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SubjectRe: 2.6.24-rt1 IRQ routing anomaly
Steven Rostedt wrote:
> On Sun, 2 Mar 2008, Jon Masters wrote:
>> On Thu, 2008-02-21 at 10:08 -0500, Steven Rostedt wrote:
>>> On Thu, 21 Feb 2008, Mark Hounschell wrote:
>>>>> To prove this is the problem, boot with noapic in the kernel command line.
>>>>> 1) the problem should disappear.
>>>>> 2) (I'm betting) you see that the eth and EMU10K1 share the same
>>>>> interrupt line.
>>>> Yep, you were right. They do share the same IRQ and the problem does go away.
>>>> Unfortunately I can't run this machine with noapic. I need irq affinity.
>>> Thanks for verifying. OK, I'll see if I can get the workaround on i386.
>> What's the situation with this one? Want me to look at it?
> Jon,
> The board Mark has may just be some cheap hardware. It would be great
> that RT would work on all boxes, but I'm not sure we want to spend time on
> "broken-by-design" hardware while there's bigger fish in the sea to catch.
> The current workaround is just use noapic, although I do understand
> that's not good enough for Mark. But I'm sure Mark has other hardware
> he could use ;-)
> -- Steve
Steve is correct. I have plenty of other choices. Steve, you mentioned, a "work around"
is in -rt3. My only concern is does the current "work around" for other hardware really
work or may I see this again with other "non cheap" hardware?

Is there a known list of hardware this problem is seen on?


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