linux-kernel - Re: [PATCH v2 2/6] PCI/MSI: Factor out pci_get_msi

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Date:	Thu, 26 Sep 2013 14:13:25 +0200
From:	Alexander Gordeev <agordeev@...hat.com>
To:	David Laight <David.Laight@...LAB.COM>
Cc:	Tejun Heo <tj@...nel.org>, linux-pci@...r.kernel.org,
	Joerg Roedel <joro@...tes.org>, x86@...nel.org,
	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org,
	Jan Beulich <JBeulich@...e.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	linuxppc-dev@...ts.ozlabs.org, Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH v2 2/6] PCI/MSI: Factor out pci_get_msi_cap() interface

On Thu, Sep 26, 2013 at 12:34:36PM +0100, David Laight wrote:
> I was thinking that the first call would be done during driver probe
> (assuming such a time exists) so that the subsystem could determine
> how many interrupts all the drivers would like, so it can then
> hand out a smaller number to some of the early drivers in order
> to have some left to satisfy the minimum requirement of later
> ones.
> 
> So all it would do is sum the requirements of all the drivers.

It is already implemented - please see commit 448e2ca ("powerpc/pseries:
Implement a quota system for MSIs")

All other archs do not have MSI vector space limitations.

> 	David

-- 
Regards,
Alexander Gordeev
agordeev@...hat.com
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