Well, if UMA is going to eventually remove kmem_map and
just use kernel_map (or vise-versa), then the issue comes
down to why kernel_map->lock is lockmgr lock in the
first place, instead of a mutex.
I think the reason is historical. Basically kernel_map was
originally a
Started looking at making malloc mpsafe.
First issue I came across was this brokenish code in
uma_core.c:page_alloc():
if (lockstatus(&kernel_map->lock, NULL)) {
*pflag = UMA_SLAB_KMEM;
p = (void *) kmem_malloc(kmem_map, bytes, wait);
} else {
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