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37 lines
1.2 KiB
Diff
37 lines
1.2 KiB
Diff
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From: Felix Fietkau <nbd@nbd.name>
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Date: Sat, 25 Jun 2022 23:10:19 +0200
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Subject: [PATCH] mac80211: only accumulate airtime deficit for active
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clients
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When a client does not generate any local tx activity, accumulating airtime
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deficit for the round-robin scheduler can be harmful. If this goes on for too
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long, the deficit could grow quite large, which might cause unreasonable
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initial latency once the client becomes active
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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--- a/net/mac80211/sta_info.c
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+++ b/net/mac80211/sta_info.c
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@@ -1900,6 +1900,7 @@ void ieee80211_sta_register_airtime(stru
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struct ieee80211_local *local = sta->sdata->local;
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u8 ac = ieee80211_ac_from_tid(tid);
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u32 airtime = 0;
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+ u32 diff;
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if (sta->local->airtime_flags & AIRTIME_USE_TX)
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airtime += tx_airtime;
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@@ -1909,7 +1910,11 @@ void ieee80211_sta_register_airtime(stru
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spin_lock_bh(&local->active_txq_lock[ac]);
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sta->airtime[ac].tx_airtime += tx_airtime;
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sta->airtime[ac].rx_airtime += rx_airtime;
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- sta->airtime[ac].deficit -= airtime;
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+
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+ diff = (u32)jiffies - sta->airtime[ac].last_active;
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+ if (diff <= AIRTIME_ACTIVE_DURATION)
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+ sta->airtime[ac].deficit -= airtime;
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+
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spin_unlock_bh(&local->active_txq_lock[ac]);
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}
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EXPORT_SYMBOL(ieee80211_sta_register_airtime);
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