Messages in this thread | | | From | Christoph Hellwig <> | Subject | pci: automatic interrupt affinity for MSI/MSI-X capable devices V2 | Date | Tue, 12 Jul 2016 18:20:13 +0900 |
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This series adds a new set of functions that transparently use the right type of interrupt (MSI-X, MSI, legacy interrupt line) for a PCI device, and if multiple vectors are supported automatically spreads the irq routing to different CPUs. This will allow the block layer (and hopefully other consumers in the future) to use this information for mapping queues to fit the interrupt affinity.
For the last patche to work you need to merge the irq/for-block branch of
https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
first.
There also is a git tree available at:
git://git.infradead.org/users/hch/block.git pci-irq-spreading
Gitweb:
http://git.infradead.org/users/hch/block.git/shortlog/refs/heads/pci-irq-spreading
Changes since V1 - change return values for the minmum vector check - improve the documentation
Changes since automatic interrupt affinity for MSI/MSI-X capable devices V3: - add PCI_IRQ_NOLEGACY flag - various error code fixes - reuse the pci_enable_msi(x)_range code instead of duplicating it - don't allocate msix_entry structures for the MSI-X case
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