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| author | Paul E. McKenney <paulmck@kernel.org> | 2020-11-06 13:52:31 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2021-01-04 13:54:40 -0800 |
| commit | b08ea1de6a8f8929c7dafd6f708799365fa90c11 (patch) | |
| tree | b37a04f865ec0c76e44dd844e13f1ec95548e7f1 /kernel/rcu/tree_exp.h | |
| parent | 5c8fe583cce542aa0b84adc939ce85293de36e5e (diff) | |
| download | linux-stable-b08ea1de6a8f8929c7dafd6f708799365fa90c11.tar.gz linux-stable-b08ea1de6a8f8929c7dafd6f708799365fa90c11.tar.bz2 linux-stable-b08ea1de6a8f8929c7dafd6f708799365fa90c11.zip | |
rcu: Mark obtuse portion of stall warning as internal debug
There is a rather obtuse string that can be printed as part of an
expedited RCU CPU stall-warning message that starts with "blocking
rcu_node structures". Under normal conditions, most of this message
is just repeating the list of CPUs blocking the current expedited grace
period, but in a manner that is rather difficult to read. This commit
therefore marks this message as "(internal RCU debug)" in an effort to
give people the option of avoiding wasting time attempting to extract
nonexistent additional meaning from this portion of the message.
Reported-by: Jonathan Lemon <bsd@fb.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/rcu/tree_exp.h')
| -rw-r--r-- | kernel/rcu/tree_exp.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/rcu/tree_exp.h b/kernel/rcu/tree_exp.h index 8760b6ead770..6c6ff06d4ae6 100644 --- a/kernel/rcu/tree_exp.h +++ b/kernel/rcu/tree_exp.h @@ -545,7 +545,7 @@ static void synchronize_rcu_expedited_wait(void) data_race(rnp_root->expmask), ".T"[!!data_race(rnp_root->exp_tasks)]); if (ndetected) { - pr_err("blocking rcu_node structures:"); + pr_err("blocking rcu_node structures (internal RCU debug):"); rcu_for_each_node_breadth_first(rnp) { if (rnp == rnp_root) continue; /* printed unconditionally */ |