diff options
| author | Felix Fietkau <nbd@nbd.name> | 2019-03-16 18:06:32 +0100 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2019-04-26 13:02:11 +0200 |
| commit | f2af2df800d3648b1d68e02d5b8a5d77cfee8970 (patch) | |
| tree | 69cb5581837cb2a5396696432effdf0002a72a64 /include/net/fq_impl.h | |
| parent | ef618b1bd6843cca42781acda829c429f337046f (diff) | |
| download | linux-f2af2df800d3648b1d68e02d5b8a5d77cfee8970.tar.gz linux-f2af2df800d3648b1d68e02d5b8a5d77cfee8970.tar.bz2 linux-f2af2df800d3648b1d68e02d5b8a5d77cfee8970.zip | |
mac80211: calculate hash for fq without holding fq->lock in itxq enqueue
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 'include/net/fq_impl.h')
| -rw-r--r-- | include/net/fq_impl.h | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/include/net/fq_impl.h b/include/net/fq_impl.h index be7c0fab3478..2caa86660ab0 100644 --- a/include/net/fq_impl.h +++ b/include/net/fq_impl.h @@ -107,21 +107,23 @@ begin: return skb; } +static u32 fq_flow_idx(struct fq *fq, struct sk_buff *skb) +{ + u32 hash = skb_get_hash_perturb(skb, fq->perturbation); + + return reciprocal_scale(hash, fq->flows_cnt); +} + static struct fq_flow *fq_flow_classify(struct fq *fq, - struct fq_tin *tin, + struct fq_tin *tin, u32 idx, struct sk_buff *skb, fq_flow_get_default_t get_default_func) { struct fq_flow *flow; - u32 hash; - u32 idx; lockdep_assert_held(&fq->lock); - hash = skb_get_hash_perturb(skb, fq->perturbation); - idx = reciprocal_scale(hash, fq->flows_cnt); flow = &fq->flows[idx]; - if (flow->tin && flow->tin != tin) { flow = get_default_func(fq, tin, idx, skb); tin->collisions++; @@ -153,7 +155,7 @@ static void fq_recalc_backlog(struct fq *fq, } static void fq_tin_enqueue(struct fq *fq, - struct fq_tin *tin, + struct fq_tin *tin, u32 idx, struct sk_buff *skb, fq_skb_free_t free_func, fq_flow_get_default_t get_default_func) @@ -163,7 +165,7 @@ static void fq_tin_enqueue(struct fq *fq, lockdep_assert_held(&fq->lock); - flow = fq_flow_classify(fq, tin, skb, get_default_func); + flow = fq_flow_classify(fq, tin, idx, skb, get_default_func); flow->tin = tin; flow->backlog += skb->len; |