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-rw-r--r--psutil/_pslinux.py4
1 files changed, 2 insertions, 2 deletions
diff --git a/psutil/_pslinux.py b/psutil/_pslinux.py
index 6c58cf2c..bf815e87 100644
--- a/psutil/_pslinux.py
+++ b/psutil/_pslinux.py
@@ -1988,8 +1988,8 @@ class Process(object):
def ionice_set(self, ioclass, value):
if value is None:
value = 0
- if value and ioclass == IOPRIO_CLASS_IDLE:
- raise ValueError("IOPRIO_CLASS_IDLE accepts no value")
+ if value and ioclass in (IOPRIO_CLASS_IDLE, IOPRIO_CLASS_NONE):
+ raise ValueError("%r ioclass accepts no value" % ioclass)
if value < 0 or value > 7:
raise ValueError("value not in 0-7 range")
return cext.proc_ioprio_set(self.pid, ioclass, value)