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From: Peter Wemm <peter@FreeBSD.org>
Subject: PERFORCE change 13780 for review
To: Perforce Change Reviews <perforce@freebsd.org>
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http://people.freebsd.org/~peter/p4db/chv.cgi?CH=13780

Change 13780 by peter@peter_ia64 on 2002/07/03 18:07:57

	Make this work on the Itanium2 box I have here.
	It tries to preallocate over 1 million entries here
	due to the (very) discontiguous memory map.  Note that
	we have some nasty problems elsewhere to deal with that
	assume that memory is approximately contiguous
	(ie: pages = (maxaddr - minaddr) / PAGE_SIZE; type bugs)

Affected files ...

.. //depot/projects/ia64/sys/ia64/ia64/pmap.c#26 edit

Differences ...

==== //depot/projects/ia64/sys/ia64/ia64/pmap.c#26 (text+ko) ====

@@ -133,7 +133,8 @@
 #define PMAP_DIAGNOSTIC
 #endif
 
-#define MINPV 2048
+#define MINPV 2048		/* Preallocate at least this many */
+#define MAXPV 20480		/* But no more than this */
 
 #if 0
 #define PMAP_DIAGNOSTIC
@@ -521,6 +522,8 @@
 	initial_pvs = vm_page_array_size;
 	if (initial_pvs < MINPV)
 		initial_pvs = MINPV;
+	if (initial_pvs > MAXPV)
+		initial_pvs = MAXPV;
 	pvzone = uma_zcreate("PV ENTRY", sizeof (struct pv_entry),
 	    NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_VM);
 	uma_zone_set_allocf(pvzone, pmap_allocf);

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