Messages in this thread | | | Date | Fri, 4 Jun 2010 12:16:39 +0200 | From | Andi Kleen <> | Subject | Re: [PATCH 0/5] kdump: extract log buffer and registers from vmcore on NMI button pressing |
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On Fri, Jun 04, 2010 at 05:49:36PM +0800, Américo Wang wrote: > On Thu, Jun 03, 2010 at 05:13:47PM +0200, Andi Kleen wrote: > >> > NMI would be only needed if the crash kernel is completely > >> > hosed too. > >> > >> That's the case. > > > >You're saying it booted but is hosed after boot? > > > >That seems like a very obscure case. Is that really common? > > > > Actually, I met two of this kind of cases recently. > > One was stucked in early_idt_hander() during booting the second kernel,
Most likely screaming interrupt from some device.
I have some ideas how to improve this by more forcefully resetting devices on kexec, but in general perhaps early idt needs to be hardened for this case too.
-Andi
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