netdev - Re: [PATCH] macvlan: lockless tx path

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Date:	Wed, 10 Nov 2010 18:43:47 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Ben Greear <greearb@...delatech.com>
Cc:	David Miller <davem@...emloft.net>,
	Patrick McHardy <kaber@...sh.net>,
	netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH] macvlan: lockless tx path

Le mercredi 10 novembre 2010 à 09:39 -0800, Ben Greear a écrit :

> >   /**
> > - *	struct macvlan_rx_stats - MACVLAN percpu rx stats
> > + *	struct macvlan_pcpu_stats - MACVLAN percpu stats
> >    *	@rx_packets: number of received packets
> >    *	@rx_bytes: number of received bytes
> >    *	@rx_multicast: number of received multicast packets
> > + *	@tx_
> 
> Minor nit..seems you missed a few there?
> 

Arg... you're right !

> >    *	@syncp: synchronization point for 64bit counters
> >    *	@rx_errors: number of errors
> >    */
> > -struct macvlan_rx_stats {
> > +struct macvlan_pcpu_stats {
> >   	u64			rx_packets;
> >   	u64			rx_bytes;
> >   	u64			rx_multicast;
> > +	u64			tx_packets;
> > +	u64			tx_bytes;
> >   	struct u64_stats_sync	syncp;
> >   	unsigned long		rx_errors;
> > +	unsigned long		tx_dropped;
> 
> Any reason to not also make those u64?
> 

Well, they are supposed to be not incremented often, and they are packet
counts only, so a wrap around in less than 5 seconds is very unlikely.



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