From: Ben Greear <greearb@xxxxxxxxxxxxxxx>
By default, the rhashtable logic will fail to insert
objects if the key-chains are too long and un-balanced.
In the degenerate case where mac80211 is creating many
station vdevs connected to the same peer, this case can
be hit.
So, set insecure_elasticity to true to allow chains to grow
as long as needed.
Signed-off-by: Ben Greear <greearb@xxxxxxxxxxxxxxx>
---
net/mac80211/sta_info.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index 38ef0be..c25b945 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -66,6 +66,7 @@
static const struct rhashtable_params sta_rht_params = {
.nelem_hint = 3, /* start small */
+ .insecure_elasticity = true, /* Disable chain-length checks. */
.automatic_shrinking = true,
.head_offset = offsetof(struct sta_info, hash_node),
.key_offset = offsetof(struct sta_info, addr),
@@ -322,8 +323,11 @@ static int sta_info_hash_add(struct ieee80211_local *local,
rv = rhashtable_insert_fast(&local->sta_hash, &sta->hash_node,
sta_rht_params);
- if (rv != 0)
+ if (rv != 0) {
+ pr_err("Failed to insert sta %pM in rhashtable, idx: %d err: %d\n",
+ sta->sta.addr, idx, rv);
return rv;
+ }
sta->vnext = sta->sdata->sta_vhash[idx];
rcu_assign_pointer(sta->sdata->sta_vhash[idx], sta);
--
2.4.3
--
To unsubscribe from this list: send the line "unsubscribe linux-wireless" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
