Florin Andrei wrote:
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=62295What is the reason why IO-APIC is disabled in the RH kernels? I have a desktop system, optimized for heavy multimedia work, which has quite a few PCI controllers in it (IEEE1394, analog video capture, etc.) besides the usual stuff (network, video). The normal IRQ space is quite tight. Here's a sample of /proc/interrupts: Due to IRQ overlaps, the performance of the system is quite suboptimal, especially when devices using the same IRQ are working at the same time. Enabling IO-APIC makes room above IRQ 15, potentially eliminating those nasty interrupt overlaps. I've noticed that when using a vanilla 2.4.20 kernel with IO-APIC enabled. The system has an AthlonXP proc, and an nForce1 motherboard.
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