linux-kernel - Re: [PATCH 1/7] genirq/affinity: Introduce struct irq

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Message-ID: <20161108081917.xgakcmof2koldr6n@linux-x5ow.site>
Date:   Tue, 8 Nov 2016 09:19:17 +0100
From:   Johannes Thumshirn <jthumshirn@...e.de>
To:     Christoph Hellwig <hch@....de>
Cc:     tglx@...utronix.de, axboe@...nel.dk, linux-block@...r.kernel.org,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/7] genirq/affinity: Introduce struct irq_affinity

On Mon, Nov 07, 2016 at 10:47:36AM -0800, Christoph Hellwig wrote:
> From: Christogh Hellwig <hch@....de>
> 
> Some drivers (various network and RDMA adapter for example) have a MSI-X
> vector layout where most of the vectors are used for I/O queues and should
> have CPU affinity assigned to them, but some (usually 1 but sometimes more)
> at the beginning or end are used for low-performance admin or configuration
> work and should not have any explicit affinity assigned to them.
> 
> This adds a new irq_affinity structure, which will be passed through a
> variant of pci_irq_alloc_vectors that allows to specify these
> requirements (and is extensible to any future quirks in that area) so that
> the core IRQ affinity algorithm can take this quirks into account.
> 
> Signed-off-by: Christogh Hellwig <hch@....de>
> ---

Looks good,
Reviewed-by: Johannes Thumshirn <jthumshirn@...e.de>

-- 
Johannes Thumshirn                                          Storage
jthumshirn@...e.de                                +49 911 74053 689
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