From: paulmck@kernel.org
To: rcu@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, kernel-team@fb.com,
mingo@kernel.org, jiangshanlai@gmail.com, dipankar@in.ibm.com,
akpm@linux-foundation.org, mathieu.desnoyers@efficios.com,
josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org,
rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com,
fweisbec@gmail.com, oleg@redhat.com, joel@joelfernandes.org,
"Paul E. McKenney" <paulmck@kernel.org>
Subject: [PATCH tip/core/rcu 07/24] nocb: Clarify RCU nocb CPU error message
Date: Mon, 31 Aug 2020 11:00:59 -0700 [thread overview]
Message-ID: <20200831180116.32690-7-paulmck@kernel.org> (raw)
In-Reply-To: <20200831180050.GA32590@paulmck-ThinkPad-P72>
From: "Paul E. McKenney" <paulmck@kernel.org>
A message of the form "rcu: !!! lDTs ." can be tracked down, but
doing so is not trivial. This commit therefore eases this process by
adding text so that this error message now reads as follows:
"rcu: nocb GP activity on CB-only CPU!!! lDTs ."
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
kernel/rcu/tree_plugin.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index 982fc5b..bbc0c07 100644
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -2417,7 +2417,7 @@ static void show_rcu_nocb_state(struct rcu_data *rdp)
!waslocked && !wastimer && !wassleep)
return; /* Nothing untowards. */
- pr_info(" !!! %c%c%c%c %c\n",
+ pr_info(" nocb GP activity on CB-only CPU!!! %c%c%c%c %c\n",
"lL"[waslocked],
"dD"[!!rdp->nocb_defer_wakeup],
"tT"[wastimer],
--
2.9.5
next prev parent reply other threads:[~2020-08-31 18:03 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-31 18:00 [PATCH tip/core/rcu 0/24] Miscellaneous fixes for v5.10 Paul E. McKenney
2020-08-31 18:00 ` [PATCH tip/core/rcu 01/24] rcu: Remove KCSAN stubs paulmck
2020-08-31 18:00 ` [PATCH tip/core/rcu 02/24] rcu: Remove KCSAN stubs from update.c paulmck
2020-08-31 18:00 ` [PATCH tip/core/rcu 03/24] srcu: Remove KCSAN stubs paulmck
2020-08-31 18:00 ` [PATCH tip/core/rcu 04/24] rcu: Initialize at declaration time in rcu_exp_handler() paulmck
2020-08-31 18:00 ` [PATCH tip/core/rcu 05/24] rcu/trace: Print negative GP numbers correctly paulmck
2020-08-31 18:00 ` [PATCH tip/core/rcu 06/24] rcu/trace: Use gp_seq_req in acceleration's rcu_grace_period tracepoint paulmck
2020-08-31 18:00 ` paulmck [this message]
2020-08-31 18:01 ` [PATCH tip/core/rcu 08/24] rcu/tree: Force quiescent state on callback overload paulmck
2020-08-31 18:01 ` [PATCH tip/core/rcu 09/24] rcu/tree: Remove CONFIG_PREMPT_RCU check in force_qs_rnp() paulmck
2020-08-31 18:01 ` [PATCH tip/core/rcu 10/24] nocb: Remove show_rcu_nocb_state() false positive printout paulmck
2020-08-31 18:01 ` [PATCH tip/core/rcu 11/24] rcu: Add READ_ONCE() to rcu_do_batch() access to rcu_divisor paulmck
2020-08-31 18:01 ` [PATCH tip/core/rcu 12/24] rcu: Add READ_ONCE() to rcu_do_batch() access to rcu_resched_ns paulmck
2020-08-31 18:01 ` [PATCH tip/core/rcu 13/24] rcu: Add READ_ONCE() to rcu_do_batch() access to rcu_kick_kthreads paulmck
2020-08-31 18:01 ` [PATCH tip/core/rcu 14/24] rcu: Add READ_ONCE() to rcu_do_batch() access to rcu_cpu_stall_ftrace_dump paulmck
2020-08-31 18:01 ` [PATCH tip/core/rcu 15/24] rcu: Fix kerneldoc comments in rcupdate.h paulmck
2020-08-31 18:01 ` [PATCH tip/core/rcu 16/24] rculist: Introduce list/hlist_for_each_entry_srcu() macros paulmck
2020-08-31 18:01 ` [PATCH tip/core/rcu 17/24] kvm: mmu: page_track: Fix RCU list API usage paulmck
2020-08-31 18:01 ` [PATCH tip/core/rcu 18/24] rcu: Move rcu_cpu_started per-CPU variable to rcu_data paulmck
2020-08-31 18:01 ` [PATCH tip/core/rcu 19/24] rcu/nocb: Add a warning for non-GP kthread running GP code paulmck
2020-08-31 18:01 ` [PATCH tip/core/rcu 20/24] rcu: Clarify comments about FQS loop reporting quiescent states paulmck
2020-08-31 18:01 ` [PATCH tip/core/rcu 21/24] rcu: Make FQS more aggressive in complaining about offline CPUs paulmck
2020-08-31 18:01 ` [PATCH tip/core/rcu 22/24] rcu: Remove unused __rcu_is_watching() function paulmck
2020-08-31 18:01 ` [PATCH tip/core/rcu 23/24] rcu/segcblist: Prevent useless GP start if no CBs to accelerate paulmck
2020-08-31 18:01 ` [PATCH tip/core/rcu 24/24] rcu: Shrink each possible cpu krcp paulmck
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