automatic interrupt affinity for MSI/MSI-X capable devices V2

From	Christoph Hellwig <hch@lst.de>
Newsgroups	linux.kernel
Subject	automatic interrupt affinity for MSI/MSI-X capable devices V2
Date	2016-06-14 22:00 +0200
Message-ID	<rK2Fb-Rz-3@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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This series enhances the irq and PCI code to allow spreading around MSI and
MSI-X vectors so that they have per-cpu affinity if possible, or at least
per-node.  For that it takes the algorithm from blk-mq, moves it to
a common place, and makes it available through a vastly simplified PCI
interrupt allocation API.  It then switches blk-mq to be able to pick up
the queue mapping from the device if available, and demonstrates all this
using the NVMe driver.

There also is a git tree available at:

   git://git.infradead.org/users/hch/block.git

Gitweb:

   http://git.infradead.org/users/hch/block.git/shortlog/refs/heads/msix-spreading.4

Changes since V1:
 - irq core improvements to properly assign the affinity before
   request_irq (tglx)
 - better handling of the MSI vs MSI-X differences in the low level
   MSI allocator (hch and tglx)
 - various improvements to pci_alloc_irq_vectors (hch)
 - remove blk-mq hardware queue reassigned on hotplug cpu events (hch)
 - forward ported to Jens' current for-next tree (hch)

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automatic interrupt affinity for MSI/MSI-X capable devices V2 Christoph Hellwig <hch@lst.de> - 2016-06-14 22:00 +0200
  [PATCH 03/13] irq: Add affinity hint to irq allocation Christoph Hellwig <hch@lst.de> - 2016-06-14 22:00 +0200
  [PATCH 11/13] blk-mq: allow the driver to pass in an affinity mask Christoph Hellwig <hch@lst.de> - 2016-06-14 22:00 +0200
  [PATCH 06/13] irq: add a helper spread an affinity mask for MSI/MSI-X vectors Christoph Hellwig <hch@lst.de> - 2016-06-14 22:00 +0200
    Re: [PATCH 06/13] irq: add a helper spread an affinity mask for  MSI/MSI-X vectors "Guilherme G. Piccoli" <gpiccoli@linux.vnet.ibm.com> - 2016-06-15 00:00 +0200
      Re: [PATCH 06/13] irq: add a helper spread an affinity mask for  MSI/MSI-X vectors Christoph Hellwig <hch@lst.de> - 2016-06-15 12:20 +0200
        Re: [PATCH 06/13] irq: add a helper spread an affinity mask for  MSI/MSI-X vectors "Guilherme G. Piccoli" <gpiccoli@linux.vnet.ibm.com> - 2016-06-15 15:10 +0200
          Re: [PATCH 06/13] irq: add a helper spread an affinity mask for  MSI/MSI-X vectors Christoph Hellwig <hch@lst.de> - 2016-06-16 17:20 +0200
  [PATCH 07/13] pci: Provide sensible irq vector alloc/free routines Christoph Hellwig <hch@lst.de> - 2016-06-14 22:00 +0200
    Re: [PATCH 07/13] pci: Provide sensible irq vector alloc/free  routines Alexander Gordeev <agordeev@redhat.com> - 2016-06-23 13:20 +0200
  [PATCH 02/13] irq: Introduce IRQD_AFFINITY_MANAGED flag Christoph Hellwig <hch@lst.de> - 2016-06-14 22:00 +0200
    Re: [PATCH 02/13] irq: Introduce IRQD_AFFINITY_MANAGED flag Christoph Hellwig <hch@lst.de> - 2016-06-15 12:30 +0200
      Re: [PATCH 02/13] irq: Introduce IRQD_AFFINITY_MANAGED flag Keith Busch <keith.busch@intel.com> - 2016-06-15 17:10 +0200
        Re: [PATCH 02/13] irq: Introduce IRQD_AFFINITY_MANAGED flag Keith Busch <keith.busch@intel.com> - 2016-06-15 18:00 +0200
          Re: [PATCH 02/13] irq: Introduce IRQD_AFFINITY_MANAGED flag Keith Busch <keith.busch@intel.com> - 2016-06-15 22:00 +0200
            Re: [PATCH 02/13] irq: Introduce IRQD_AFFINITY_MANAGED flag Keith Busch <keith.busch@intel.com> - 2016-06-15 22:10 +0200
              Re: [PATCH 02/13] irq: Introduce IRQD_AFFINITY_MANAGED flag Keith Busch <keith.busch@intel.com> - 2016-06-16 17:20 +0200
                Re: [PATCH 02/13] irq: Introduce IRQD_AFFINITY_MANAGED flag Alexander Gordeev <agordeev@redhat.com> - 2016-06-22 14:00 +0200
          Re: [PATCH 02/13] irq: Introduce IRQD_AFFINITY_MANAGED flag Christoph Hellwig <hch@lst.de> - 2016-06-16 17:30 +0200
            Re: [PATCH 02/13] irq: Introduce IRQD_AFFINITY_MANAGED flag Christoph Hellwig <hch@lst.de> - 2016-06-20 14:30 +0200
              Re: [PATCH 02/13] irq: Introduce IRQD_AFFINITY_MANAGED flag Christoph Hellwig <hch@lst.de> - 2016-06-21 16:40 +0200
  [PATCH 01/13] irq/msi: Remove unused MSI_FLAG_IDENTITY_MAP Christoph Hellwig <hch@lst.de> - 2016-06-14 22:00 +0200
  [PATCH 09/13] blk-mq: don't redistribute hardware queues on a CPU hotplug event Christoph Hellwig <hch@lst.de> - 2016-06-14 22:10 +0200
  [PATCH 13/13] nvme: remove the post_scan callout Christoph Hellwig <hch@lst.de> - 2016-06-14 22:10 +0200
  [PATCH 08/13] pci: spread interrupt vectors in pci_alloc_irq_vectors Christoph Hellwig <hch@lst.de> - 2016-06-14 22:10 +0200
  [PATCH 05/13] irq/msi: Make use of affinity aware allocations Christoph Hellwig <hch@lst.de> - 2016-06-14 22:10 +0200
  [PATCH 12/13] nvme: switch to use pci_alloc_irq_vectors Christoph Hellwig <hch@lst.de> - 2016-06-14 22:10 +0200
  [PATCH 04/13] irq: Use affinity hint in irqdesc allocation Christoph Hellwig <hch@lst.de> - 2016-06-14 22:10 +0200
  Re: automatic interrupt affinity for MSI/MSI-X capable devices V2 Christoph Hellwig <hch@lst.de> - 2016-06-16 17:30 +0200

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