From: Grant Grundler <grundler@cup.hp.com>
To: linux-ia64@vger.kernel.org
Subject: Re: [Linux-ia64] [PATCH] dynamic IRQ allocation
Date: Tue, 30 Jul 2002 05:01:28 +0000 [thread overview]
Message-ID: <marc-linux-ia64-105590701905852@msgid-missing> (raw)
In-Reply-To: <marc-linux-ia64-105590701905851@msgid-missing>
"KOCHI, Takayoshi" wrote:
> This patch fixes the behavior and only allocates vectors
> for existing pci_dev only.
Another approach is to defer allocating the vector until
request_irq() registers the interrupt handler. That way,
only devices that have drivers get interrupts.
> As usual, interrupt sharing often imply performance
> degradation and such a configuration should be avoided.
Another way to reduce/avoid sharing of vector table entries is to have
multiple Vector Tables. Either one for each CPU or each node of
a ccNUMA-like machine. I thought SGI's NUMA machines implement
this already but haven't checked.
grant
next prev parent reply other threads:[~2002-07-30 5:01 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-30 2:36 [Linux-ia64] [PATCH] dynamic IRQ allocation KOCHI, Takayoshi
2002-07-30 5:01 ` Grant Grundler [this message]
2002-07-30 18:04 ` KOCHI, Takayoshi
2002-07-30 22:14 ` Grant Grundler
2002-07-30 23:49 ` KOCHI, Takayoshi
2002-08-01 1:03 ` Grant Grundler
2002-08-02 0:39 ` KOCHI, Takayoshi
2002-08-02 6:04 ` David Mosberger
2002-08-02 15:56 ` Bjorn Helgaas
2002-08-02 16:32 ` David Mosberger
2002-08-02 17:45 ` KOCHI, Takayoshi
2002-08-02 18:58 ` Grant Grundler
2002-08-02 21:22 ` David Mosberger
2002-08-02 21:44 ` Bjorn Helgaas
2002-08-02 21:47 ` David Mosberger
2002-08-02 22:01 ` KOCHI, Takayoshi
2002-08-02 22:04 ` David Mosberger
2002-08-02 22:22 ` KOCHI, Takayoshi
2002-08-02 22:37 ` Grant Grundler
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