On Thu, May 28, 2015 at 11:52 AM, David Miller <da...@davemloft.net> wrote: > From: Ben Hutchings <b...@decadent.org.uk> > Date: Wed, 27 May 2015 20:57:37 +0100 > >> How would an application tell the difference between an IRQ handler >> being renamed, or being unregistered and re-registered under a different >> name? I'm fairly sure it can't tell. > > What do things like the userland IRQ balancer do?
Thanks to Neil Horman, userland scripts can get the irq number from sysfs (/sys/bus/pci/devices/<device>/msi_irqs) which is not based on the irq naming [1]. He also fixed irq_balancer [2] to use this API instead of being based on those strings. I will drop the irq renaming from the patchset. mlx5_core driver will set generic irq names (since same irq's might service both Ethernet and Infiniband), for example: mlx5_comp0@pci:0000:00:04.0. Thanks, Amir [1] - kernel: da8d1c8 PCI/sysfs: add per pci device msi[x] irq listing (v5) [2] - irq_balancer: 32a7757 Complete rework of how we detect and classify irqs -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
