I am trying to port 2.6.12 to a 32 bit SOC (ATI Xilleon). The same
system is current running 2.4.29 with no problems.
I have an Intel Pro/100M Ethernet adapter on the PCI bus that I use to
mount the root file system via nfs. There is also an ohci usb adapter
on the bus.
My problem is that with my new 2.6.12 port the NFS is very slow. It
takes about 10 minutes to mount the root filesystem, run init and
finally run a shell on the serial port and present the shell prompt.
Running commands like 'ls' works but can take 15 seconds in a small
On the same hardware running 2.4.29 the system boots in 15 seconds and
there is no delay for the 'ls'.
One theory I have is that there is a problem in either the interrupt or
timer code somewhere. My evidence for this is that if I repeatedly plug
and unplug a usb memory device things run more quickly. I think the
interrupts from the USB may be kicking things into action.
Any pointers about where to look would be most appreciated.