Am 22.12.2016 um 13:34 schrieb Ferran Quer i Guerrero:
> Hello everyone,
>
> I would like to modify the retry threshold for dropping a packet using
> mesh mode. I tried with iw
>
> iw phy <phyname> set retry [short <limit>] [long <limit>]
>
> with short and long limits equal to 10 first and later 5, but I couldn't
> tell any effect. I'm checking by adding a printk in `status.c` and
> manually shutting down (ifdown) the mesh-peered interface to cause
> packet retries. It turns out that the tx report only appears when
> `retry_count` is 28 (after many continued drops, it also appears at 23,
> 24, 25 or retries).
>
> void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
> {
> /* ... */
> if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
> ieee80211_handle_filtered_frame(local, sta, skb);
> rcu_read_unlock();
> return;
> } else {
> if (!acked)
> sta->tx_retry_failed++;
> sta->tx_retry_count += retry_count;
> /* Dirty debugging */
> printk("Packet dropped. Retry count: %d",
> retry_count);
> }
>
> rate_control_tx_status(local, sband, sta, skb);
> if (ieee80211_vif_is_mesh(&sta->sdata->vif))
> ieee80211s_update_metric(local, sta, skb);
> /* ... */
> }
>
> I'm using linux backports v3.12.8, ath9k wifi dongles, and interfaces on
> mesh point mode.
are you talking about usb dongles? If yes, then it is not ath9k
--
Regards,
Oleksij
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