diff options
| author |   Felix Fietkau <nbd@nbd.name> | 2019-03-16 18:06:33 +0100 |
|---|---|---|
| committer |   Johannes Berg <johannes.berg@intel.com> | 2019-04-26 13:02:11 +0200 |
| commit | ded4698b58cb23c22b0dcbd829ced19ce4e6ce02 (patch) | |
| tree | 9a386c23393fb39600f5ed1a5763e7285143502d /net/mac80211 | |
| parent | mac80211: calculate hash for fq without holding fq->lock in itxq enqueue (diff) | |
| download | linux-dev-ded4698b58cb23c22b0dcbd829ced19ce4e6ce02.tar.xz linux-dev-ded4698b58cb23c22b0dcbd829ced19ce4e6ce02.zip | |
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>
Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211')
| -rw-r--r-- | net/mac80211/tx.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index 2c0fec888021..a3c6053cdffe 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -3535,6 +3535,7 @@ struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw, ieee80211_tx_result r; struct ieee80211_vif *vif = txq->vif; +begin: spin_lock_bh(&fq->lock); if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags) || @@ -3551,11 +3552,12 @@ struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw, 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); @@ -3600,8 +3602,11 @@ 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_has_frag_list(skb) && @@ -3640,6 +3645,7 @@ begin: } IEEE80211_SKB_CB(skb)->control.vif = vif; + return skb; out: spin_unlock_bh(&fq->lock); |