linux-kernel - Re: PCIE

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Message-ID: <4658BB6D.5030603@gmail.com>
Date:	Sun, 27 May 2007 02:57:49 +0400
From:	Manu Abraham <abraham.manu@...il.com>
To:	David Miller <davem@...emloft.net>
CC:	rdreier@...co.com, greg@...ah.com,
	linux-pci@...ey.karlin.mff.cuni.cz, linux-kernel@...r.kernel.org
Subject: Re: PCIE

David Miller wrote:
> From: Manu Abraham <abraham.manu@...il.com>
> Date: Sat, 26 May 2007 19:03:12 +0400
> 
>> i presume then i shouldn't be using IRQF_SHARED, if using MSI.
> 
> That's actually a really good question.
> 
> It is likely architecture dependant whether the PCI controller wires
> unique MSI interrupts to shared cpu interrupt lines.
> 
> I can imagine many systems where the cpu simply doesn't have enough
> interrupt pins to uniquely identify every possible MSI interrupt
> source.
> 

Ok, that explains it a bit, but i am pulling out a bit of hair on the
other aspects i wrote in this thread, of course i am a bit new to PCIe
and hence all my questions/doubts. Hope someone can clear them.

Thanks,
Manu

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