Re: [Xen-devel] [PATCH 2/2] x86/crash: Disable the watchdog NMIs on the crashing cpu.

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Fri, 2013-11-15 at 20:32 +0000, Andrew Cooper wrote:
> PVOps Linux as a kexec image shoots itself in the foot otherwise.
> 
> On a Core2 system, Linux declares a firmware bug and tries to invert some bits
> in the performance counter register.  It ends up setting the number of retired
> instructions to generate another NMI to fewer instructions than the NMI
> interrupt path itself, and ceases to make any useful progress.
> 
> While this is not strictly Xen's fault, Xen can at least be kind and leave the
> kexec environment with fewer issues to deal with.
> 
> From: David Vrabel <david.vrabel@xxxxxxxxxx>

This belongs in the first line, such that git am will DTRT. If you "git
commit --author 'David Vrabel <...>' then git send-email does TRT for
you.

Ian.


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