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-rw-r--r--Documentation/RCU/trace.txt17
1 files changed, 5 insertions, 12 deletions
diff --git a/Documentation/RCU/trace.txt b/Documentation/RCU/trace.txt
index c078ad48f7a1..8173cec473aa 100644
--- a/Documentation/RCU/trace.txt
+++ b/Documentation/RCU/trace.txt
@@ -99,18 +99,11 @@ o "qp" indicates that RCU still expects a quiescent state from
99 99
100o "dt" is the current value of the dyntick counter that is incremented 100o "dt" is the current value of the dyntick counter that is incremented
101 when entering or leaving dynticks idle state, either by the 101 when entering or leaving dynticks idle state, either by the
102 scheduler or by irq. The number after the "/" is the interrupt 102 scheduler or by irq. This number is even if the CPU is in
103 nesting depth when in dyntick-idle state, or one greater than 103 dyntick idle mode and odd otherwise. The number after the first
104 the interrupt-nesting depth otherwise. 104 "/" is the interrupt nesting depth when in dyntick-idle state,
105 105 or one greater than the interrupt-nesting depth otherwise.
106 This field is displayed only for CONFIG_NO_HZ kernels. 106 The number after the second "/" is the NMI nesting depth.
107
108o "dn" is the current value of the dyntick counter that is incremented
109 when entering or leaving dynticks idle state via NMI. If both
110 the "dt" and "dn" values are even, then this CPU is in dynticks
111 idle mode and may be ignored by RCU. If either of these two
112 counters is odd, then RCU must be alert to the possibility of
113 an RCU read-side critical section running on this CPU.
114 107
115 This field is displayed only for CONFIG_NO_HZ kernels. 108 This field is displayed only for CONFIG_NO_HZ kernels.
116 109