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| author | Ingo Molnar <mingo@elte.hu> | 2011-05-27 12:38:52 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-05-28 17:41:05 +0200 |
| commit | 29f742f88a32c9ab8cf6d9ba69e1ea918be5aa58 (patch) | |
| tree | a38aa38c8025e050ec82a7e64d02dca07f90ffc7 /Documentation | |
| parent | Documentation: Add statistics about nested locks (diff) | |
| parent | rcu: Decrease memory-barrier usage based on semi-formal proof (diff) | |
| download | linux-29f742f88a32c9ab8cf6d9ba69e1ea918be5aa58.tar.xz linux-29f742f88a32c9ab8cf6d9ba69e1ea918be5aa58.zip | |
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.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. |