On Thu, 2008-04-24 at 21:48 +0200, Richard Jonsson wrote:
> Hello,
> 
> First some background:
> I am currently running latest mainline from git. This kernel suffers 
> from a scheduler?

I think this question is more suited for LKML.

> While trying to find what these hickups come from I ran watch --interval 
> .1 "cat /proc/interrupts". I can see there that the b43 disappears, gets 
> unloaded probably, and then reappears.

You should probably show the exact contents of /proc/interrupts and
provide some details about the systems (architecture, CPU speed,
contents of /proc/sched_debug, lspci output, dmesg output).

> When b43 reappears in the interrupt listing, that line generates some 
> 25000 irq's within a fraction of a second. Is this a bug somewhere or by 
> design?

It's possible that the interrupt count is not shown when the driver
"disappears", but is not reset to 0.  Once the interrupt has a handler,
the original count is shown.

> Note that I wouldn't ever see this if the kernel was behaving as normal. 
> I have no idea if the b43 driver has always behaved like this. I could 
> of course test an older kernel on request.

That's probably a good idea, as the LKML folks would suspect something
they know least about, i.e. the hardware.

-- 
Regards,
Pavel Roskin
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