Re: [PATCH] Per cpu irq stat

From: Christoph Hellwig
Date: Tue Mar 15 2005 - 04:16:15 EST

On Mon, Mar 14, 2005 at 10:32:34PM -0800, Christoph Lameter wrote:
> The definition of the irq_stat as an array means that the individual
> elements of the irq_stat array are located on one NUMA node requiring
> internode traffic to access irq_stat from other nodes. This patch makes
> irq_stat a per_cpu variable which allows most accesses to be local.

There's architectures accessing it from assemly.

But furthermore there's absolutely not point for the irq_stat structure
at all anymore now that we have the per_cpu infrastructure. so kill it
completely and let every architecture just provide a local_softirq_pending

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