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author | Ingo Molnar <mingo@kernel.org> | 2018-05-16 09:34:51 +0200 |
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committer | Ingo Molnar <mingo@kernel.org> | 2018-05-16 09:34:51 +0200 |
commit | 13a553199fa9327f957ba5e8462705ed250a9e6a (patch) | |
tree | 34de51e3233394d26cf03417a4ee7e113758a667 /include/trace | |
parent | 67b8d5c7081221efa252e111cd52532ec6d4266f (diff) | |
parent | 22df7316ac71dc1ac57415349938737d2a229c59 (diff) | |
download | linux-stable-13a553199fa9327f957ba5e8462705ed250a9e6a.tar.gz linux-stable-13a553199fa9327f957ba5e8462705ed250a9e6a.tar.bz2 linux-stable-13a553199fa9327f957ba5e8462705ed250a9e6a.zip |
Merge branch 'for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu
- Updates to the handling of expedited grace periods, perhaps most
notably parallelizing their initialization. Other changes
include fixes from Boqun Feng.
- Miscellaneous fixes. These include an nvme fix from Nitzan Carmi
that I am carrying because it depends on a new SRCU function
cleanup_srcu_struct_quiesced(). This branch also includes fixes
from Byungchul Park and Yury Norov.
- Updates to reduce lock contention in the rcu_node combining tree.
These are in preparation for the consolidation of RCU-bh,
RCU-preempt, and RCU-sched into a single flavor, which was
requested by Linus Torvalds in response to a security flaw
whose root cause included confusion between the multiple flavors
of RCU.
- Torture-test updates that save their users some time and effort.
Conflicts:
drivers/nvme/host/core.c
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/trace')
-rw-r--r-- | include/trace/events/rcu.h | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/include/trace/events/rcu.h b/include/trace/events/rcu.h index d8c33298c153..5936aac357ab 100644 --- a/include/trace/events/rcu.h +++ b/include/trace/events/rcu.h @@ -84,20 +84,21 @@ TRACE_EVENT(rcu_grace_period, ); /* - * Tracepoint for future grace-period events, including those for no-callbacks - * CPUs. The caller should pull the data from the rcu_node structure, - * other than rcuname, which comes from the rcu_state structure, and event, - * which is one of the following: + * Tracepoint for future grace-period events. The caller should pull + * the data from the rcu_node structure, other than rcuname, which comes + * from the rcu_state structure, and event, which is one of the following: * - * "Startleaf": Request a nocb grace period based on leaf-node data. + * "Startleaf": Request a grace period based on leaf-node data. + * "Prestarted": Someone beat us to the request * "Startedleaf": Leaf-node start proved sufficient. * "Startedleafroot": Leaf-node start proved sufficient after checking root. * "Startedroot": Requested a nocb grace period based on root-node data. + * "NoGPkthread": The RCU grace-period kthread has not yet started. * "StartWait": Start waiting for the requested grace period. * "ResumeWait": Resume waiting after signal. * "EndWait": Complete wait. * "Cleanup": Clean up rcu_node structure after previous GP. - * "CleanupMore": Clean up, and another no-CB GP is needed. + * "CleanupMore": Clean up, and another GP is needed. */ TRACE_EVENT(rcu_future_grace_period, |