netdev - Re: [PATCH] pktgen node allocation

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Message-Id: <20100321.203744.43021126.davem@davemloft.net>
Date:	Sun, 21 Mar 2010 20:37:44 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	robert@...julf.net
Cc:	eric.dumazet@...il.com, netdev@...r.kernel.org
Subject: Re: [PATCH] pktgen node allocation

From: robert@...julf.net
Date: Fri, 19 Mar 2010 14:35:22 +0100

> 
> Eric Dumazet writes:
>  > Le vendredi 19 mars 2010 à 09:44 +0100, Robert Olsson a écrit :
>  > 
>  > I cannot understand how this can help.
>  > 
>  > __netdev_alloc_skb() is supposed to already take into account NUMA
>  > properties :
>  > 
>  > int node = dev->dev.parent ? dev_to_node(dev->dev.parent) : -1;
>  > 
>  > If this doesnt work, we should correct core stack, not only pktgen :)
>  > 
>  > Are you allocating memory in the node where pktgen CPU is running or the
>  > node close to the NIC ?
> 
>  I didn't say it should help the idea was to give some hooks to 
>  experiment and see effects with different node memory allocations.
>  There are many degrees of freedom wrt buses(device)/CPU/menory.

I think it's a useful feature and by default the netdev alloc
is still used, so... applied to net-next-2.6
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