Date: Tue, 4 Sep 2001 14:49:11 -0700 From: Murray Stokely <murray@FreeBSD.org> To: freebsd-doc@FreeBSD.org Subject: Diff to zone.9 Message-ID: <20010904144911.P3246@windriver.com>
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Does this diff look correct? des reviewed the content so if the mdoc
is ok I'd like to commit this and close docs/26006.
- Murray
Index: zone.9
===================================================================
RCS file: /home/ncvs/src/share/man/man9/zone.9,v
retrieving revision 1.5
diff -u -r1.5 zone.9
--- zone.9 2001/08/10 10:53:10 1.5
+++ zone.9 2001/09/04 21:41:52
@@ -63,18 +63,18 @@
aren't, and provides functions for allocating items from the zone and
for releasing them back (which makes them available for later use).
.Pp
-The zone allocator stores state information inside the items proper,
-so structures that will be managed by the zone allocator must reserve
-two pointers at the very beginning for internal use by the zone
-allocator, as follows:
-.Bd -literal
-struct my_item {
- struct my_item *z_rsvd1;
- struct my_item *z_rsvd2;
- /* rest of structure */
-};
-.Ed
+While an item is not in use, the first sizeof(void *) bytes are used
+for a pointer to another available item.
+When allocated, all of the item's space is available, except with
+.Dv INVARIANTS
+defined, where the second sizeof(void *) bytes are used for sanity
+checks, and we would get a panic trying to free the item if those
bytes
+were somehow changed to
+.Dv ZENTRY_FREE .
.Pp
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