gro: Remember number of held packets instead of counting every time
This patch prepares for the move of the same_flow checks out of
dev_gro_receive. As such we need to remember the number of held
packets since doing a loop just to count them every time is silly.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/dev.c b/net/core/dev.c
index 709a9a9..ae0b669 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2372,6 +2372,7 @@
napi_gro_complete(skb);
}
+ napi->gro_count = 0;
napi->gro_list = NULL;
}
EXPORT_SYMBOL(napi_gro_flush);
@@ -2402,7 +2403,6 @@
struct packet_type *ptype;
__be16 type = skb->protocol;
struct list_head *head = &ptype_base[ntohs(type) & PTYPE_HASH_MASK];
- int count = 0;
int same_flow;
int mac_len;
int ret;
@@ -2430,8 +2430,6 @@
NAPI_GRO_CB(skb)->free = 0;
for (p = napi->gro_list; p; p = p->next) {
- count++;
-
if (!NAPI_GRO_CB(p)->same_flow)
continue;
@@ -2457,15 +2455,16 @@
*pp = nskb->next;
nskb->next = NULL;
napi_gro_complete(nskb);
- count--;
+ napi->gro_count--;
}
if (same_flow)
goto ok;
- if (NAPI_GRO_CB(skb)->flush || count >= MAX_GRO_SKBS)
+ if (NAPI_GRO_CB(skb)->flush || napi->gro_count >= MAX_GRO_SKBS)
goto normal;
+ napi->gro_count++;
NAPI_GRO_CB(skb)->count = 1;
skb_shinfo(skb)->gso_size = skb_gro_len(skb);
skb->next = napi->gro_list;
@@ -2713,6 +2712,7 @@
int (*poll)(struct napi_struct *, int), int weight)
{
INIT_LIST_HEAD(&napi->poll_list);
+ napi->gro_count = 0;
napi->gro_list = NULL;
napi->skb = NULL;
napi->poll = poll;
@@ -2741,6 +2741,7 @@
}
napi->gro_list = NULL;
+ napi->gro_count = 0;
}
EXPORT_SYMBOL(netif_napi_del);
@@ -5246,6 +5247,7 @@
queue->backlog.poll = process_backlog;
queue->backlog.weight = weight_p;
queue->backlog.gro_list = NULL;
+ queue->backlog.gro_count = 0;
}
dev_boot_phase = 0;