[Bug 227116] CURRENT doesn't boot with integer divide fault in uma_startup_count

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=227116

            Bug ID: 227116
           Summary: CURRENT doesn't boot with integer divide fault in
                    uma_startup_count
           Product: Base System
           Version: CURRENT
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: daniel at octaforge.org
                CC: jeff at FreeBSD.org

Created attachment 191980
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=191980&action=edit
backtrace

Hello,

trying to boot a recent 12-CURRENT snapshot memstick image results in kernel
panic. The system is actually HardenedBSD, but the affected code suggests it's
not relevant to HBSD-related changes. Attached are pictures with a backtrace;
sadly I can't save a dump because it's an installer image. The pictured
snapshot is from March 21, I tried a recent one from today as well.

This is on 2x Xeon E5-2683v3, so it's a NUMA configuration. The kernel in
question has NUMA off and is effectively equivalent to GENERIC mins old FreeBSD
compat and plus hardening.

I can possibly try later on a vanilla FreeBSD -CURRENT snapshot and see if I
can reproduce it there as well.

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