This series is against tip's x86/apic branch. Allow conserving interrupt resources when PCI devices in multiple-MSI mode send a number of MSIs which is not a power-of-two. This update will prevent wasting of any resources associated with unused MSIs in general (i.e. IRQ descriptors) and x86 interrupt vectors in particular (the latter are notoriously scarce). Recently PLX Technology confirmed they do have a relevant hardware, i.e. their new PEX8796 chip can send 18 MSIs. Changes from v2: - patch 2/2 changelog message elaborated Changes from v1: - do not conserve on IRTEs to prevent possible security hole when one device accesses other device's IRTEs Patch 1 is a change to the generic MSI code Patch 2 is the x86 enablement Alexander Gordeev (2): PCI/MSI: Allocate as many multiple-MSIs as requested x86/MSI: Conserve interrupt resources when using multiple-MSIs drivers/iommu/irq_remapping.c | 12 +++++++----- drivers/pci/msi.c | 10 ++++++++-- include/linux/msi.h | 1 + 3 files changed, 16 insertions(+), 7 deletions(-) -- 1.7.7.6 -- Regards, Alexander Gordeev agordeev@xxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
