On Wed, 31 Mar 2004, Malcolm Blaney wrote:

> Got it working! Turns out to be related to the timing code after all. I 
> narrowed it down to the function: mark_offset_tsc() in 
> arch/i386/kernel/timers/timer_tsc.c. I removed the call to it in 
> timer_interrupt() in time.c, and then usb didn't hang with fsbr on. It 
> even does transfers at a fast enough speed! I know this is a bit off 
> topic, but thought I should say that it doesn't look like a usb problem. 
> Still don't know why fsbr triggers it though.

That's good news.  All I can think of is that it might be related to the 
load FSBR puts on the PCI bus.

> I'm sure I'm breaking something else by doing this, so is there a place 
> to post this type of problem? One for the kernel mailing list?

I don't know of any place to try other than LKML.

> Thanks again for your help Alan.
> 
> Malcolm.

You're welcome.

Alan Stern



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