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net/fq_impl: use skb_get_hash instead of skb_get_hash_perturb

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This avoids unnecessarily regenerating the skb flow hash

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Link: https://lore.kernel.org/r/20200726130947.88145-1-nbd@nbd.name
[small commit message fixup]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Felix Fietkau 2020-07-26 15:09:46 +02:00 • committed by Johannes Berg
parent 3ff901cb5d
commit 48a54f6bc4
2 changed files with 1 additions and 3 deletions
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1
include/net/fq.h
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@ -69,7 +69,6 @@ struct fq {
struct list_head backlogs; struct list_head backlogs;
spinlock_t lock; spinlock_t lock;
u32 flows_cnt; u32 flows_cnt;
siphash_key_t perturbation;
u32 limit; u32 limit;
u32 memory_limit; u32 memory_limit;
u32 memory_usage; u32 memory_usage;

3
include/net/fq_impl.h
View file

@ -108,7 +108,7 @@ begin:
static u32 fq_flow_idx(struct fq *fq, struct sk_buff *skb) static u32 fq_flow_idx(struct fq *fq, struct sk_buff *skb)
{ {
u32 hash = skb_get_hash_perturb(skb, &fq->perturbation); u32 hash = skb_get_hash(skb);
return reciprocal_scale(hash, fq->flows_cnt); return reciprocal_scale(hash, fq->flows_cnt);
} }
@ -308,7 +308,6 @@ static int fq_init(struct fq *fq, int flows_cnt)
INIT_LIST_HEAD(&fq->backlogs); INIT_LIST_HEAD(&fq->backlogs);
spin_lock_init(&fq->lock); spin_lock_init(&fq->lock);
fq->flows_cnt = max_t(u32, flows_cnt, 1); fq->flows_cnt = max_t(u32, flows_cnt, 1);
get_random_bytes(&fq->perturbation, sizeof(fq->perturbation));
fq->quantum = 300; fq->quantum = 300;
fq->limit = 8192; fq->limit = 8192;
fq->memory_limit = 16 << 20; /* 16 MBytes */ fq->memory_limit = 16 << 20; /* 16 MBytes */