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Commit 0972fa57 authored Jul 04, 2016 by Thomas Gleixner

genirq/msi: Make use of affinity aware allocations



Allow the MSI code to provide affinity hints per MSI descriptor.

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/1467621574-8277-6-git-send-email-hch@lst.de


Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

parent 45ddcecb

include/linux/msi.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -47,6 +47,7 @@ struct fsl_mc_msi_desc {
		* @nvec_used: The number of vectors used
		* @dev: Pointer to the device which uses this descriptor
		* @msg: The last set MSI message cached for reuse
		* @affinity: Optional pointer to a cpu affinity mask for this descriptor
		*
		* @masked: [PCI MSI/X] Mask bits
		* @is_msix: [PCI MSI/X] True if MSI-X
		@@ -67,6 +68,7 @@ struct msi_desc {
		unsigned int nvec_used;
		struct device *dev;
		struct msi_msg msg;
		const struct cpumask *affinity;

		union {
		/* PCI MSI/X specific data */

kernel/irq/msi.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -335,7 +335,7 @@ int msi_domain_alloc_irqs(struct irq_domain domain, struct device dev,

		virq = __irq_domain_alloc_irqs(domain, -1, desc->nvec_used,
		dev_to_node(dev), &arg, false,
		NULL);
		desc->affinity);
		if (virq < 0) {
		ret = -ENOSPC;
		if (ops->handle_error)