diff options
Diffstat (limited to 'Documentation/RCU/trace.txt')
| -rw-r--r-- | Documentation/RCU/trace.txt | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/Documentation/RCU/trace.txt b/Documentation/RCU/trace.txt index 40b530dd0fc7..fd4bffb6e8c9 100644 --- a/Documentation/RCU/trace.txt +++ b/Documentation/RCU/trace.txt @@ -159,8 +159,8 @@ o "qs" gives an indication of the state of the callback queue the corresponding character is replaced by ".". o "kt" is the per-CPU kernel-thread state. The digit preceding - the slash is zero if there is no work pending and 1 otherwise. - The character after the slash is as follows: + the first slash is zero if there is no work pending and 1 + otherwise. The character between the slashes is as follows: "S" The kernel thread is stopped, in other words, all CPUs corresponding to this rcu_node structure are @@ -171,10 +171,18 @@ o "kt" is the per-CPU kernel-thread state. The digit preceding "W" The kernel thread is waiting because there is no work for it to do. + "O" The kernel thread is waiting because it has been + forced off of its designated CPU or because its + ->cpus_allowed mask permits it to run on other than + its designated CPU. + "Y" The kernel thread is yielding to avoid hogging CPU. "?" Unknown value, indicates a bug. + The number after the final slash is the CPU that the kthread + is actually running on. + o "b" is the batch limit for this CPU. If more than this number of RCU callbacks is ready to invoke, then the remainder will be deferred. |