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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2018-05-15 16:23:23 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2018-07-12 15:39:10 -0700 |
| commit | f2e2df59786d7bd52e6e7e2d10c1c6ba433a0ee7 (patch) | |
| tree | 83228ad0b1384cdb37e5be871f21f9d1cbababc8 /kernel/rcu/tree.h | |
| parent | fea3f222d3523dfdd0e86b11227d3cda20765102 (diff) | |
| download | linux-stable-f2e2df59786d7bd52e6e7e2d10c1c6ba433a0ee7.tar.gz linux-stable-f2e2df59786d7bd52e6e7e2d10c1c6ba433a0ee7.tar.bz2 linux-stable-f2e2df59786d7bd52e6e7e2d10c1c6ba433a0ee7.zip | |
rcu: Add diagnostics for offline CPUs failing to report QS
CPUs are expected to report quiescent states when coming online and
when going offline, and grace-period initialization is supposed to
handle any race conditions where a CPU's ->qsmask bit is set just after
it goes offline. This commit adds diagnostics for the case where an
offline CPU nevertheless has a grace period waiting on it.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcu/tree.h')
| -rw-r--r-- | kernel/rcu/tree.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h index 8077aff7ab40..d51e6edc8e83 100644 --- a/kernel/rcu/tree.h +++ b/kernel/rcu/tree.h @@ -90,6 +90,7 @@ struct rcu_node { /* an rcu_data structure, otherwise, each */ /* bit corresponds to a child rcu_node */ /* structure. */ + unsigned long rcu_gp_init_mask; /* Mask of offline CPUs at GP init. */ unsigned long qsmaskinit; /* Per-GP initial value for qsmask. */ /* Initialized from ->qsmaskinitnext at the */ |