[Bug 213155] possible kernel regression when running 11.x-RELEASE on KVM on AMD Opterons

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=213155

mainland at apeiron.net changed:

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                 CC|                            |mainland at apeiron.net

--- Comment #26 from mainland at apeiron.net ---
Created attachment 191361
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=191361&action=edit
Kernel patch to fix regression.

I've bisected the kernel regression and tracked it to r297857:

https://svnweb.freebsd.org/base?view=revision&revision=297857

I've also attached a patch that "fixes" the regression. I'm sure this isn't the
proper fix, but at least now I can upgrade from FreeBSD 10.3.

With this patch, the 10.4 kernel now boots just fine (it did not before). I am
currently building the 11.1 release from source with this patch and will report
back when done.

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