diff options
Diffstat (limited to 'package/kernel/mac80211/patches/subsys/355-mac80211-run-late-dequeue-late-tx-handlers-without-h.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/subsys/355-mac80211-run-late-dequeue-late-tx-handlers-without-h.patch | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/subsys/355-mac80211-run-late-dequeue-late-tx-handlers-without-h.patch b/package/kernel/mac80211/patches/subsys/355-mac80211-run-late-dequeue-late-tx-handlers-without-h.patch new file mode 100644 index 0000000000..3127c86822 --- /dev/null +++ b/package/kernel/mac80211/patches/subsys/355-mac80211-run-late-dequeue-late-tx-handlers-without-h.patch @@ -0,0 +1,55 @@ +From: Felix Fietkau <nbd@nbd.name> +Date: Sat, 16 Mar 2019 18:00:12 +0100 +Subject: [PATCH] mac80211: run late dequeue late tx handlers without + holding fq->lock + +Reduces lock contention on enqueue/dequeue of iTXQ packets + +Signed-off-by: Felix Fietkau <nbd@nbd.name> +--- + +--- a/net/mac80211/tx.c ++++ b/net/mac80211/tx.c +@@ -3507,6 +3507,7 @@ struct sk_buff *ieee80211_tx_dequeue(str + ieee80211_tx_result r; + struct ieee80211_vif *vif = txq->vif; + ++begin: + spin_lock_bh(&fq->lock); + + if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags) || +@@ -3523,11 +3524,12 @@ struct sk_buff *ieee80211_tx_dequeue(str + if (skb) + goto out; + +-begin: + skb = fq_tin_dequeue(fq, tin, fq_tin_dequeue_func); + if (!skb) + goto out; + ++ spin_unlock_bh(&fq->lock); ++ + hdr = (struct ieee80211_hdr *)skb->data; + info = IEEE80211_SKB_CB(skb); + +@@ -3573,8 +3575,11 @@ begin: + + skb = __skb_dequeue(&tx.skbs); + +- if (!skb_queue_empty(&tx.skbs)) ++ if (!skb_queue_empty(&tx.skbs)) { ++ spin_lock_bh(&fq->lock); + skb_queue_splice_tail(&tx.skbs, &txqi->frags); ++ spin_unlock_bh(&fq->lock); ++ } + } + + if (skb && skb_has_frag_list(skb) && +@@ -3613,6 +3618,7 @@ begin: + } + + IEEE80211_SKB_CB(skb)->control.vif = vif; ++ return skb; + + out: + spin_unlock_bh(&fq->lock); |