Collect all the (now equivalent) pmap_new_proc/pmap_dispose_proc/

pmap_swapin_proc/pmap_swapout_proc functions from the MD pmap code
and use a single equivalent MI version.  There are other cleanups
needed still.

While here, use the UMA zone hooks to keep a cache of preinitialized
proc structures handy, just like the thread system does.  This eliminates
one dependency on 'struct proc' being persistent even after being freed.
There are some comments about things that can be factored out into
ctor/dtor functions if it is worth it.  For now they are mostly just
doing statistics to get a feel of how it is working.

1 files changed, 10 insertions, 0 deletions

diff --git a/sys/kern/kern_thread.c b/sys/kern/kern_thread.c
index 751dd70..ee7a252 100644
--- a/sys/kern/kern_thread.c
+++ b/sys/kern/kern_thread.c
@@ -97,6 +97,16 @@ thread_ctor(void *mem, int size, void *arg)
 	    (unsigned)RANGEOF(struct thread, td_startzero, td_endzero));
 	td->td_state = TDS_NEW;
 	td->td_flags |= TDF_UNBOUND;
+#if 0
+	/*
+	 * Maybe move these here from process creation, but maybe not.   
+	 * Moving them here takes them away from their "natural" place
+	 * in the fork process.
+	 */
+	/* XXX td_contested does not appear to be initialized for threads! */
+	LIST_INIT(&td->td_contested);
+	callout_init(&td->td_slpcallout, 1);
+#endif
 	cached_threads--;	/* XXXSMP */
 	active_threads++;	/* XXXSMP */
 }