diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/RCU/trace.txt | 17 |
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 o "dt" is the current value of the dyntick counter that is incremented when entering or leaving dynticks idle state, either by the - scheduler or by irq. The number after the "/" is the interrupt - nesting depth when in dyntick-idle state, or one greater than - the interrupt-nesting depth otherwise. - - This field is displayed only for CONFIG_NO_HZ kernels. - -o "dn" is the current value of the dyntick counter that is incremented - when entering or leaving dynticks idle state via NMI. If both - the "dt" and "dn" values are even, then this CPU is in dynticks - idle mode and may be ignored by RCU. If either of these two - counters is odd, then RCU must be alert to the possibility of - an RCU read-side critical section running on this CPU. + scheduler or by irq. This number is even if the CPU is in + dyntick idle mode and odd otherwise. The number after the first + "/" is the interrupt nesting depth when in dyntick-idle state, + or one greater than the interrupt-nesting depth otherwise. + The number after the second "/" is the NMI nesting depth. This field is displayed only for CONFIG_NO_HZ kernels. |