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-rw-r--r--share/man/man9/memguard.916
1 files changed, 15 insertions, 1 deletions
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.
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