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From: Thomas Gleixner <tglx@linutronix.de>
To: Haojian Zhuang <haojian.zhuang@gmail.com>
Cc: linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [question] NR_IRQS in genirq
Date: Wed, 24 Nov 2010 14:18:39 +0100 (CET)	[thread overview]
Message-ID: <alpine.LFD.2.00.1011241416360.2900@localhost6.localdomain6> (raw)
In-Reply-To: <AANLkTimoBdFyQ6GfS2DKiF0wdRox0x7MfM0_keD9Z1D0@mail.gmail.com>

On Wed, 24 Nov 2010, Haojian Zhuang wrote:

> Hi all,
> 
> I'm using the latest kernel 2.6.37-rc1. Now I met some issues on genirq.
> 
> 1. While SPARSE IRQ is enabled, nr_irqs may be larger than NR_IRQS.
> But the allocated_irqs bitmap (kernel/irq/irqdesc.c) is restricted in
> NR_IRQS. Is it an issue?

Why can nr_irqs become larger? Is that a theoretical problem or did
you run into this ?

Thanks,

	tglx



  parent reply	other threads:[~2010-11-24 13:18 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-11-24  7:28 Haojian Zhuang
2010-11-24  8:46 ` Paul Mundt
2010-11-24 13:56   ` Thomas Gleixner
2010-11-24 13:18 ` Thomas Gleixner [this message]
2010-11-24 13:46   ` Haojian Zhuang
2010-11-24 13:50     ` Mark Brown
2010-11-24 13:54       ` Thomas Gleixner
2010-11-24 14:00         ` Mark Brown
2010-11-24 13:53     ` Thomas Gleixner

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