On Wed, Dec 24, 2003 at 05:29:28PM -0700, Daniel Sheltraw wrote: > > > I noticed that or 2.4.20 kernel as presently configured is > > > using four IRQs for the USB system. This is causing me some > > > headaches. Can someone please tell me how to reduce this number > > > of IRQs to a minimal set for USB keyboard and mouse use only. > > > > The USB host controllers bind to a IRQ, not the USB drivers. What > > does > > /proc/interrupts show for your machine? And why is it causing you > > headaches? The USB host drivers should handle sharing irqs just > > fine. > > Thanks. The /proc/interrupts file shows that four different IRQs are > being used. If I build only one controllers driver into the kernel > should there be only one IRQ used?
No, it sounds like you have 4 USB pci controller devices. Is this correct? You should see them all by running 'lspci'. > The reason for the headache is that I am using the RTAI hard-real- > time patch and it does not easily allow for the sharing of normal > Linux interrupts with the RTAI allocated interrupts. I need to > free some IRQs since this nasty BIOS on my Dell machine does not > allow me to reserve IRQs as do most BIOSs. The only option I have > is to cut down on the number of IRQs used by the USB system. Nothing we can really do to the usb drivers, sorry. Try getting a better box :) Good luck, greg k-h ------------------------------------------------------- This SF.net email is sponsored by: IBM Linux Tutorials. Become an expert in LINUX or just sharpen your skills. Sign up for IBM's Free Linux Tutorials. Learn everything from the bash shell to sys admin. Click now! http://ads.osdn.com/?ad_id=1278&alloc_id=3371&op=click _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
