diff options
| author |   Felix Fietkau <nbd@openwrt.org> | 2014-05-23 20:05:28 +0200 |
|---|---|---|
| committer |   Johannes Berg <johannes.berg@intel.com> | 2014-05-28 16:22:48 +0200 |
| commit | abd43a6a68b2f69821eef3daf789242b262ba2c0 (patch) | |
| tree | 727522f4ce78e2f36af5a3e97fc7ef6bbca05629 /net | |
| parent | mac80211: don't check netdev state for debugfs read/write (diff) | |
| download | linux-dev-abd43a6a68b2f69821eef3daf789242b262ba2c0.tar.xz linux-dev-abd43a6a68b2f69821eef3daf789242b262ba2c0.zip | |
mac80211: reduce packet loss notifications under load
During strong signal fluctuations under high throughput, few consecutive
failed A-MPDU transmissions can easily trigger packet loss notification,
and thus (in AP mode) client disconnection.
Reduce the number of false positives by checking the A-MPDU status flag
and treating a failed A-MPDU as a single packet.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/mac80211/status.c | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/net/mac80211/status.c b/net/mac80211/status.c index e6e574a307c8..bfa5326776ab 100644 --- a/net/mac80211/status.c +++ b/net/mac80211/status.c @@ -542,6 +542,23 @@ static void ieee80211_tx_latency_end_msrmnt(struct ieee80211_local *local, */ #define STA_LOST_PKT_THRESHOLD 50 +static void ieee80211_lost_packet(struct sta_info *sta, struct sk_buff *skb) +{ + struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); + + /* This packet was aggregated but doesn't carry status info */ + if ((info->flags & IEEE80211_TX_CTL_AMPDU) && + !(info->flags & IEEE80211_TX_STAT_AMPDU)) + return; + + if (++sta->lost_packets < STA_LOST_PKT_THRESHOLD) + return; + + cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, + sta->lost_packets, GFP_ATOMIC); + sta->lost_packets = 0; +} + void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) { struct sk_buff *skb2; @@ -680,12 +697,8 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) if (info->flags & IEEE80211_TX_STAT_ACK) { if (sta->lost_packets) sta->lost_packets = 0; - } else if (++sta->lost_packets >= STA_LOST_PKT_THRESHOLD) { - cfg80211_cqm_pktloss_notify(sta->sdata->dev, - sta->sta.addr, - sta->lost_packets, - GFP_ATOMIC); - sta->lost_packets = 0; + } else { + ieee80211_lost_packet(sta, skb); } } |