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-rw-r--r--schedutils/ionice.13
1 files changed, 2 insertions, 1 deletions
diff --git a/schedutils/ionice.1 b/schedutils/ionice.1
index 92712eef3..0f75dfdfb 100644
--- a/schedutils/ionice.1
+++ b/schedutils/ionice.1
@@ -43,7 +43,8 @@ permitted for an ordinary (i.e., non-root) user.
.SH OPTIONS
.IP "\fB-c \fIclass\fP"
-The scheduling class. \fI1\fR for real time, \fI2\fR for best-effort, \fI3\fR for idle.
+The scheduling class. \fI0\fR for none, \fI1\fR for real time, \fI2\fR for
+best-effort, \fI3\fR for idle.
.IP "\fB-n \fIclassdata\fP"
The scheduling class data. This defines the class data, if the class
accepts an argument. For real time and best-effort, \fI0-7\fR is valid