Messages in this thread | | | Subject | Re: [PATCH] irq: Add node_affinity CPU masks for smarter irqbalance hints | From | Andi Kleen <> | Date | Tue, 24 Nov 2009 21:35:41 +0100 |
| |
Eric Dumazet <eric.dumazet@gmail.com> writes:
> David Miller a écrit : >> From: Eric Dumazet <eric.dumazet@gmail.com> >> 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.
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.
-Andi -- ak@linux.intel.com -- Speaking for myself only. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |