On Thu, Sep 22, 2011 at 06:57:06AM -0400, Neil Horman wrote: > On Thu, Sep 22, 2011 at 06:49:02AM -0400, Konrad Rzeszutek Wilk wrote: > > On Mon, Sep 19, 2011 at 11:47:15AM -0400, Neil Horman wrote: > > > So a while back, I wanted to provide a way for irqbalance (and other apps) to > > > definitively map irqs to devices, which, for msi[x] irqs is currently not really > > > possible in user space. My first attempt wen't not so well: > > > https://lkml.org/lkml/2011/4/21/308 > > > > > > It was plauged by the same issues that prior attempts were, namely that it > > > violated the one-file-one-value sysfs rule. I wandered off but have recently > > > come back to this. I've got a new implementation here that exports a new > > > subdirectory for every pci device, called msi_irqs. This subdirectory contanis > > > a variable number of numbered subdirectories, in which the number represents an > > > msi irq. Each numbered subdirectory contains attributes for that irq, which > > > currently is only the mode it is operating in (msi vs. msix). I think fits > > > within the constraints sysfs requires, and will allow irqbalance to properly map > > > msi irqs to devices without having to rely on rickety, best guess methods like > > > interface name matching. > > > > Are there irqbalance patches that correspond to this? Where would they be available? > > > I've got them here locally, shemminger and I are testing them out, when I'm comfortable with > them, I'll be comitting them to the public repository at code.google.com Right.. asking b/c it might be a good idea to include that in the git description of the patch. BTW, I also had some question on the patch itself - not sure if you had a chance to read them. > > Note, the changes to support this kernel update in irqbalance is also comming > with a major gutting that I'm doing of the daemon. Things like making workload > bias adjustments based on packets received per interface, since theres no > guaranteed 1:1 correlation between network interfaces and irqs. The point being > that while irq identification will definately be fixed, you might notice other > behavioral differences that we may or may not want to address. Bug reports > would be greatly appreciated at the project site. > > Thanks! > Neil -- 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
