diff options
Diffstat (limited to 'package/kernel/mac80211/patches/subsys/336-mac80211-only-accumulate-airtime-deficit-for-active-.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/subsys/336-mac80211-only-accumulate-airtime-deficit-for-active-.patch | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/subsys/336-mac80211-only-accumulate-airtime-deficit-for-active-.patch b/package/kernel/mac80211/patches/subsys/336-mac80211-only-accumulate-airtime-deficit-for-active-.patch new file mode 100644 index 0000000000..35f07c1a97 --- /dev/null +++ b/package/kernel/mac80211/patches/subsys/336-mac80211-only-accumulate-airtime-deficit-for-active-.patch @@ -0,0 +1,36 @@ +From: Felix Fietkau <nbd@nbd.name> +Date: Sat, 25 Jun 2022 23:10:19 +0200 +Subject: [PATCH] mac80211: only accumulate airtime deficit for active + clients + +When a client does not generate any local tx activity, accumulating airtime +deficit for the round-robin scheduler can be harmful. If this goes on for too +long, the deficit could grow quite large, which might cause unreasonable +initial latency once the client becomes active + +Signed-off-by: Felix Fietkau <nbd@nbd.name> +--- + +--- a/net/mac80211/sta_info.c ++++ b/net/mac80211/sta_info.c +@@ -1900,6 +1900,7 @@ void ieee80211_sta_register_airtime(stru + struct ieee80211_local *local = sta->sdata->local; + u8 ac = ieee80211_ac_from_tid(tid); + u32 airtime = 0; ++ u32 diff; + + if (sta->local->airtime_flags & AIRTIME_USE_TX) + airtime += tx_airtime; +@@ -1909,7 +1910,11 @@ void ieee80211_sta_register_airtime(stru + spin_lock_bh(&local->active_txq_lock[ac]); + sta->airtime[ac].tx_airtime += tx_airtime; + sta->airtime[ac].rx_airtime += rx_airtime; +- sta->airtime[ac].deficit -= airtime; ++ ++ diff = (u32)jiffies - sta->airtime[ac].last_active; ++ if (diff <= AIRTIME_ACTIVE_DURATION) ++ sta->airtime[ac].deficit -= airtime; ++ + spin_unlock_bh(&local->active_txq_lock[ac]); + } + EXPORT_SYMBOL(ieee80211_sta_register_airtime); |