diff options
Diffstat (limited to 'Documentation/RCU/stallwarn.txt')
| -rw-r--r-- | Documentation/RCU/stallwarn.txt | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/Documentation/RCU/stallwarn.txt b/Documentation/RCU/stallwarn.txt index 073dbc12d1ea..1ab70c37921f 100644 --- a/Documentation/RCU/stallwarn.txt +++ b/Documentation/RCU/stallwarn.txt @@ -219,17 +219,18 @@ an estimate of the total number of RCU callbacks queued across all CPUs In kernels with CONFIG_RCU_FAST_NO_HZ, more information is printed for each CPU: - 0: (64628 ticks this GP) idle=dd5/3fffffffffffffff/0 softirq=82/543 last_accelerate: a345/d342 nonlazy_posted: 25 .D + 0: (64628 ticks this GP) idle=dd5/3fffffffffffffff/0 softirq=82/543 last_accelerate: a345/d342 Nonlazy posted: ..D The "last_accelerate:" prints the low-order 16 bits (in hex) of the jiffies counter when this CPU last invoked rcu_try_advance_all_cbs() from rcu_needs_cpu() or last invoked rcu_accelerate_cbs() from -rcu_prepare_for_idle(). The "nonlazy_posted:" prints the number -of non-lazy callbacks posted since the last call to rcu_needs_cpu(). -Finally, an "L" indicates that there are currently no non-lazy callbacks -("." is printed otherwise, as shown above) and "D" indicates that -dyntick-idle processing is enabled ("." is printed otherwise, for example, -if disabled via the "nohz=" kernel boot parameter). +rcu_prepare_for_idle(). The "Nonlazy posted:" indicates lazy-callback +status, so that an "l" indicates that all callbacks were lazy at the start +of the last idle period and an "L" indicates that there are currently +no non-lazy callbacks (in both cases, "." is printed otherwise, as +shown above) and "D" indicates that dyntick-idle processing is enabled +("." is printed otherwise, for example, if disabled via the "nohz=" +kernel boot parameter). If the grace period ends just as the stall warning starts printing, there will be a spurious stall-warning message, which will include |