diff options
Diffstat (limited to 'Documentation/RCU/stallwarn.txt')
| -rw-r--r-- | Documentation/RCU/stallwarn.txt | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/Documentation/RCU/stallwarn.txt b/Documentation/RCU/stallwarn.txt index f3e0625f4290..083d88cbc089 100644 --- a/Documentation/RCU/stallwarn.txt +++ b/Documentation/RCU/stallwarn.txt | |||
| @@ -114,12 +114,11 @@ o A hardware failure. This is quite unlikely, but has occurred | |||
| 114 | This resulted in a series of RCU CPU stall warnings, eventually | 114 | This resulted in a series of RCU CPU stall warnings, eventually |
| 115 | leading the realization that the CPU had failed. | 115 | leading the realization that the CPU had failed. |
| 116 | 116 | ||
| 117 | The RCU, RCU-sched, and RCU-bh implementations have CPU stall | 117 | The RCU, RCU-sched, and RCU-bh implementations have CPU stall warning. |
| 118 | warning. SRCU does not have its own CPU stall warnings, but its | 118 | SRCU does not have its own CPU stall warnings, but its calls to |
| 119 | calls to synchronize_sched() will result in RCU-sched detecting | 119 | synchronize_sched() will result in RCU-sched detecting RCU-sched-related |
| 120 | RCU-sched-related CPU stalls. Please note that RCU only detects | 120 | CPU stalls. Please note that RCU only detects CPU stalls when there is |
| 121 | CPU stalls when there is a grace period in progress. No grace period, | 121 | a grace period in progress. No grace period, no CPU stall warnings. |
| 122 | no CPU stall warnings. | ||
| 123 | 122 | ||
| 124 | To diagnose the cause of the stall, inspect the stack traces. | 123 | To diagnose the cause of the stall, inspect the stack traces. |
| 125 | The offending function will usually be near the top of the stack. | 124 | The offending function will usually be near the top of the stack. |