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authorIngo Molnar <mingo@elte.hu>2011-05-27 12:38:52 +0200
committerIngo Molnar <mingo@elte.hu>2011-05-28 17:41:05 +0200
commit29f742f88a32c9ab8cf6d9ba69e1ea918be5aa58 (patch)
treea38aa38c8025e050ec82a7e64d02dca07f90ffc7 /Documentation
parentf62508f68d04adefc4cf9b0177ba02c8818b3eec (diff)
parent23b5c8fa01b723c70a20d6e4ef4ff54c7656d6e1 (diff)
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Merge branch 'rcu/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-2.6-rcu into core/urgent
Diffstat (limited to 'Documentation')
-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
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.