[Bug 233414] [PowerPC64] OPTIONS DEBUG_MEMGUARD results in unbootable kernel

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=233414

--- Comment #13 from Sean Bruno <sbruno at FreeBSD.org> ---
I'm guessing that memguard is making things too slow to catch whatever was
crashing before.  I have been running the memguard patch from comment #10 for 3
days without issue:

sbruno at pylon.nyi:~ % sysctl vm.memguard
vm.memguard.maplimit: 3435974656
vm.memguard.mapstart: 16140901064512782336
vm.memguard.divisor: 10
vm.memguard.desc: 16 Bucket
vm.memguard.cursor: 16140901067941314560
vm.memguard.mapsize: 3435974656
vm.memguard.phys_limit: 1641385984
vm.memguard.wasted: 2380800
vm.memguard.wrapcnt: 134780
vm.memguard.numalloc: 673191
vm.memguard.fail_kva: 105
vm.memguard.fail_pgs: 0
vm.memguard.options: 1
vm.memguard.minsize: 0
vm.memguard.minsize_reject: 0
vm.memguard.frequency: 0
vm.memguard.frequency_hits: 0
sbruno at pylon.nyi:~ % uptime
 8:07PM  up 3 days,  2:45, 2 users, load averages: 4.03, 5.05, 5.15

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