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тАО12-08-2010 10:50 AM
тАО12-08-2010 10:50 AM
Re: How does the kernel detect a bus check HPMC?
But after the second hardware replacement, we got to wondering about software causes, so I wanted to get a better handle on how things work down at this level so we can better characterize the problem.
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тАО12-08-2010 10:52 AM
тАО12-08-2010 10:52 AM
Re: How does the kernel detect a bus check HPMC?
http://bizsupport1.austin.hp.com/bc/docs/support/SupportManual/c02542174/c02542174.pdf
Rgds,
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тАО12-08-2010 10:56 AM
тАО12-08-2010 10:56 AM
Re: How does the kernel detect a bus check HPMC?
I've seen *many* HPMC crashes resolved with O/S patches, Drivers and Firmware so don't overlook these when troubleshooting BUS_CHECK HPMC issues.
Rgds,
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тАО12-08-2010 11:25 AM
тАО12-08-2010 11:25 AM
Re: How does the kernel detect a bus check HPMC?
----
( SR:8606287203 CR:JAGae51142 )
In some situations, the driver was posting an incorrect buffer address to the card causing a HPMC.
Resolution:
Driver has been modified to handle this case correctly.
----
So we'll start pulling on this thread and see where it leads us.
This description also helps me visualize how a driver could cause an HPMC, which I wasn't very clear on with all the emphasis on hardware.
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тАО12-08-2010 01:04 PM
тАО12-08-2010 01:04 PM
Re: How does the kernel detect a bus check HPMC?
it is possible, but if it reoccurs you'll probably need to have the crash dump analyzed.
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тАО12-08-2010 01:10 PM
тАО12-08-2010 01:10 PM
Re: How does the kernel detect a bus check HPMC?
Only the kernel can do this with privileged instructions.
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тАО12-08-2010 01:32 PM
тАО12-08-2010 01:32 PM
Re: How does the kernel detect a bus check HPMC?
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тАО01-26-2011 09:16 AM
тАО01-26-2011 09:16 AM
Re: How does the kernel detect a bus check HPMC?
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тАО01-26-2011 03:48 PM
тАО01-26-2011 03:48 PM
Re: How does the kernel detect a bus check HPMC?
are the panic stack all the same?
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тАО04-21-2011 09:58 AM
тАО04-21-2011 09:58 AM
Re: How does the kernel detect a bus check HPMC?
Per the PCI 2.1 spec, a card is not required to assert the device-selected pin to PCI bus address assertions outside its accepted range of registers, and the cards in question apparently don't.
We were able to reproduce the HPMC on Monday by poking the card's mapped IO memory in the wrong place.