linux-kernel - Re: [PATCH] x86: make NR_IRQS on 32bit is same to 64bit

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Message-ID: <20081106222347.GB7505@elte.hu>
Date:	Thu, 6 Nov 2008 23:23:47 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Matt Mackall <mpm@...enic.com>
Cc:	"H. Peter Anvin" <hpa@...or.com>, Yinghai Lu <yinghai@...nel.org>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Ben Hutchings <bhutchings@...arflare.com>
Subject: Re: [PATCH] x86: make NR_IRQS on 32bit is same to 64bit


* Matt Mackall <mpm@...enic.com> wrote:

> On Wed, 2008-11-05 at 22:52 -0800, H. Peter Anvin wrote:
> > Yinghai Lu wrote:
> > >>
> > >> Clean-up sidenote: i think we can now remove the VISWS #ifdef portion
> > >> for good? Mind sending a patch for that too?
> > > 
> > > could remove CONFIG_PARAVIRT too.. Jeremy?
> > > 
> > 
> > This seems like a bad idea, especially for the embedded guys.
> 
> I'd actually really like to see us move to dynamically-allocated irq 
> tables as they're currently huge. But I haven't dug into it deeply 
> enough to see what sort of gotchas are involved.

sparseirq (== dynamic IRQ tables) is all implemented already, and most 
of the details except the final feature-enabler are upstream already.

	Ingo
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