From 885aceb259e9d7fbc8faab60e939823a6bfb78e3 Mon Sep 17 00:00:00 2001
From: glebius <glebius@FreeBSD.org>
Date: Fri, 21 Oct 2011 13:54:17 +0000
Subject: Note that it is still not possible to guard special kind of
 allocations, those that have special relationships with uma(9). Currently
 only mbuf clusters.

---
 share/man/man9/memguard.9 | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

(limited to 'share/man/man9')

diff --git a/share/man/man9/memguard.9 b/share/man/man9/memguard.9
index 5c17148..99ce7de 100644
--- a/share/man/man9/memguard.9
+++ b/share/man/man9/memguard.9
@@ -24,7 +24,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd October 12, 2011
+.Dd October 21, 2011
 .Dt MEMGUARD 9
 .Os
 .Sh NAME
@@ -204,3 +204,17 @@ Additions have been made by
 and
 .An Gleb Smirnoff Aq glebius@FreeBSD.org
 to both the implementation and the documentation.
+.Sh BUGS
+It is not possible to guard allocations that really expect theirselves to be
+allocated from
+.Xr uma 9 ,
+utilizing additional interfaces apart from
+.Fn uma_zalloc
+and
+.Fn uma_free ,
+for example
+.Fn uma_find_refcnt .
+For the moment of writing only
+.Xr mbuf 9
+cluster zones belong to that kind of allocations.
+Attempt to guard them would lead to kernel panic.
-- 
cgit v1.1