Re: [PATCH RFC V2 2/2] net: Optimize snmp stat aggregation by walking all the percpu data at once

[David Miller]

From: Raghavendra K T <raghavendra.kt@xxxxxxxxxxxxxxxxxx>
Date: Wed, 26 Aug 2015 23:07:33 +0530

> @@ -4641,10 +4647,12 @@ static inline void __snmp6_fill_stats64(u64 *stats, void __percpu *mib,
>  static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
>  			     int bytes)
>  {
> +	u64 buff[IPSTATS_MIB_MAX] = {0,};
> +
>  	switch (attrtype) {
>  	case IFLA_INET6_STATS:
> -		__snmp6_fill_stats64(stats, idev->stats.ipv6,

I would suggest using an explicit memset() here, it makes the overhead incurred
by this scheme clearer.

Thanks.
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