Re: [PATCH v7 04/10] nvme-pci: use block layer helpers to constrain queue affinity

[Hannes Reinecke <hare@suse.de>]

On 7/2/25 18:33, Daniel Wagner wrote:
> Ensure that IRQ affinity setup also respects the queue-to-CPU mapping
> constraints provided by the block layer. This allows the NVMe driver
> to avoid assigning interrupts to CPUs that the block layer has excluded
> (e.g., isolated CPUs).
> 
> Signed-off-by: Daniel Wagner <wagi@kernel.org>
> ---
>   drivers/nvme/host/pci.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
> index a509dc1f1d1400bc0de6d2f9424c126d9b966751..5293d5a3e5ee19427bec834741258be134bdc2c9 100644
> --- a/drivers/nvme/host/pci.c
> +++ b/drivers/nvme/host/pci.c
> @@ -2589,6 +2589,7 @@ static int nvme_setup_irqs(struct nvme_dev *dev, unsigned int nr_io_queues)
>   		.pre_vectors	= 1,
>   		.calc_sets	= nvme_calc_irq_sets,
>   		.priv		= dev,
> +		.mask		= blk_mq_possible_queue_affinity(),
>   	};
>   	unsigned int irq_queues, poll_queues;
>   	unsigned int flags = PCI_IRQ_ALL_TYPES | PCI_IRQ_AFFINITY;
> 

That was easy :-)

Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                  Kernel Storage Architect
hare@suse.de                                +49 911 74053 688
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