Messages in this thread | | | Date | Wed, 03 May 2006 16:22:30 -0600 | From | "Doug Thompson" <> | Subject | Re: Problems with EDAC coexisting with BIOS |
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>>> 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
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