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Date: Mon, 07 Aug 2006 09:55:09 -0600 From: ebiederm@...ssion.com (Eric W. Biederman) To: Andi Kleen <ak@...e.de> Cc: Andrew Morton <akpm@...l.org>, "Protasevich, Natalie" <Natalie.Protasevich@...sys.com>, linux-kernel@...r.kernel.org Subject: Re: [PATCH] x86_64: Make NR_IRQS configurable in Kconfig Andi Kleen <ak@...e.de> writes: > On Monday 07 August 2006 17:26, Eric W. Biederman wrote: >> >> Currrently on a SMP system we can theoretically support >> NR_CPUS*224 irqs. Unfortunately our data structures >> don't cope will with that many irqs, nor does hardware >> typically provide that many irq sources. >> >> With the number of cores starting to follow Moores >> law, and the apicid limits being raised beyond an 8bit >> number trying to track our current maximum with our >> current data structures would be fatal and wasteful. >> >> So this patch decouples the number of irqs we support >> from the number of cpus. We can revisit this decision >> once someone reworks the current data structures. > > Ok. I was about to apply it, but it seems to require > mm patches right now, so i didn't Right. This is post 2.6.18 material, that is getting the final bug fixes now. So it will be ready when 2.6.19 opens up. Andi I just wanted to make certain you saw it. :) Eric - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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