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



  • 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


  • Netgate

    Fixed, please test the next snapshot.

    Thanks.



  • 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.



  • 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.

    ![Screen Shot 2018-03-14 at 7.05.01 PM.png](/public/imported_attachments/1/Screen Shot 2018-03-14 at 7.05.01 PM.png)
    ![Screen Shot 2018-03-14 at 7.05.01 PM.png_thumb](/public/imported_attachments/1/Screen Shot 2018-03-14 at 7.05.01 PM.png_thumb)
    ![Screen Shot 2018-03-14 at 7.09.58 PM.png](/public/imported_attachments/1/Screen Shot 2018-03-14 at 7.09.58 PM.png)
    ![Screen Shot 2018-03-14 at 7.09.58 PM.png_thumb](/public/imported_attachments/1/Screen Shot 2018-03-14 at 7.09.58 PM.png_thumb)


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