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

From: Eric Dumazet <[email-masked]>
Date: Tue, 24 Nov 2009 21:46:28 +0100

Andi Kleen a écrit :
> They are typically allocated with dma_alloc_coherent(), which does
> allocate a continuous area.  In theory you could do interleaving
> with IOMMus, but just putting it on the same node as the device
> is probably better.

There are two parts, biggest one allocated with vmalloc()
(to hold struct ixgbe_rx_buffer array, 32 bytes or more per entry),
only used by driver (not adapter)

and one allocated with pci_alloc_consistent() 
(to hold ixgbe_adv_tx_desc array, 16 bytes per entry)

vmalloc() one could be spreaded on many nodes.
I am not speaking about the pci_alloc_consistent() one :)