Subject: Re: [PATCH] irq: Add node_affinity CPU masks for smarter irqbalance hints

From: Eric Dumazet <[email-masked]>
Date: Tue, 24 Nov 2009 19:58:18 +0100

David Miller a écrit :
> From: Eric Dumazet <[email-masked]>
> Date: Tue, 24 Nov 2009 19:26:15 +0100
> 
>> It seems complex to me, maybe optimal thing would be to use a NUMA policy to
>> spread vmalloc() allocations to all nodes to get a good bandwidth...
> 
> vmalloc() and sk_buff's don't currently mix and I really don't see us
> every allowing them to :-)

I think Peter was referring to tx/rx rings buffers, not sk_buffs.

They (ring buffers) are allocated with vmalloc() at driver init time.

And Tom pointed out that our rx sk_buff allocation should be using the node
of requester, no need to hardcode node number per rx queue (or per device as of today)