Messages in this thread |  | | | Date | Tue, 30 Jun 2009 23:27:57 +0100 (BST) | | From | "Maciej W. Rozycki" <> | | Subject | Re: [PATCH] x86: sysctl to allow panic on IOCK NMI error |
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On Wed, 24 Jun 2009, Greg KH wrote:
> This patch introduces a sysctl /proc/sys/kernel/panic_on_io_nmi, which > defaults to 0 (off). > > When enabled, the kernel panics when the kernel receives an NMI caused > by an IO error. > > The IO error triggered NMI indicates a serious system condition, which > could result in IO data corruption. Rather than contiuing, panicing and > dumping might be a better choice, so one can figure out what's causing > the IO error. > > This could be especially important to companies running IO intensive > applications where corruption must be avoided, e.g. a banks databases.
These days an IOCK NMI typically happens in response to a PCI SERR -- it may be useful to traverse PCI buses to find the offender and dump this information on this occasion too. The south bridge may have additional status too.
Maciej
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