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Message-ID: <86802c440808212206s66c31203n651ca021c01104ca@mail.gmail.com>
Date: Thu, 21 Aug 2008 22:06:48 -0700
From: "Yinghai Lu" <yhlu.kernel@gmail.com>
To: "Ingo Molnar" <mingo@elte.hu>, "Cyrill Gorcunov" <gorcunov@gmail.com>
Subject: Re: [PATCH] x86: fix probe_nr_irqs for xen
Cc: "Jeremy Fitzhardinge" <jeremy@goop.org>,
       "Thomas Gleixner" <tglx@linutronix.de>,
       "H. Peter Anvin" <hpa@zytor.com>,
       "Andrew Morton" <akpm@linux-foundation.org>,
       linux-kernel@vger.kernel.org, "Alex Nixon" <alex.nixon@citrix.com>,
       "Alan Mayer" <ajm@sgi.com>
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On Thu, Aug 21, 2008 at 9:26 PM, Ingo Molnar <mingo@elte.hu> wrote:
>
> * Jeremy Fitzhardinge <jeremy@goop.org> wrote:
>
>> > hope we can kill nr_irqs/NR_IRQS
>>
>> When irqs are truely dynamically allocated?
>
> they in essence already are truly dynamic in tip/master. Not yet
> unconditionally so on x86, we chose to also have a !SPARSEIRQ build
> model to make sure dense IRQ arrays still work fine as well. (that's far
> easier to test and validate than to keep a farm of cross compilers to
> other arches alive.)
>
> But by all means SPARSEIRQ is the primary and only model on x86.
>
> We could even plug in the dynamic vector allocator from Alan Mayer now,
> both on 32-bit and on 64-bit x86: Yinghai, any complications expected
> there? I guess we need to unify the local APIC code first.

apic_32.c and apic_64.c
irqinit_32.c and irqinit_64.c
irq_32.c and irq_64.c

Cyrill, is still working on merging apic_32.c apic_64.c.?

YH
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