linux-kernel - automatic IRQ affinity for virtio

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Message-Id: <1479379403-27880-1-git-send-email-hch@lst.de>
Date:   Thu, 17 Nov 2016 11:43:12 +0100
From:   Christoph Hellwig <hch@....de>
To:     mst@...hat.com
Cc:     axboe@...nel.dk, virtualization@...ts.linux-foundation.org,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: automatic IRQ affinity for virtio

Hi Michael,

this series contains a couple cleanups for the virtio_pci interrupt
handling code, including a switch to the new pci_irq_alloc_vectors
helper, and support for automatic affinity by the PCI layer if the
consumers ask for it.  It then converts over virtio_blk to use this
functionality so that it's blk-mq queues are aligned to the MSI-X
vector routing.  I have a similar patch in the queue for virtio-scsi,
but that would require pulling in the SCSI tree, so I'm not sure if
you'd like it for this window, but if you do I can send it in another
series.  The third driver using per-CPU virtqueues is virtio_net,
but that will take some more time as I haven't started work on the
networking infrastructure yet.

Note that these patches require core IRQ changes from a stable
branch in the tip tree to be pulled in first:

	git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git irq/for-block

Gitweb:

	https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git/log/?h=irq/for-block