Re: Problems with EDAC coexisting with BIOS

Doug Thompson
2006-05-03T22:22:42Z

>>> Alan Cox <alan@lxorguk.ukuu.org.uk> 05/03/06 3:44 PM >>>
On Mer, 2006-05-03 at 21:25 +0100, Tim Small wrote:
>> something with NMI-signalled errors, I was wondering what the
problems
>> with using NMI-signalled ECC errors were?

>The big problem with NMI is that it can occur *during* a PCI
>configuration sequence (ie during pci_config_* functions). That means
we
>can't safely do some I/O, especially configuration space I/O in an NMI
>handler. At best we could set a flag and catch it afterwards.

Dave Peterson did submit a set of patches to provide a deferred calling
mechanism triggered by the NMI handler. I am in the process of reading
up on that patch. It currently is in the bluesmoke project.

doug t