Harkema, G.A. wrote: > Hello, > > > > I' am having some problems with using the rtdm_irq_request() function. I > disabled my local APIC support in the kernel (2.6.17, xenomai 2.2.0). My > device (USB-HOST controller) shares his IRQ with the Ethernet > card(e1000). After calling rtdm_irq_request() my system hangs. I tried > to unload the e1000 module first and it seems to work fine. Can I share > non-realtime interrupts whit real-time interrupts. If yes, what went > wrong.
Nope you can't share. The e1000 driver could otherwise cause priority inversions when an Ethernet-related IRQ is pending, the IRQ line will get disabled therefore, and thus succeeding RT-USB-originated IRQs will be shadowed until Linux gets a chance to run again. That the system hangs is due to the ungraceful way we currently handle such exceptions. [EMAIL PROTECTED]: This is one example of the frequent problems I was referring to...] Jan
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