[PATCH 0/5] genirq/affinity: introduce .setup_affinity to support allocating interrupt sets

From: Ming Lei <ming.lei@redhat.com>
To: Christoph Hellwig <hch@lst.de>,
	Bjorn Helgaas <helgaas@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>
Cc: Jens Axboe <axboe@kernel.dk>,
	linux-block@vger.kernel.org, Sagi Grimberg <sagi@grimberg.me>,
	linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org,
	linux-pci@vger.kernel.org, Ming Lei <ming.lei@redhat.com>
Subject: [PATCH 0/5] genirq/affinity: introduce .setup_affinity to support allocating interrupt sets
Date: Fri, 25 Jan 2019 17:53:42 +0800	[thread overview]
Message-ID: <20190125095347.17950-1-ming.lei@redhat.com> (raw)

Hi,

The current support for allocating interrupt sets requires that same 'max_vec'
and 'min_vec' is passed to pci_alloc_irq_vectors_affinity(), then driver has to
try to allocate again and again until it succeeds.

This patch introduces .setup_affinity callback, and we can use it to
re-caculate interrupt sets and build affinity for each set after
irq vectors are allocated.

Turns out both genirq/affinity and nvme code get simplified a lot.

Please review and comment!

Ming Lei (5):
  genirq/affinity: move allocation of 'node_to_cpumask' to
    irq_build_affinity_masks
  genirq/affinity: allow driver to setup managed IRQ's affinity
  genirq/affinity: introduce irq_build_affinity()
  nvme-pci: simplify nvme_setup_irqs() via .setup_affinity callback
  genirq/affinity: remove support for allocating interrupt sets

 drivers/nvme/host/pci.c   |  97 +++++++++++++++++++++--------------------
 drivers/pci/msi.c         |  14 ------
 include/linux/interrupt.h |  42 ++++++++++++------
 kernel/irq/affinity.c     | 108 ++++++++++++++++++++++++----------------------
 4 files changed, 133 insertions(+), 128 deletions(-)

-- 
2.9.5