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genirq: Add affinity hint to irq allocation

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Add an extra argument to the irq(domain) allocation functions, so we can hand
down affinity hints to the allocator. Thats necessary to implement proper
support for multiqueue devices.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: linux-block@vger.kernel.org
Cc: linux-pci@vger.kernel.org
Cc: linux-nvme@lists.infradead.org
Cc: axboe@fb.com
Cc: agordeev@redhat.com
Link: http://lkml.kernel.org/r/1467621574-8277-4-git-send-email-hch@lst.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner
2016-07-04 17:39:24 +09:00
parent 9c2555835b
commit 06ee6d571f
9 changed files with 41 additions and 25 deletions
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7
kernel/irq/manage.c
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@@ -353,10 +353,11 @@ static int setup_affinity(struct irq_desc *desc, struct cpumask *mask)
return 0;
/*
* Preserve an userspace affinity setup, but make sure that
* one of the targets is online.
* Preserve the managed affinity setting and an userspace affinity
* setup, but make sure that one of the targets is online.
*/
if (irqd_has_set(&desc->irq_data, IRQD_AFFINITY_SET)) {
if (irqd_affinity_is_managed(&desc->irq_data) ||
irqd_has_set(&desc->irq_data, IRQD_AFFINITY_SET)) {
if (cpumask_intersects(desc->irq_common_data.affinity,
cpu_online_mask))
set = desc->irq_common_data.affinity;