mask)
{
@@ -714,18 +731,14 @@ static void flow_mask_remove(struct flow_table *tbl, struct sw_flow_mask *mask)
if (!mask->ref_count) {
struct mask_array *ma;
- int i;
ma = ovsl_dereference(tbl->mask_array);
- for (i = 0; i < ma->max; i++) {
- if (mask == ovsl_dereference(ma->masks[i])) {
- RCU_INIT_POINTER(ma->masks[i], NULL);
- ma->count--;
- kfree_rcu(mask, rcu);
- return;
- }
- }
- BUG();
+ tbl_mask_array_delete_mask(ma, mask);
+
+ /* Shrink the mask array if necessary. */
+ if (ma->max >= (MASK_ARRAY_SIZE_MIN * 2) &&
+ ma->count <= (ma->max / 3))
+ tbl_mask_array_realloc(tbl, ma->max / 2);
}
}
}
--
1.8.3.1
next prev parent reply other threads:[~2019-09-30 2:09 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-29 17:09 [PATCH net-next 0/9] optimize openvswitch flow looking up xiangxia.m.yue
2019-09-29 17:09 ` [PATCH net-next 1/9] net: openvswitch: add flow-mask cache for performance xiangxia.m.yue
2019-09-29 17:09 ` [PATCH net-next 2/9] net: openvswitch: convert mask list in mask array xiangxia.m.yue
2019-10-02 2:06 ` Pravin Shelar
2019-10-08 1:44 ` Tonghao Zhang
2019-09-29 17:10 ` xiangxia.m.yue [this message]
2019-09-29 17:10 ` [PATCH net-next 4/9] net: openvswitch: optimize flow mask cache hash collision xiangxia.m.yue
2019-09-29 17:10 ` [PATCH net-next 5/9] net: openvswitch: optimize flow-mask looking up xiangxia.m.yue
2019-10-02 2:06 ` Pravin Shelar
2019-10-08 3:15 ` Tonghao Zhang
2019-09-29 17:10 ` [PATCH net-next 6/9] net: openvswitch: simplify the flow_hash xiangxia.m.yue
2019-09-29 17:10 ` [PATCH net-next 7/9] net: openvswitch: add likely in flow_lookup xiangxia.m.yue
2019-10-02 2:11 ` Pravin Shelar
2019-10-08 3:21 ` Tonghao Zhang
2019-09-29 17:10 ` [PATCH net-next 8/9] net: openvswitch: fix possible memleak on destroy flow table xiangxia.m.yue
2019-09-29 17:10 ` [PATCH net-next 9/9] net: openvswitch: simplify the ovs_dp_cmd_new xiangxia.m.yue
2019-10-01 8:53 ` [PATCH net-next 0/9] optimize openvswitch flow looking up Eelco Chaudron
2019-10-03 17:08 ` [ovs-dev] " William Tu
2019-10-08 1:41 ` Tonghao Zhang
2019-10-01 21:58 ` David Miller
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