Please merge patch for kernel regression in FreeBSD re: AMD Family 15h CPUs

[bfeitell]

There is a kernel regression that has been identified and patched in FreeBSD that was causing the FreeBSD and PFSense kernel to not boot under KVM/QEMU in Linux on AMD Family 15h processors (Opteron G4 & G5).

Would it be possible to incorporate this patch into 2.4.3, or is it too late?

Here is the bug thread, with links to the patch and commit.

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

Cheers,
Bennett

[loos]

Fixed, please test the next snapshot.

Thanks.

[bfeitell]

Thank you!

I have upgraded to 2.4.3.a.20180314.0851, and the fix does not seem to be present yet.  I will keep an eye out for the next build, and update this thread accordingly once I can confirm it works.

[bfeitell]

Thank you once again!

I can now confirm that this fix works.  I am running in a KVM/QEMU VM on AMD A8 based host under CentOS7, and using Opteron_G5 as the CPU type for the guest OS.