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-rw-r--r--doc/user/region.t3
1 files changed, 3 insertions, 0 deletions
diff --git a/doc/user/region.t b/doc/user/region.t
index 3858de52e0..aa68badb16 100644
--- a/doc/user/region.t
+++ b/doc/user/region.t
@@ -592,6 +592,9 @@ are defined by RTEMS:
@item @code{NO_WAIT} - task should not wait
@end itemize
+A clock tick is required to support the timeout functionality of
+this directive.
+
@page
@ifinfo
@node REGION_RETURN_SEGMENT - Return segment to a region, REGION_GET_SEGMENT_SIZE - Obtain size of a segment, REGION_GET_SEGMENT - Get segment from a region, Region Manager Directives