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net: limit each hash list length to MAX_GRO_SKBS

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After commit 07d78363dc ("net: Convert NAPI gro list into a small hash
table.")' there is 8 hash buckets, which allows more flows to be held for
merging.  but MAX_GRO_SKBS, the total held skb for merging, is 8 skb still,
limit the hash table performance.

keep MAX_GRO_SKBS as 8 skb, but limit each hash list length to 8 skb, not
the total 8 skb

Signed-off-by: Li RongQing <lirongqing@baidu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Li RongQing 2018-07-05 14:34:32 +08:00 • committed by David S. Miller
parent 6fcf9b1d4d
commit 6312fe7775
2 changed files with 29 additions and 34 deletions
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7
include/linux/netdevice.h
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@ -302,6 +302,11 @@ struct netdev_boot_setup {
int __init netdev_boot_setup(char *str);
struct gro_list {
struct list_head list;
int count;
};
/*
* Structure for NAPI scheduling similar to tasklet but with weighting
*/
@ -323,7 +328,7 @@ struct napi_struct {
int poll_owner;
#endif
struct net_device *dev;
struct list_head gro_hash[GRO_HASH_BUCKETS];
struct gro_list gro_hash[GRO_HASH_BUCKETS];
struct sk_buff *skb;
struct hrtimer timer;
struct list_head dev_list;